The all time record high temperatures for Los Angeles are the result of a faulty weather stations and should be disqualified

With those hot weather records in Los Angeles being set, it’s important to remember where measurements are taken. I’ve done an investigation and found that every “all time high” reported by the LA Times is from a station compromised by heat sources and heat sinks. In my opinion, the data from these stations is worthless.

It’s been going on for some time, for example, back in 2010, because there’s been a questionable high reading reading at USC of 113°F. This 2010 LA Times article tells why:

L.A.’s hottest day ever

How hot was it? The National Weather Service’s thermometer downtown reached 113 degrees for the first time since records began being kept in 1877 — and then stopped working. The record highs follow a summer of record lows.

September 27, 2010 | By Bob Pool and Rong-Gong Lin II, Los Angeles Times

It was so hot Monday that it broke the all-time record — and the weatherman’s thermometer.

The National Weather Service’s thermometer for downtown Los Angeles headed into uncharted territory at 12:15 p.m. Monday, reaching 113 degrees for the first time since records began being kept in 1877.

Shortly after that banner moment, the temperature dipped back to 111, and then climbed back to 112. Then at 1 p.m., the thermometer stopped working.The weather service office in Oxnard rushed an electronics technician 60 miles southeast to the USC campus to repair the thermometer, which is actually a highly sensitive wire connected to electronic equipment. Because of the snafu, officials said it’s possible Monday’s temperature actually was hotter than 113 — but they might never know.

Or, the data was just bogus because the sensor was failing…but we’ll never know.

Here’s the USC weather station that had ‘all time record high’ surrounded by cars and asphalt. I wonder what it looked like when original record was set?

The ASOS type station used at USC is notorious for producing false record highs where there aren’t any. For example, Honolulu and Tucson.

And just look where the USC weather station is located: (click to enlarge)

Here is a close-up view.


Look at all the service vehicles parked around it. One wonders recent record high that was claimed there is just another result of a vehicle being parked to close to it like the Ice Cream Truck debacle that denied a new all-time record high for Scotland a few days ago.

Then there’s the downtown Los Angeles station, which set a record high the other day. It’s on top of the parking garage at the LA Department of Power and Light, which I first identified in 2008.

More vehicles right next to the weather station…Downtown L.A. set a new record of 104 degrees on Saturday, from this station.

Let’s look at some of the other locations for record high temperatures set in LA this past week. According to this LA Times article:

Among the places that hit that milestone Friday were Van Nuys Airport (117 degrees), Burbank Airport (114), UCLA (111) and Santa Ana (114).

Let’s have a look at those stations.

Van Nuys Airport:

It’s another ASOS station snuggled between an industrial park, runway, road, and taxiway. Note the row of planes and private homes near the taxiway.


Street view of Van Nuys airport weather station:

I wonder, did a plane come out of the driveway and blow hot exhaust fumes that day? if so, we can apparently blame the Germans for this one.

Burbank Airport:

Yes, the weather station is virtually surrounded by asphalt runways, taxiways, and aircraft parking ramps. The likelihood for the station to get in the middle of a 400F jetwash is almost a certainty, being so close to taxiways with turns. This is a ridiculous place to measure for high temperatures.

Back in the day, the Burbank airport didn’t have as much of these biasing factors.

UCLA’s weather station is on the roof of the Math Sciences/Atmospheric Sciences building. Why? there’s no place else to put it. There’s hardly a free and open space left. Here’s the ground view from Google Street View

And the rooftop view. Note the squirrel cage blower and exhaust vent nearby.


And here’s the piece d’ resistance, Santa Ana:

Yes that’s right, it’s on a rooftop at the fire station there.

Here is a closeup view:

A rooftop with air conditioners, a perfect place for measuring high temperature records that are guaranteed to be wrong becuase they are upwardly biased by the roof, the building, and the AC heat exchanger exhausts. But let’s just ignore all that and blame “CO2 induced warming” and demand people stop driving, using so much electricity, and eating meat. Yeah, that’s the ticket.

A reminder, NOAA’s own requirements for the placement of thermometers to record climate data has been violated on every one of these stations.


Thermometers should be shielded from the sun, rain, snow and other sources of light, heat, or cold that can cause erroneous readings. If an instrument shelter is used, it should be designed to allow the maximum possible free flow of air while providing protection from heat, precipitation and light. A shady location on the northeast side of the school is a preferred site.

The thermometer should be 4.5 to 6 feet above the ground and in a grassy location. (You may need to keep a step stool nearby for short people because readings are taken at eye level to minimize parallax error.) A flat, open clearing is desirable so that the thermometer is freely ventilated by the flow of air. Stay at least 100 feet away from concrete or paved surfaces. Avoid balconies, patios, enclosed porches, and beneath eaves.

This is why every one of these high temperature readings made by the stations above should be disqualified.

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Tom Halla
July 8, 2018 6:12 pm

But they all fit the narrative, so. . .

Reply to  Tom Halla
July 8, 2018 7:21 pm

so …. nothing to see here, trust us and move along, there’s a good chap!

David Guy-Johnson
July 8, 2018 6:13 pm

Well done. Surely anybody with a even half a brain must agree that those stations are compromised.

Reply to  David Guy-Johnson
July 9, 2018 7:29 am

well that disqualifies all the climatistas right there.

Reply to  wws
July 9, 2018 9:12 am

Duh, no, because satellite data is showing a steady increase.

Reply to  Chris
July 9, 2018 9:33 am

Only if you use the recent El Nino as your end point.

Reply to  Chris
July 9, 2018 12:21 pm

Duh!! We did not have satellites in the 1930s!!

Honest liberty
Reply to  Chris
July 9, 2018 12:24 pm

I see a steady increase of stupid with comments such as that, offering no citation or evidence to examine.
Good job kiddo… Almost. Well no, not even in the ballpark of intelligent

paul courtney
Reply to  Chris
July 9, 2018 12:42 pm

This is going straight to the “Chris comment Hall of Shame”, no need to wait five years. Does “Duh, no” apply to David or wws? Either Chris is saying those stations are not compromised (in defiance of observed evidence-not his first defiance-of-evidence venture) because, satellites? or is he saying climatistas are not disqualified because, satellites? Chris, that counts as a twofer, non sequiter wise.

Reply to  paul courtney
July 10, 2018 2:10 am

It’s not so complicated Paul. You can choose to accept ground based data, or choose not to. Research has been done on the issue of urban versus rural stations, and whether urban sites are causing a UHI-induced increase in temperature that is unrelated to AGW or other causes. One such paper is here:

As you can see on p. 5, the rural only versus all stations graph shows little difference. The point I was making was that even if you choose not to accept land based data, satellite data shows an increase in temperature as well.

Reply to  Chris
July 10, 2018 9:56 am

It seems as though in these discussions there’s a consistent reply along the lines of regardless of what data is removed the result is the same.

Either the result is robust, or maybe the data processing is just producing a consistent result regardless of input data.

July 8, 2018 6:13 pm

Science. Climate science that is.

Reply to  Dave
July 8, 2018 7:09 pm

Climate science is not involved here. This is a newspaper, in its local section, telling people about the daily temperature records at their local station. People read thermometers long before climate science was a thing.

Reply to  Anthony Watts
July 8, 2018 8:25 pm

“then NASA GlSS etc”
The USC station is in GHCN Monthly because it is a long term record, and so it is recorded by GISS. Burbank has not been there since 1966. Van Nuyts, Santa Ana are not in GHCN-M at all. And GHCN is what climate scientists mostly use. GISS just passes along information from GHCN (except for their UHI treatment).

Reply to  Anthony Watts
July 8, 2018 9:46 pm

Don’t feed the troll!

Chris Wright
Reply to  Anthony Watts
July 9, 2018 3:29 am

Well said, Anthony. And thank you for all your amazing work over the years. I’m sure science will eventually regain its integrity – and you have contributed a huge amount, which must help – but I’m not holding my breath.

I think this climate change catastrophe – encouraged and cheered on by people like Nick – has some way to run yet. (Obviously, the catastrophe is certainly man-made, but it’s not the climate, it’s the alarmism that has caused world governments to squander trillions of dollars, incompetently trying to solve a problem that almost certainly doesn’t exist).

Reply to  Anthony Watts
July 9, 2018 9:21 am

“I’m done with you.” So what? Who freaking cares? Other than on WUWT, how does that affect anything? The few AGW believers who post here and are willing to politely explain their reasoning get chased away, one by one. The world is cooking and WUWT spends its time jumping all over individual weather stations.

Reply to  Chris
July 9, 2018 9:35 am

Self awareness was never a design criteria for the warmistas.
In order to refute an article that points to the many problems with these so called record warm readings Chris declares, it doesn’t matter, just look at how many warm records there are.

BTW, this last winter when people were pointing out all the cold records Chris was in the forefront declaring that it didn’t matter, they were just weather.

Reply to  MarkW
July 9, 2018 9:40 am

So take out this station, MarkW, and see what impact it has on the overall readings for So Cal. Go ahead, I’ll wait.

Reply to  Chris
July 9, 2018 12:31 pm

Once again the troll tries to pretend that the issue is only this one, single station.
PS, check how homogenization is used to spread the bad data from one defective sensor over to other sensors.

paul courtney
Reply to  Chris
July 9, 2018 12:50 pm

Chris: We’ll get to work on that, right after you find a station in the network that biases to lower readings for temp., and show us observations (like the photos above) that prove the low-bias. Just one. We’ll wait.

Jeff Alberts
Reply to  Chris
July 9, 2018 6:05 pm

Chris, the main problem is averaging different locations together. That’s a Bozo No-No, but everyone seems to do it. You can certainly compare it to a nearby station that isn’t so compromised, but no averaging the two together.

Reply to  Chris
July 9, 2018 11:00 am

It’s good that you use the word “believers”. Now think about that.

Reply to  Albert
July 9, 2018 11:26 am

No need to think about it. It’s shorter than typing “those who accept the scientific evidence of AGW.”

Reply to  Chris
July 9, 2018 12:32 pm

Since there is no scientific evidence of AGW, believers was probably the more accurate term.

Reply to  Chris
July 9, 2018 12:25 pm
Reply to  Paul Homewood
July 9, 2018 12:32 pm

I suspect he’s one of those who wants to use global warming as a trojan horse to get hands on more OPM.

Another Scott
Reply to  Anthony Watts
July 9, 2018 10:41 pm

How much can you make as a troll? Is the pay decent? Anyone see what kind of car Nick Stokes is driving or where he vacations nowadays?

Another Scott
Reply to  Nick Stokes
July 9, 2018 11:27 pm

“The USC station is in GHCN Monthly because it is a long term record” when the term started what was around the station? Is it useful as a long term reference if a parking lot was built next to it part way through the term? Should we keep measuring ocean water salinity at the same spot if the the runoff from the french fry plant starts flowing there?

Reply to  Another Scott
July 10, 2018 2:12 am

See the paper I posted above. Then continue to flail about regarding UHI, it’s rather amusing to watch.

Reply to  Anthony Watts
July 9, 2018 8:16 am

And I got “snipped” by a moderator for saying no matter how much data, analysis, etc provided to Nick he will not change his position and will continue to defend all aspects of the orthodoxy. Nick is obviously a smart guy but his continued defense of obvious problems within the whole AGW scenario is rather strange. One ask to ask why? I worked with scientists like Nick who stubbornly defended their view of the world even after presented with massive amounts of data and research to the opposite.

Reply to  Nick Stokes
July 8, 2018 7:40 pm

So, it’s all good?

Reading badly sited instruments is the same as well-sited?

Bureaucrats putting their hot thumbs on the scales is OK?

Patrick MJD
Reply to  Felix
July 8, 2018 8:09 pm

Well, some read sites that are 1200 kms away…so rubbish data is par for the course in Cli-Sci.

Reply to  Patrick MJD
July 8, 2018 8:29 pm

Close enough for government work!

Reply to  Felix
July 8, 2018 9:48 pm


Brooks Hurd
Reply to  Nick Stokes
July 8, 2018 9:37 pm

Nick, The problem that I have noted in the temperature, ice, sea level, polar bear, tree ring, proxy. And other measurements used in climate science is a lack of error analysis. All measurements have errors and you can’t average them away. The siting errors that Anthony has identified are one of the errors. This is a large error and it violates NOAA’s siting standards.

I once corresponded with one of the engineers who was working on satellite sea level measurements. I asked him how could claim an accuracy of millimeters using microwaves with wavelengths more then an order of magnitude larger than his claimed accuracy. He told me that he did many measurements and the error reduced. The problem is that the accuracy does not improve. Intrinsic errors, as Anthony noted with temperature sensor sites, can only be reduced by improving the measurement technique.

Komrade Kuma
Reply to  Nick Stokes
July 8, 2018 9:57 pm

As per AW Nick, BS. It is utter BS that GISS, NOAA and all the other ‘climate science’ institutions who know better are NOT all over the media for this sort of hyperbolic drivel. Anyone with half a brain knows that overwhelmingly what is being recorded is the local UHI effect. I imagine the overall LA UHI is in the 5-10˚ range (let alone what local anomaly to even that) , ie an order of magnitude greater than any purported global warming. The potential for data corruption is massive.

Are you gaoing hard at the LA times for publishing such utter drivel and helping to inform the public about the disservice to proper science theis sort of crap is doing?

Reply to  Komrade Kuma
July 9, 2018 8:12 am

Both USC and UCLA have experienced massive buildup over the past 20-30 years.

Reply to  Bartemis
July 9, 2018 11:40 am

I went to UCLA 30 years ago–I walked by that building hundreds of times. Even then it the area around the math/science building (Boelter Hall) was almost completely occupied with buildings or pavement. Since then there has been a significant building boom–several very large research buildings have been built directly south of Boelter, the south end of the campus has changed dramatically.

And records over time from sensors at that location cannot be assumed to be unbiased.

Farmer Ch E retired
Reply to  Nick Stokes
July 8, 2018 10:58 pm

Ever get the feeling that Nick’s posts are edited by a group and somewhat nonsensical? Maybe the posts are intended to disrupt comments on inconvenient truths. My take is if you want to measure UHI temperature, look at city temperature stations. If you want to measure greenhouse gas, look at baloon and satellite data.

michael hart
Reply to  Farmer Ch E retired
July 9, 2018 3:25 am

I see no reason to think his comments are the work of more than one person. They are certainly always consistent in style: Where there is a valid point being made, he will seek to distract from it by contesting some essentially irrelevant technical point, and ignore the main thrust.

Which is ironic, because there is already a well established scientific phenomenon named “The Stokes Shift”.

Reply to  michael hart
July 9, 2018 1:01 pm

no reason to think his comments are the work of more than one person.


Matthew R Marler
Reply to  Nick Stokes
July 9, 2018 12:18 am

Nick Stokes: Climate science is not involved here.

You are not denying, are you, that those locations have temp readings that are biased upwards?

Reply to  Nick Stokes
July 9, 2018 12:19 am

People read thermometers long before climate science was a thing.

Indeed. I can’t locate the exact station, but there is a station on a UK lighthouse that has seen no local development ever.

Nor has the equipment been upgraded.

It shows no ‘global warming’ at all over its multi-decade history…it’s apparently random variation.

I’ve spent the whole of a cloudless week outside, but yesterday instead of the countryside it was in London. Tarmac capital of Britain.

At LEAST 2 degrees hotter.

Mr GrimNasty
Reply to  Nick Stokes
July 9, 2018 1:26 am

You know how it works Nick. Your presence on here is probably part of the big dirty game. Don’t be all coy.

Such ‘local’ stories are the mainstay of the fraud being promoted by relentless, unscientific, dishonest stories fed into the MSM alarmist/CAGW reinforcement industry.

The undue promotion of such insignificant unverified dubious thermometer readings, and the pre-announcement of records that will be broken (but don’t actually fall), and the constant announcement of records that aren’t actually records at all or are records manufactured by selection of a vast range of criteria.None of the stories ever get corrected, so most of the public is left with the impression the CAGW industry wants.

Nearly every day the BBC tells us the current UK warm spell is ‘record breaking’. What significant records have actually been broken – none? Record breaking = the warmest day so far this year, in England, then Scotland……………. what a load of codswallop.

Reply to  Mr GrimNasty
July 9, 2018 5:24 am

I haven’t seen any responses from Nick Stokes in quite some time. You think Anthony blocked him?

meteorologist in research
Reply to  Red94ViperRT10
July 9, 2018 7:28 am

I hope not, we should be able to read everyone’s ideas.

I would think that station by station we could learn from trends in each station’s temperature data over many years. Accuracy is less important.

Breaking records is a result of coincidences in the synoptic pattern, ridging and ridge axis positions and warm air advection at the low levels, limits on night time heat losses due to clouds and winds. Do we care about coincidences?

Reply to  Red94ViperRT10
July 9, 2018 8:07 am

I doubt it, Nick hasn’t violated any of the usage standards. More likely Nick realized he went too far out on that limb and it was cut off.
He’s going to be quiet for awhile and hope everyone forgets. Then he’ll be back.

Donna K. Becker
Reply to  MarkW
July 9, 2018 9:56 am

Love the reference to Billy Sol Estes.

Reply to  Nick Stokes
July 9, 2018 6:55 am

Nick, even for you that’s desperate.
If these stations are merely local and of no consequence, then why are they so frequently cited as evidence that the world is getting warmer?

Anthony Banton
Reply to  MarkW
July 9, 2018 9:23 am

“If these stations are merely local and of no consequence, then why are they so frequently cited as evidence that the world is getting warmer?”

They are not used as climate, as Nick says.
Try looking at the ever sensationalist media.

Reply to  Anthony Banton
July 9, 2018 9:37 am

Chris’s post of a couple of minutes ago makes a liar out of you.

Reply to  Anthony Banton
July 9, 2018 10:09 am

From a story yesterday in the LA Times: “Among the communities setting records for the day: Downtown L.A. (104 degrees), Burbank (105), Van Nuys (110), Woodland Hills (113), Santa Ana (103), Riverside (113), Escondido (109) and Ramona (108).”

But hey, let’s focus all our criticism on one station at USC.

Reply to  Chris
July 9, 2018 12:21 pm

But the point is are any of those actual records, can one go through each and show that its station’s site has not been corrupted by UHI? It was hot, but was it hotter than any time in the past 150 years?

E.g. Santa Ana is dubious given the station location (see picture above).

I was looking at some Riverside stations and haven’t seen a 113F yet, but so far all of the stations only have data from ~1995, so they any of their high records is useless in a climate discussion.

Reply to  Chris
July 9, 2018 12:30 pm

Records for the day?

Do you know how many days there are in a year, Chris, or are you being deliberately obtuse?

And have you asked the LAT how far back these records go? In most cases I have checked up on, less than 30 yrs or so – ie utterly meaningless

Reply to  Paul Homewood
July 9, 2018 12:37 pm

Paul – these match up to the records that the LAT’s posts on it’s weather page every day – NWS, I believe. It’s quite telling that so many were set in the 1800’s – long before any UHIE. Were more horse farts back then, I surmise.

As I posted a bit earlier:

July 24, 1891 – 103
July 25, 1891 – 109 – Still standing as the all time record high for the month of July.
July 26, 1891 – 102

Reply to  Chris
July 9, 2018 12:34 pm

Notice how the troll tries to change the subject. The article talks about many badly placed and maintained stations, but he wants us all to believe that only this one station has a problem.

Reply to  Chris
July 9, 2018 12:40 pm

The Riverside 113F seems to be from Riverside Municipal Airport (KRAL).

Only been there since 1956 and at an airport …

Reply to  climatebeagle
July 9, 2018 12:56 pm

Riverside Municipal Airport station is about 5.5 miles from UC Riverside station. Here’s the maxes for 7/6 and 7/7.

Airport: 118F, 113F
UCR___: 110F, 101F

The station at UCR is about 200 feet higher elevation.

Jeff Alberts
Reply to  MarkW
July 9, 2018 6:10 pm

All stations are local, and should only be treated that way. Averaging intensive properties is bad. There is no global temperature or global anomaly.

Bruce Ranta
July 8, 2018 6:15 pm

It’s the same everywhere. The other day I drove into town and my truck thermometer said it was 10 C until I got into a dense, built up area, where the temp jumped to 12C. Meanwhile, the radio was reporting it was 17 C. The official thermometer is at the airport on the highest height of land in the region. Asphalt everywhere, and most of the tree cover is gone. It’s always 2 to 10 C higher at the airport than anywhere else.

Reply to  Bruce Ranta
July 8, 2018 8:44 pm

The thing about airport weather stations is that they are very important to the aircraft taking off and landing and the local conditions of temperature wind and visibility are the most important. The jets need to know the temperature of the ground conditions from which they are attempting to take off and land.
These are intended for the airport and should be used as such, not so much for determining regional data.
I suppose in the days of large open grass fields, biplanes and silk scarves they were well sited. Not any more.

Reply to  rocketscientist
July 8, 2018 9:46 pm

I agree, safe flight is the goal. 100% of airport stations should excluded from official weather and climate records.

Reply to  rocketscientist
July 8, 2018 9:56 pm

Which reminds me of George Carlin’s character, Al Sleet; the hippy-hippy weatherman: “Right now it’s 72 degrees at the airport, which is stupid because I don’t know anyone who lives at the airport”

Richard from Brooklyn (south)
Reply to  Bruce Ranta
July 9, 2018 12:26 am

Saw the same thing driving from Krakow to Warsaw. The highways have roadside temp signs so drivers know when to expect ice. As we went from open country to large town or even village the temp went up 2 to 4 degrees c.
BTW the reference in our lead story “we can apparently blame the Germans for this one.” presumable refers to the ‘plane with wartime German markings.
The ‘plane looks to me like an AT6 (SNJ) or Harvard which was made by North American (they also made the Mach 3 B70 Valkyrie). The Harvard was not quite that fast (at least when I flew it here in NZ).

July 8, 2018 6:19 pm

Every media outlet reporting the “heat” story should be confronted with this issue along with a request to cease and desist misleading their viewers.

Reply to  Oatley
July 8, 2018 7:42 pm

Misleading? Those high temperatures are definitely mann made.

July 8, 2018 6:20 pm

Yabut now that Pruitt is compromised it must be troo.

Steven Black
Reply to  Cephus0
July 8, 2018 8:15 pm

True, but if they are the subject of an urban heat island they are just anomalies. I live near Wash D.C and all of the weather stations are at airports. While that does raise the temperature of that immediate area, if you go outside D.C. by 15 miles, it drops 3 degrees. So if you base all of your measurements on faulty placed equipment then you get biased data and poor policy.

Steven Black
Reply to  Steven Black
July 8, 2018 8:17 pm

If you take the temperature in your house and your thermometer is on your oven, then you have biased data. It is not good science to talk about averages for the globe when your data collection is based on crappy site collection.

July 8, 2018 6:24 pm

Don’t the record highs…get adjusted for UHI first?


Chad Irby
Reply to  Latitude
July 9, 2018 4:24 am

Yes, they do.

They bring up the readings in the surrounding rural areas to match the urban ones.


Reply to  Chad Irby
July 9, 2018 8:11 am

The urban sites are more likely to have gaps in the record, which according to the warmistas make them low quality sites. To fill in the gaps, they look at nearby sites that are better quality and assume that the missing data would have behaved the same way.

July 8, 2018 6:25 pm

Beautiful work, Anthony. Really beautiful.

Beware of geeks blaring shifts (in temperature).

Peter Kenny
July 8, 2018 6:26 pm

You violate a fundamental rule of modern journalism: “This story is too good to check.”

July 8, 2018 6:29 pm

(snip, just too stupid to print here, sorry, mod)

Non Nomen
Reply to  Alley
July 8, 2018 11:07 pm

Send the LA Times into moderation as well and then delete all nonsense there. They then might change their name into
“Intentionally left blank”.

Jeff Labute
July 8, 2018 6:34 pm

NO AA man!
I can see them planting grass on the roof and thinking that’s sufficient. Just curious, are electronic temperature sensors used at all? You think one could read temperatures every minute and easily spot anomalies like AC blowing. Mercury bulb is just the standard for some reason?

R. Shearer
Reply to  Jeff Labute
July 8, 2018 8:01 pm

Then they just take every spike as the high, like in Australia.

Percy Jackson
July 8, 2018 6:42 pm

Surely whether the stations are useful depends on what you want to measure. If you want to measure the temperature in downtown LA then you need to place a thermometer in downtown LA surrounds by tarmac, vehicles etc. It will measure a temperature that will then correspond to what people walking about will experience. Whether or not you should use it for climate research is a completely different question.

Reply to  Percy Jackson
July 8, 2018 10:06 pm

On hot summer days, people in downtown LA spend more time in air-conditioned buildings than walking about outside. That’s why it’s such an UHI.

Steven Fraser
Reply to  noaaprogrammer
July 9, 2018 12:08 pm

Yes! And, interestingly, the temps measured are only the temps _outside_.

Reply to  Percy Jackson
July 9, 2018 6:00 am

I up-voted your comment, but I don’t think there are very many people walking around on the roof of the fire station.

Gary Wescom
Reply to  Percy Jackson
July 9, 2018 7:25 am

Percy, you are exactly on point with your comment. The original intent of the national temperature monitoring stations was to record the actual temperature at a station. As you said, it is what people, animals, and crops would experience. It was not intended to provide information about what the station temperature would have been if there was no human development.
The expected overall accuracy of local temperature measurement was expected to be plus or minus a degree or two Fahrenheit. That was certainly considered sufficient accuracy for the system’s intended purpose. Towards that end, stations were supplied with thermometers accurate to a fraction of a degree that were to be sited in specified enclosures at locations with specified local environmental factors (cleared area, surface character, etc). As seen in Anthony’s research, station siting specifications have been only casually followed.
Using data from this temperature monitoring service for climate research is justified simply by it being what is available. However, claims of analysis algorithms that can remove inherent siting and instrumentation variations over time to provide an overall accuracy of better than a tenth of a degree Celsius are invalid from an instrumentation engineering perspective.

Reply to  Percy Jackson
July 9, 2018 8:14 am

And that is the problem with nearly 100% of the ground based weather network.
All of the stations were designed to measure local conditions for the use of the locals.
They were never designed to be used to figure out global climate.

Using a sensor in a way that it wasn’t designed to be used is not scientific, and neither is most so called climate science.

Gungas Din
Reply to  MarkW
July 9, 2018 3:34 pm

Planes need the local conditions to take off and land.
Airports tend to be manned 24/7. Other locations that are manned 24/7 and provide temp data tend to be in urban areas.
All that data is fine for LOCAL conditions.
But most of the globe is water. Most of the land is rural.
They are trying to use the abundant urban data to produce a GLOBAL measure of temperature.
Data not suited to purpose. (And they’ve fiddled with it on top of that.)

PS Many have wondered why Anthony is so “miffed” at Nick Stokes.
I suspect that Anthony knows that Nick knows just what “data” goes into the various “global” temp databases.
Anthony doesn’t mind disagreement but he does value honesty. Nick has been dishonest here.

Philip Schaeffer
Reply to  Gungas Din
July 11, 2018 12:54 am

All stations should be recorded. You don’t hide results, ever. What if you want to study UHI? How are you going to do that if you don’t record everything. Exactly what stations you use for what purpose is another issue. Do you actually know which temperature records use which stations? Most don’t use even close to all stations.

Randle Dewees
July 8, 2018 6:58 pm

Well, it was stinking hot – Friday I was looking at 106 F on the old min/max buried in the shade of my Pop’s east side of the house patio in Laguna Niguel. And that was at 6PM. Sat I drove across LA on my way home and it had that heat wave look – no wind and strange thin clouds. Certainly not the first time I’ve seen that in the 50 years I’ve been in the area. Of course, it was a humdrum 112 here in the north Mojave.

Reply to  Randle Dewees
July 9, 2018 6:11 pm

Geoengineering spray clouds

Lee L
July 8, 2018 7:21 pm

“UCLA’s weather station is on the roof of the Math Sciences/Atmospheric Sciences building.”

Because there was nowhere else to put it.

Won’t reveal the university, but one geophysics academic revealed to me in ’70 that the telescope on the top of the Geophysics Building, and so near to the light pollution of the city, was put there to provide a staircase to the roof..
Umbrellas and drinks up there for grad students.
Use it or lose it budget wisdom.

A variation on ‘nowhere else to put it’ … say.. noway else to pay for it.

July 8, 2018 7:25 pm

Anthony..typo ?

“Yes, the weather station is virtuallt surrounded by asphalt runways” virtually ?

Reply to  Marcus
July 8, 2018 7:36 pm

and here:

A rooftop with air conditioners, a perfect place for measuring high temperature records that are guaranteed to be wrong becuase

one more here:

This is why every one of these high temperature readings made the the stations above should be disqualified.

R. Shearer
July 8, 2018 7:57 pm

It’s OK, the pope says you can stick your thermometer where ever you want.

Jeff Alberts
Reply to  R. Shearer
July 9, 2018 6:17 pm

If you like your thermometer, you can keep your thermometer.

And if it’s one that goes where the sun don’t shine, you’d BETTER keep it!

July 8, 2018 7:59 pm

But the records will have been “adjusted” for location factors, surely????

July 8, 2018 8:15 pm

“The all time record high temperatures for Los Angeles “
Was there a claim of an all-time record there (this year). The LA Times article listed a number of daily records for various stations. But I don’t see how that could be disqualified. Stations seem to have a daily record for every day of the year. If you disqualify this one, why would the last one be better? It seems to me that if stations are reporting temperatures, somewhere there will be a maximum that people will note, and I don’t see how that can be prevented.

Philip Schaeffer
Reply to  Anthony Watts
July 9, 2018 2:20 am

Well, if you are in downtown LA in the middle of an urban heat island, you will indeed experience the temperatures shown. That’s what matters immediately if you are actually there. How useful this is in examining climate is another issue. I didn’t see anything in the article trying to make a point about climate or global warming based on the recorded temperature at those locations.

What are they suppose to say?

“Well, it’s stinking hot down here, but it doesn’t count because UHI, so leave your jumper on”

Philip Schaeffer
Reply to  Philip Schaeffer
July 9, 2018 5:19 am

I’d be fascinated to know exactly why the people who clicked “-” did so? Let me have it. Go for gold.

Jeff Alberts
Reply to  Philip Schaeffer
July 9, 2018 6:19 pm

It’ll be hotter on a roof than it will be on the street.

Reply to  Anthony Watts
July 9, 2018 6:03 am

Heat getting to you, Tony? You sound cranky.

Reply to  Nick Stokes
July 8, 2018 8:51 pm

The stations ENTIRE record should be disqualified …

richard verney
Reply to  Nick Stokes
July 8, 2018 10:50 pm

I for one always value Nick’s input.

Nick is anything but a tr@ll, and usually puts forward a reasoned position together with supporting evidence/links. As sceptics, we should welcome seeing the other side’s arguments, and we should take the time to evaluate their worth. It is important that sceptics do not get blinded by group think, or merely jumping to dismiss any opinion that we do not like.

This site is populated by people who are literate, for the main scientifically literate, and who can form their own views on the worth of any comment that Nick makes, and whether the comment may (or may not) be tainted by bias and/or lack of objectivity.

Personally, and I emphasise that this is my own personal opinion, I see little point in pointing out that the comment is biased or not objective, and it should be left to the reader to make up their own minds.

Turning now to the issue, a station whose siting is compromised should never be used as an indicator of absolute temperatures, but even if it is biased by siting issues, it does not necessarily follow that its anomalies will not be informative, at least over the period when bias was continuous. For example, it may be that this station can tell us nothing of temperatures when compared to the 1880s or the 1930s/1940s, but can tell us something when compared to say the temperatures of the 1990s.

Nick knows my position. all stations (worldwide) should have been audited, any station not ideally situated should have been thrown out. We should be using only the best sited stations which we would now retrofit with the same equipment (LIG thermometers, same enclosure type, same paint etc) as historically used at that station, and we should then take modern day measurements using the same TOB as used at each station, so that we can obtain modern day unadjusted RAW data which can be directly compared to past unadjusted RAW data on a station by station basis.

We should only compare stations with themselves, and not seek to construct some global or Hemisphere construct. We would then know a definite fact, namely whether temperature at point A, had or had not increased from the temperature at point A back in the 1930s/1940s. The same with point B, point C etc. There would be no fancy statistics (krigging, infilling, spatial adjustments, homogenisation and the like) to distort the results.

There is plenty of money in this science. Let us see what say the best 200 sited station when compared individually with themselves.

Philip Schaeffer
Reply to  richard verney
July 8, 2018 11:15 pm

Haven’t you heard? According to Anthony he isn’t just a tr@ll, but a paid tr@ll!

Reply to  Philip Schaeffer
July 9, 2018 1:19 am

Nick, like Griff, is a professional troll.

I don’t know whether they are paid or not, but what characterises their posts is that they simply do not retract even when they are shown to be lying. Their motive is clearly not to arrive at the truth, but to achieve a result that vindicates global warming.

This is similar to skepticalscience.

Some years ago I wrote a piece on why renewable energy wont work – basically picking up on the work of Professor David Mackay – essentially highlighting the issue of energy density and what that meant for ‘green technology’ and developing the arguments against it based ion its intermittency – a topic that was almost unmentioned then, but is now recognised as a key drawback.

It was the first time I had used my real name online since 1986

As SOON as that paper was starting to be given positive feedback, a post from someone like Nick Stokes came up saying that the ‘well known climate denier Leo Smith “whose ideas had been refuted years ago” should be simply ignored’.

Now at that time I was still undecided about global warming., I had not actually made any posts about it at all. I had merely as an engineer, expressed deep reservations about the holistic efficacy of renewable energy.

Needless to say that response convinced me that climate change too must be a false premise, otherwise why attack me as a climate denier, when all I had denied was that renewable energy was a viable cost effective solution?

There most certainly are one or more groups of people who communicate by social media and whose apparent aim is to descend on any site or any post that challenges climate or renewable energy ‘orthodoxy’ and use any means at their disposal to trash it, flood it with disinformation and generally use all the agitprop and astroturf style techniques to devalue it that they have learnt.

Whether – as in the case of Microsoft – they are actually paid to do it, I do not know.

BUT it is entirely consistent with the way the hard left and other firmer Sovbloc funded groups operate. The aim is never to arrive at the truth, but to destabilise and disrupt and sow dissension, in order to achieve narrow political – and these days commercial – aims.

I have reported various people to the ASA for fraudulent support of renewable energy based on false claims, but the response has been ‘religious, political and political lobbyists are not bound by the Advertising Standards Authority.

What this means, and its highly alarming, is that commercial sponsorship of trade associations like Renewable UK, and money channelled to organisations like Greenpeace, can be used to further political and commercial interests without actually being subject to any restraint whatsoever.

And those are the organisations to which the UK government deferred when formulating energy and climate policy. Paid liars.

When I ran an anti-windfarm campaign, the website reported that the highest number of hits came from the PR firm employed by the large company behind the wind farm.

I ended up directing propaganda exactly at them – from decrying windmills, to basically attacks on the character and nature of the billion pound company itself.

The windfarm never got built.

But when seeking support from other organisations I got another shock. The political parties attempted to take over our campaign and water it down. Local conservation societies would not go against the government either, as they were in receipt of grants from the government and the EU.

Britain it appeared was totally as corrupt as any third world dictatorship. A network of support grants, public sector employment and the like is basically used to coerce individuals, right down to local level, to go along with lines drawn up by political and commercial influences behind the scenes.

Focus groups, opinion polls, and market research are tools used to discover how well any given campaign is going, and massive PR releases to media, pressure exerted on editors, ensure that the MSM is ‘on message’ and then the independent news sites like this one are covered by paid and unpaid trolls whose function is to give the impressions to the casual observer that dissent exists and to discredit no matter how risibly and demonstrably falsely, any line that is likely to contradict the ‘on message’ position.

I know this from personal experience, so it seems does Anthony. My journey into essentially exposing renewable energy’s deficiencies, and opposing a local windfarm convinced me of something I simply did not believe before: Namely that the media and the government and most of the action and lobby groups were fully bought and paid up puppets of organisations with very deep pockets, and that not a single piece of news is allowed to be published that does not, by and large, fit the message.

The likes of Nick Stokes are identifiable elements of that corruption, and to be fair, in a society where fewer and fewer people are needed to do actual productive work, the chance of a salary doing something as reprehensible as being a climate troll, is probably no worse than prostitution.

With due respect to the likes of Willis, I have to say that my experience is that this is not about the science, and it is not about the technology. It is about the depth to which marketing has replaced information in the media. This is a direction that started in WWII and reached unheard of heights in the Cold War, where the residue that is left (or Left) is what you in the US would call ‘Liberal’ thinking – left over from Russian bloc funding to ‘peace’ ‘social justice’ and ‘anti-nuclear’ groups who morphed into ‘environmental’ groups as the likes of Greenpeace were infiltrated and subverted to the Cause..

It is not far fetched to say that 97% of everything you read in the media is carefully crafted propaganda whose message and whose funding originates in places few suspect. And who will if challenged ascribe those that oppose the message to being funded by those who are in fact funding the message!

These people are the people they warned you about!

Nearly all of the Left is owned by the ‘Capitalist Scum’ they rail against 🙂

What started out as a way to destabilise and demoralise the West, because the Soviet bloc lacked the economic power to challenge in the arms race, has been taken up by other political and commercial interests as a tool that can be used to further their own interests.

They own Hillary Clinton, And they own much of the Republican party, but it is not clear that they own Donald Trump.


They certainly own Nick Stokes. Whether he knows it or not.

Philip Schaeffer
Reply to  Leo Smith
July 9, 2018 1:30 am

Yeah, well, while you rant on about politics and ideology, he keeps talking about science. Even if you don’t agree with him, he has an excellent record of explaining himself in a manner that allows understanding of why he thinks what he does, allowing for people to make their own mind up about his conclusions.

honest liberty
Reply to  Philip Schaeffer
July 9, 2018 9:39 am

riiiiiight. He has an excellent record of obfuscation and red herrings. He nitpicks fine detail (unrelated to intent, while only supporting adjusted status-quo narrative data) all-the-while denying the reality of the politics behind the false narrative, just as yourself constantly evidence with your posts.

D. J. Hawkins
Reply to  Philip Schaeffer
July 9, 2018 9:54 am

The issue isn’t really about whether or not a particular station is part of the GHCN, and Nick knows it. Nick it just throwing up a smoke screen. The point of the post is that these temperature readings are being used by the MSM to bolster the claim of global warming. In response to that effort, it matters very much that their suitability for climate purposes be thoroughly vetted, or in these cases, trashed.

Another Scott
Reply to  Philip Schaeffer
July 9, 2018 10:55 pm

Yeah, well, while you rant on about ranting on the science has turned into political science…

honest liberty
Reply to  Leo Smith
July 9, 2018 8:04 am

whether he is paid is debatable. I am intrigued by Mr. Watts frustration, but I certainly can appreciate the reason. I am surprised though because it doesn’t look well upon us to tell him to shut up. To be fair though, I call him a liar, because Nick Stokes is a liar. So…I suppose it could be viewed as excessive, even though it is an accurate appraisal.

Are there paid trolls? A quick search found:

Reply to  Leo Smith
July 9, 2018 10:39 am

Thanks, Leo.

This is Comment of the Day.

The formation and changing of political views was and is a major focus of study of the Frankfurt School, including Erich Fromm, etc. They figured out the nuts and bolts of how we come to be aware of issues (via education, media, and informal networks), form our opinions (we want to be correct and we want to be virtuous, and not one of the uninformed or ignorant people so we adopt those opinions that allow us to be so), and how we can be influenced to change our opinions (education, media, informal friends).

All of that is genuine Social Technology, just as many here know engineering technologies. Once known, this technology has been used against us to advance the Marxist views held by the Frankfurt School, and all of the Institutes of Social Science Research that dotted up across academia once Frankfurt School came to the U.S and set theirs up at Columbia.

Reply to  Leo Smith
July 9, 2018 5:40 pm

Leo, all you describe is exactly what I came to concluded about half way through my career while working in environmental science, politics, the bureaucracies and the news media at all levels. At first I was in disbelief and denial. I didn’t want to believe what I was seeing and experiencing. I describe myself today as a recovering idealist. Yet even as a cynic and skeptic I couldn’t believe how naive I had been. Yet as I dug deeper, did detailed research on the situation, it became undeniable. When I challenged people and events I was attacked, investigated, and accused of being bought and paid for. Even a couple of my devout enemies said the last just was not possible.

I would note, I wrote back in the early 1990s that while the USSR was split up all it really did was rebrand itself. Putin, once destined to be the head of the KGB, has stated one of the worse tragedies in world history, was the dismantling of the Soviet Union. He has clearly blamed the USA of such historical tragedy. The idea that he wouldn’t use all the old and new evil tools, as well as useful idiots and fellow travelers developed by the KGB to disrupt the West, especially the USA, is being extremely naive and shows a lack of imagination.

As has been said many times, those that do not learn from history——

CAGW has very little to do with saving the earth. While humans do things that harm the planet, burning fossil fuels is not one of them. Spending trillions to fix CAGW while simpler environmental problems with proven solutions exist which cost much less, is the real problem.

Eystein Simonsen
Reply to  richard verney
July 8, 2018 11:50 pm

Reasonable. Nick Stokes isn’t a troll, less paid. But he could be smart and support your intention in Watts’ piece. Out with those stations! Verney gives us the recipe: the best 200 sited station when compared individually with themselves.

Reply to  Eystein Simonsen
July 9, 2018 1:23 am

He is and I suspect he may well be.

honest liberty
Reply to  Leo Smith
July 9, 2018 8:05 am

and if true would obviously never admit it

Reply to  richard verney
July 9, 2018 12:54 am

Great comment! Let us see what the best sited stations show! Any number (even much less than 200) of the best sited stations would be very valuable, any time period.

Jeff Alberts
Reply to  Edim
July 9, 2018 6:22 pm

Just don’t average them together. That equals nonsense.

meteorologist in research
Reply to  Jeff Alberts
July 10, 2018 12:13 pm

Jeff Alberts
“Just don’t average them together. That equals nonsense.”

That’s right, we should just use any trends we can find and keep the trends separate. I don’t see how averaging them will make the data more reliable for climate questions.

Interpolation is done in the data grids for numerical weather prediction, but that’s repeatable and testable on a daily basis. It’s not averaging.

Philip Schaeffer
Reply to  richard verney
July 9, 2018 1:17 am

Well, all stations should be recorded. Which ones you choose to use is another issue.

Anthony, I read the “Press Release – Watts at #AGU15 The quality of temperature station siting matters for temperature trends” article from 2015.

I’m curious to know how big the difference in trend is between your “ideal” set when compared to the stations that are actually used in the most commonly used temperature records, as opposed to only comparing against ALL stations. (assuming I have understood correctly what is being shown in the graph at the top of that article)

If this has already been done (by you or anyone else), I’d appreciate a link to it.

Basically, I’m trying to determine if the magnitude of the difference in the trend is the same as what I see there when comparing to the temperature records that are most commonly used by scientists, which don’t use all stations.

Reply to  Philip Schaeffer
July 9, 2018 4:54 am
Philip Schaeffer
Reply to  EdB
July 9, 2018 5:14 am

The guy who has been banned from Watts Up With That?

Reply to  Philip Schaeffer
July 9, 2018 8:53 am

I haven’t seen anyone suggest that data be thrown away completely.
Does anyone have a copy of the chart that shows how these stations are rated?
If memory serves, they are ranked from 1 to 5. A 5, which these stations clearly are would be expected to have errors of greater than 5C degrees.

Found one:

Reply to  Philip Schaeffer
July 9, 2018 9:25 am

Philip, I completely disagree. No scientist should use a measurement device that doesn’t match stringent standards. We should accept no station which isn’t classified as a 1 or a 2. I understand the desire to know what the temperature is at a given time in Los Angeles, but if the NOAA uses a station classified as 3 or higher it’s going to skew data and therefore damage science.

Philip Schaeffer
Reply to  Jake
July 9, 2018 6:09 pm

So how are you going to know what the temperature is in UHI areas if you throw away the figures. You keep everything. What you use and for what purpose is another matter. If you are in downtown LA in a large UHI, then the temperature you are going to feel is what is measured there.

If you are telling people what temperature they will experience in downtown LA, you don’t say “well, I could tell you how hot it is downtown, but it doesn’t count because UHI”

What stations you use when assessing climate is another issue.

Michael Wood
Reply to  richard verney
July 9, 2018 6:50 pm

You know as well as I do, satellite measurements have superseded these antiquated stations… satellite data does not support any of these records.

Reply to  Nick Stokes
July 9, 2018 8:17 am

Once again, Nick tries to defend the indefensible by claiming: It’s all we’ve got.

If the sensor is not suited for the task at hand, then it should be disqualified and all it’s data rejected. Period.

Rick Sharp
July 8, 2018 8:37 pm

It was hot out here in the East San Gabriel Valley. I saw 118 on the Bank and 117 in my car. Weather Underground had 119 in Glendora. I know these are all unofficial but all I’m saying is it was damned hot Friday.

honest liberty
Reply to  Anthony Watts
July 9, 2018 8:17 am

Anthony, are the thermometers in vehicles biased in one way or dependent upon how long it has been running?
Typically in Denver, my 2007 Dodge Ram 1500 Laramie model with Hemi displays a temperature when I start it, but after I drive a bit it cools down slightly (typically once I get moving away from downtown). Then, once I travel about 10 miles Northwest to Arvada (much less dense and slightly higher elevation) it is almost always 3-5 degrees less.

The other day I left G-force motorsports off Wadsworth and Colfax, and my truck read 91 while a few blocks up the way at the cemetery their sign said 97. I was pulling about 1300lbs between the trailer and the ATV I was towing on the trailer. I can’t make heads or tails of my vehicle thermometer and the degree of accuracy it actually has.

I’m assuming 5 degrees +/- is not unexpected?
And to be fair, it has been scalding hot in Colorado these past few weeks, and of course, the media is just playing up the CAGW like mad. I have a special type of anger for radio sports talk shock jocks who mention global warming casually, not understanding the goal post has been moved, and of course, they have zero time invested into investigating what they have been told. So they put all that false information out into the ether for unassuming listeners. It is mind control plain and simple, whether or not intentional, and it absolutely contributes to the general perception.

Pardon, two thoughts thrown in together but I felt it was applicable.

Reply to  honest liberty
July 9, 2018 9:07 am

Reminds me of a fun drive a few years back, here in Los Angeles. Was talking to my Dad on the phone (he’s in San Antonio area – hill country), and I was driving over the Mulholland Pass on the 405 freeway (was actually moving well – at 70mph+). Was a hot summer day in the valley – and the car read about 102F – as I headed south to the West side to Culver City. Told my Dad – that I’d read the temps to him as they dropped from the top of the hill, going down. By time I got home, some 12-15 minutes later, the temp read 74, as I pulled into my driveway. Dad really got a kick out of that.

I think that we topped out here at our house on Fri (the hottest day of this heat wave) at about 96. Fortunately, the humidity was below 20.

Reply to  honest liberty
July 9, 2018 11:09 am

The temperature sensor is biased by where it is located within your vehicle. Most are located under the hood near the engine. They are located presumably in air flow, but as such will only measure the temperature under the hood, not the temperature of the neighborhood.
Bright sun heating the metal of your car is what the thermometer reads.

Jeff Alberts
Reply to  rocketscientist
July 9, 2018 6:25 pm

“The temperature sensor is biased by where it is located within your vehicle.”

On my Toyota Matrix it’s located in front of the radiator. Don’t know if they’ve shielded it at all from radiator/engine heat. But I notice it always reads lower than the one on the big sign in the parking lot at the equipment rental place I pass by every day. Sometimes they’re within a degree or two, sometimes by 4 or 5 degrees.

Reply to  honest liberty
July 9, 2018 5:32 pm

the temperature change after first starting up is due to heat soak. Your car was collecting heat from just sitting in the sun, and the dead air around the temp sensor was higher than the air outside (just like the air in the cabin is hotter when you first open it up). when you drive around a bit the airflow pushes that abnormal heat out and you get a truer measure of external temp. You can also see this on cold days when you get in the car and the temp warms a bit while driving.

edit: TBH though, because of the heat from the car and all it’s system the Temp will have some positive bias compared to external air. You may see this if you are running but sitting at idle.

Jeff Alberts
Reply to  Gino
July 9, 2018 6:26 pm

Yeah. My work van has a temp sensor for outside temp. It might read 90 after sitting in the parking lot for hours during midday (clearly I’m not working enough). But when I start moving it cools down a bit.

Reply to  Rick Sharp
July 9, 2018 5:28 pm

I was driving to Nevada and stuck in the traffic Jam at the 15/215 interchange (leaving the LA Basin). Traffic was stop and go at about 5mph. My truck registered 118F at 1:50PM in that mess. Ten minutes and about a half mile later, as I broke out of the jam and traffic opened up the temperature dropped to 109F. 9 degree difference between the trapped air around the cars and the open air (still over the freeway concrete). Vehicle temp sensors are generally well shielded from convective effects so they tend to show dead air temperatures.

On Saturday in Mesguite NV, my truck had been parked all day in a driveway (grey concrete, heat soaked til 4pm) and registered a temp of 109F As I backed out of the driveway over the black top the temperature increased to 112F in the space of less than 2 min.

The sensors on vehicles may not be laboratory grade but delta readings give a good indication of changes in the environment. UHI and the effect of concrete and asphalt is massive.

meteorologist in research
Reply to  Rick Sharp
July 10, 2018 12:22 pm

The weak ridge axis is actually trailing west-southwest, so it didn’t look like a particularly hot pattern. But WAA everywhere, which is not typical for your low levels, so it must have been enough, along with clear skies, and the Sun very high early in July.

Johann Wundersamer
July 8, 2018 8:39 pm

“This is why every one of these high temperature readings made the the stations above should be disqualified.” –> This is why every one of these high temperature readings made BY the stations above should be disqualified.

John F. Hultquist
July 8, 2018 8:44 pm

Here’s Johnny:
“It was so hot today I saw a robin dipping his worm in Nestea. ”

“It was so hot today that Burger King was singing, “if you want it your way, cook it yourself.”

Best use of hot temperatures ever!

July 8, 2018 9:29 pm

Is there any precise info on the temp station at SeaTac airport, south of Seattle? One day this May, they reported 88 deg F (allegedly a record for that day), while my suburban thermometer, 25 miles away, was reading 78 deg.

John F. Hultquist
Reply to  Maxbert
July 8, 2018 9:59 pm

The Puget Sound area is a diverse place such that 25 miles from SeaTac can put you out at North Bend, or 1,000 feet higher, or in a valley with cool air descending, or near a cool surface lake.
Do several loops around your area, both morning (cool) and late afternoon (warmer) and log the temps as you go. If your rig doesn’t have in-dash temp, borrow one that does. The changes should be striking.
The host of WUWT will sell you an in-car temperature logger, if you want to get serious about this.
Alternatively, ride a bike up and down the hills and feel the changes.

Jeff Alberts
Reply to  Maxbert
July 9, 2018 6:29 pm
John F. Hultquist
Reply to  Jeff Alberts
July 10, 2018 9:24 am

Thanks for the link to your post.
If you use Google Earth, you can go back in time via the clock button.
Do that and move the slider back to 7/2006. The area west of the then existing runways
is bare earth [ compare to the previous image 6/2006 ].
I wonder if that construction period altered the temp readings ?

J Mac
July 8, 2018 9:34 pm

Excellent work, Anthony!
The siting conditions for these sites are beyond belief bad, such that no one of a sound mind would try to defend them. And then, unbelievably, Nick stokes the faux flames of AGW in his alternate universe attempted defense of this crap. Also beyond belief bad….

Reply to  Anthony Watts
July 9, 2018 9:34 am

Here is the thing Anthony, I have felt that Nick presents his arguments in a way where discussion is possible. Dave Appell is another sort of activist, and I use that word on purpose. I understand DA’s scientific credentials, but he doesn’t conduct himself in a scientific manner on the discussion boards who tolerate him. He does his argument a disservice in terms of persuasion. UHI is your expertise, so I think that Nick may have struck a nerve. BTW, thanks for the great article.

Philip Schaeffer
Reply to  Anthony Watts
July 10, 2018 2:04 am

Well, some analysis of exactly which of these stations are used for what would be useful. All information should be recorded, but not all should be used to examine climate.

July 8, 2018 9:43 pm

The question is how old are those weather stations? If the article is comparing new stations located such that the readings are skewed compared to older stations placed in cooler areas, then they have a point. But, if these same stations are comparing data to their own history, then there is no problem with the data. I only have 1/2 a brain and I done figgered that out nice and quick like.

Reply to  Anthony Watts
July 8, 2018 10:32 pm

Well, the data is fit for purpose – if you are studying the effects of various environmental changes on UHI. Not for anything else, of course.

My outdoor thermometer is fit for purpose, too – it’s the temperature of the area where I spend most of my time when I step out back. Sited on a beam of the porch, with the block wall on the back of my house not quite six feet away. Says nothing about the temperature anywhere else in town (even my next door neighbor’s back yard, consistently reading about five degrees cooler – but his back wall is wood, he has a lot more greenery, the retaining wall is also wood where mine is again block, and his thermometer is out by his koi pond).

Reply to  ron
July 8, 2018 10:20 pm

The location is unacceptable…

John in NZ
July 8, 2018 9:47 pm

I am sure the ‘all time record high’ stories are because there hasn’t been enough warming in the data sets.

Our news in NZ has been filled with AGW stories recently. Our Climate Change Minister (and Leader of the Green Party) is introducing a Zero Carbon Bill to Parliament.


I think not.

John F. Hultquist
Reply to  John in NZ
July 8, 2018 10:03 pm

No more beer?

John in NZ
Reply to  John F. Hultquist
July 9, 2018 1:43 am


They clearly don’t comprehend the consequences.

Walter Sobchak
July 8, 2018 10:16 pm

It looks to me like the USC station is on a lot covered with gravel. I don’t think that is according to specification.

July 8, 2018 10:17 pm

At least we now have the USCRN temperature station network which are supposed to be high quality.
“The stations are placed in pristine environments expected to be free of development for many decades.”

comment image

July 8, 2018 10:17 pm

The lack of knowledge in locating these stations is not surprising. Most installers are simply doing what they are told, and not given the underplaying criteria for an unbiased location.
I see it every day while auditing commercial properties for energy use.

July 8, 2018 10:21 pm

I’ll agree the temperature records at the airports and the schools and such were compromised, however, I grew up in Los Angeles and let me tell you – it was extraordinarily hot. I’m curious what the readings were at Griffith Park/the Observatory & up at Mt. Wilson. Maybe Cal Tech too. Those areas haven’t changed much (especially Mt. Wilson) so you ought to be able to get a good idea of the temps compared to the same day the records were set in the past.

Alan Kendall
Reply to  Ashby
July 9, 2018 12:37 am

I wondered this as well. Surely there are some better sited weather stations in LA? What did they record? If they recorded lower temperatures, then it’s a question of cherry picking, if they recorded record high temperatures, then poorly sited locations might still provide usable data (unlikely?)

Reply to  Ashby
July 9, 2018 11:17 am

I don’t think there is a weather station located within the LA basin that has not been corrupted by local development.

Reply to  Ashby
July 10, 2018 10:25 am

San Rafael Hills (SRXC1) looks pretty good, 113F on 7/6 (Fri), 107F on 7/7.

Not sure how to get more data for that station, anyone have a link to get a full data set?

Non Nomen
July 8, 2018 11:00 pm

…stay at least 100 feet away from concrete or paved surfaces. Avoid balconies, patios, enclosed porches, and beneath eaves.

Why don’t they stick to their own rules? Are they that stupid to think that nobody will find out? It’s irrational.

July 8, 2018 11:15 pm

Unbelievable … these “weather ” station administrators get away with thumb on the scale bias .
Weather stations next to jet runways and tennis courts ? WTF .
Why not just stick them on power plant stacks ?

Robert B
July 9, 2018 12:41 am

The population of LA in 1900 was 100 000. Even in 1939 only 1.5 M when the temperature at long beach was recorded as 109 F.
The city itself is now 4 M but with 18 M surrounding it and an order of magnitude more cars, even well placed stations need to break long held records by degrees before you can pretend its something unprecedented, and even then unsure because there were no measurements in the MWP and fewer places being recorded until recent times. And Long beach seems to have only hit 109F while 112F was recorded in Orange County in 1939 when 50 people died.

July 9, 2018 2:03 am

Off-topic question: What is the Luftwaffe plane doing parked at Van Nuys Airport?

Non Nomen
Reply to  Graemethecat
July 9, 2018 2:38 am

Would you like to see it doing an air raid?

Eustace Cranch
Reply to  Graemethecat
July 9, 2018 3:01 am

There’s a place called Hollywood near there, in case you haven’t heard. Lots of money to be made leasing period-vintage aircraft.

Reply to  Graemethecat
July 9, 2018 6:41 am

Besides the obvious Hollywood uses, restoring old military aircraft (often called “War Birds”) is a popular hobby amongst pilots. Just as likely, that is someone’s pet project.

Reply to  Graemethecat
July 9, 2018 9:25 am

There have been many airshows around LA region this summer and I see a lot of the aircraft using VNY as a base of operation. Every weekend you can see flights of 4-5 WWII aircraft either taking off or landing, very fun when you’re out driving someplace and suddenly a formation of these comes into view.

Gungas Din
Reply to  Graemethecat
July 9, 2018 4:08 pm

I can’t tell. It looks a fighter with an air cooled engine with a cowling. The wing tips are a bit squared off. The cockpit extends back. (That is, if the pilot looked over his shoulder, he could see what was behind him and not just the back of the cockpit.)
I’d guess a later Focke-Wulf Fw 190. But that’s just a guess.

Reply to  Graemethecat
July 9, 2018 5:50 pm

looks like a T-6 or similar variant trainer painted in luftwaffe colors. probably one of those air combat groups that lets people “fly” in mock dogfights. There are a few of those around here.

Dr. S. Jeevananda Reddy
July 9, 2018 4:11 am

hen I was a scientist with ICRISAT Hyderabad, I prepared a booklet on met stations to provide guidelines to students from developing countries. When they go back they should check weather station in his location fits in to the recommendation, if not correct them to the standard. Also I visited agromet stations in India and corrected deviations if any. In Africa I saw some problems basically because of paucity of funds.

In USA, urban heat island is a different issue. But the stations that does not fit in to the recommended system, they are unfit for even urban heat island effect computations.


Don Jindra
July 9, 2018 5:41 am

There may be some truth to this but, nevertheless, it was very hot. Those thermometers were close enough to the truth. I live in Hollywood. I don’t have air conditioning. So I was in the heat. On Friday it was at least as hot as it’s ever been in the ten years I’ve lived here. I lived in Phoenix for ten years and it was one of the few days in LA when it felt like Phoenix.

Bloke down the pub
July 9, 2018 6:02 am

How do these supposed records compare to any USCRN readings?

Marc Mueller
July 9, 2018 6:30 am

Long time ago (early 80’s), standing lookout watch on the Dwight D. Eisenhower, I’d be feeling cold until an F-14 took off and then for a minute, I could bask in what felt like a warm summer day.

July 9, 2018 6:44 am

Anthony — since you did that great study which identified trustworthy weather stations for comparison against the whole — are there ANY good stations of record in the LA basin to which these records could be compared?

July 9, 2018 6:52 am

And of course our various trolls still insist that an increase in the number of record highs is proof of global warming.

Bruce Cobb
July 9, 2018 7:26 am

Deadly 11-day heat wave, with record high temps – 107 years ago:

Given the same conditions today, the recorded temps would have been much higher, and the globular warmunists would be screaming that we had reached warming armageddon.

July 9, 2018 7:27 am

Independent of human influences is (was?) the basic concept of microclimate. Ecologists used climographs (must be ancient terms, not in speller) where temperature was plotted against precipitation, usually means. Similar graphs plotting salinity against temperature were used in marine science. While good for comparing seasonal and regional differences, would these be useful otherwise. Don’t recall seeing any lately, are they around anymore?

Robert Osborn
July 9, 2018 8:02 am

Its pretty crazy. I have two outside thermometers, living near the beach, a second story pops out of the first story roof surrounded on 3 sides by roof. One thermometer outside a window on north side of 2nd story. The other one in a shaded narrow north south breezeway in first story. Friday during the heatwave here in Orange County, CA the upper floor thermometer maxed at 97deg and the first floor thermometer at 88 degrees. Trying to figure that out. Beach is just on the other side of a row of houses on the southside of the alleyway that I am on the north side of with about 100 yards of sand in front of that line of houses. There is a six foot space between the houses in line with my breezeway so you can see the beach from my breezeway. Light breeze was from south blowing over the Pacific Ocean. The official local weather station about 4 miles south on the beach registered the same high at 4:53pm as my 2nd story thermometer above the 1st story roof and I recall that was somewhere in the 4pm hour. So I figure it must be the first story thermometer in the breezeway was being affected by that southerly breeze coming off the ocean funneling between the 2 houses to the south right through my breezeway, sliding under the hot air like an approaching cold front. Not sure of the exact location of the Huntington Beach WD6AWP thermometer but it seems awfully crazy to assume anything about anything about thermometers and anything less than a handful of degrees. Yeah it was hot, the thermometer confirmed it so you might think of finding a cool place to sit. Is it good for anything else? I doubt it.

Walt D.
July 9, 2018 8:02 am

The area of the LA Basin is 1688 square miles. How many weather station locations are there?
It would seem that for electricity consumption the average temperature would be more important than the temperature at Burbank Airport or downtown LA.
Was electricity consumption in Southern California also at an all time record?
As is always the case, the Global Climate Change Brigade always looks for LOCAL extremes AFTER THE FACT.
If these extreme weather conditions are caused entirely by CO2 emissions, why is there such a drastic change from day to day?

Reply to  Walt D.
July 10, 2018 8:48 pm

CAISO shows peak load as 45,270 MW at 5 pm on Friday July 6th. The record is 50,270 on July 24th 2006.

July 9, 2018 8:36 am

FWIW: The closest USCRN stations recorded these max temps around 3pm on Friday 2018/7/6.

Santa Barbara (north of LA & coastal) : 31.6C (88.9F)
Fallbrook (south of LA, inland of San Diego) : 45.4C (113.7F)

The Fallbrook temp is the highest it has ever recorded (from a quick manual check) but that is since mid 2008 only.

July 9, 2018 8:57 am

In addition . .

This heat wave not much different than many other short term heat waves in SE Cal and Los Angeles. Take this one:

Well, it was close – Fri and Sat set record high temps – 108 and 104 respectively – for Los Angeles for the day; however, the record high temp for the month of July still stands. That was back in July, 1891 – long before there was any ‘man-made’ global warming or Urban Heat Island Effect which can add 4-6 degrees F to the natural temperatures in this massive sprawling metropolitan area.

July 24, 1891 – 103
July 25, 1891 – 109 – Still standing as the all time record high for the month of July.
July 26, 1891 – 102

Interestingly enough, there are still 5 July high temp records still standing which were set in the late 1800’s. Darn horse farts.

It’s quite possible that 4-6 degrees of Saturday’s 108 record high was because of the UHIF. Adjusting for that might actually leave the high at roughly 104. Certainly the UHIF added to the temperature. FTR – the UHIF, according to our EPA, can cause night time temps to remain up to 20 F warmer in a metropolitan city, than in the surrounding natural setting of a rural countryside area.

And now – we see that there is probably even more fake heat in these newly set daily records.

Thanks Tony – great information to have

July 9, 2018 9:15 am

Surface temperature is a human invention. In terms of exactness within a degree or so, it is a very site-specific measurement.

Think about what standardizing something that usually would be a very site-specific measurement means: You have to have an ideal height to place the measuring device. You have to have an ideal surface on which to place the device. You have to have ideal surroundings. You have to have all these imposed conditions that exist ONLY because humans arrange for these conditions to be imposed.

Within a few degrees, then, the whole concept of a surface temperature is like a mythical creature — something that is staged and painstakingly measured in an exact, ideal way.

What about temperatures ABOVE the ideal height ? … temperatures BELOW the ideal height ? … temperatures near VARIOUS surfaces and surroundings ? These are all valid measures too for ALL THE REST of Earth’s atmosphere.. And yet, we focus on this ideal height, ideal location, ideal surrounding mythical contrivance of a standard that cannot possibly relate to the real world, within the small range of a few degrees over which the experts in this area make all the big fuss.

July 9, 2018 9:45 am

It would be more efficient if they place a surface temperature station on top of the LAT building and hit it with studio lights with live action reporting on the roof.

Janet L. Chennault
July 9, 2018 9:49 am

You may disqualify at will, but I live on the rural outskirts of LA and it is easy for me to believe that the temp was 113-114. I have been in Arizona when the temps were that high, and the temp on Friday had that same ‘stepped right into the oven’ feel to it.

I have no data, just subjective experience: I cannot experientially exclude the assertion that the temp was gawdalmintyhigh.

Jan, sweating to even think about it

Pierre Charles
Reply to  Janet L. Chennault
July 9, 2018 10:10 am

It would be nice to know what a good reading was. I happened to be visiting LA/Burbank Friday through Sunday and i thought I had landed in Phoenix or Las Vegas. Anthony’s point about urban heat islands just keep getting more poignant – as this was my first visit in 17 years, it became readily apparent LA sprawl keeps on growing further into the hills, with more fires.

Reply to  Janet L. Chennault
July 9, 2018 5:40 pm

Anthony’s point is that temperature growth is due to factors other than atmospheric CO2. Growth is regional and due to urban growth of heat retaining structures. Temperature growth is not global, it is regional (until human occupied regions begin to influence greater and greater areas of land).

Bryan A
July 9, 2018 10:04 am

Here’s the USC weather station that had ‘all time record high’ surrounded by cars and asphalt. I wonder what it looked like when original record was set?

Google Earth does have an available OH Walk back in time to 1989
In 1994 there were no Tennis Courts to the Northeast, it was all trees and grass.
Between 1994 and 2003, the grass and trees were removed for the new additional Tennis Courts
Between 2008 and 2009 a large hedge was planted in the grassy area directly north of the sensors effectively creating a wind block. The 11/2009 image also indicated that the Coop is subject to Shade from rather large trees to the west and southwest.
Looking from street-side today, nearly the entire pad is surrounded by 4′ high bushes effectively creating a stagnant air zone. (could this also serve to artificially raise the temperature?)

July 9, 2018 10:15 am

I live in Santa Ana, and now I finally know why my weather apps don’t match any thermometers around my house or in my car! THANK YOU!

They are frequently off, by up to 10 degrees!
I have even complained to the weather channel and asked them what source they were using, because it’s so untrustworthy (Apple app seems to source from the the same data).
No answer, of course…

The hotter it gets, the more skewed the data gets. I was in Palm Springs for the last heat wave… thank goodness! No air conditioning back at home. The apps said 118 and I believed it. Felt like I was on Venus outside! But no thermometers here to check.

July 9, 2018 10:24 am

Weather stations at airports are designed to offer information that is helpful to ‘local ‘ flight movements , while the airport environment may not be typical area it will have lots of open areas of hard-standing and jet wash that can add to the local heat environment .
Let us be clear , they are not used because they offer good data for a greater environment, they are used because ‘they are there and better than nothing’
In the good old days before ‘settled science’ these issues existed but where not considered significant because its all a bit hit and miss anyway .
All that has occurred is that the problems have remained , but now there is need to claim great accuracy to prove ‘settled science ‘

July 9, 2018 10:30 am

Linked by DailyCaller article

Which is on the Drudge front page today.

July 9, 2018 11:58 am

What if we used cemeteries as place to get accurate city readings?

Bryan A
Reply to  Tom
July 9, 2018 2:33 pm

A great place to plant all those dead sensors

July 9, 2018 1:15 pm

A nice way for a layman to consider the heat from auto exhaust in an urban environment. Consider a car getting 30 mpg at 60 mph. It would be burning 2 gph (gal per hour). Now freeze frame the autos on the highway and consider if every one of them were to burn 2 gal of gasoline in place over a one hour period. It would have an effect on the immediate surrounding air temp.

Now consider the paved/concrete surfaces and roof top surfaces. I measured it. It’s now 4:00 pm EDT, sunny, and air temp is now 87 F and a 6 mph breeze. Last nights low ambient temp was 55 F. My blacktop driveway is now 146 F, the concrete walkway is 131 F, the hood of my vehicle is 159 F, and the grass is 91 F. The sunny side of my brick house will reach over 140 F if I don’t water it. That is some real-time data of passive urban heat. If last nights low temp had have been 20 F warmer (75 F) the measurements may have been greater with perhaps the exception of the grass and car hood.

The exhaust air from an A/C compressor condensing coil is really hot and depending on the system/conditions will often be 180 – 200 F or more.

The localized heating will escape via radiation, conduction, and convection but it has a short term localized effect.

Think about it for a minute. If one can’t see the effect of these urban heat sources then they are an idiot.

Reply to  eyesonu
July 9, 2018 5:36 pm

see my post above…..I measured a 9F difference between a stopped traffic jam and open and free flowing traffic about a half mile further on.

Reply to  eyesonu
July 10, 2018 11:27 am

Urban heat report # 2 (one day later and 2 hours earlier in the day but hazy and partly cloudy):

Now consider the paved/concrete surfaces and roof top surfaces. I measured it. It’s now 2:00 pm EDT, hazy and partly cloudy, and air temp is now 87 F and a 7 mph breeze. Last nights low ambient temp was 66 F. My blacktop driveway is now 147 F, the concrete walkway is 137 F, the hood of my vehicle is 179 F, and the grass is 98 F. This is some real-time data of passive urban heat.

Robert Osborn
July 9, 2018 1:19 pm

Its amazing that nobody gets that record daily high temperatures is a better indicator of fewer greenhouse gases than more.

Peter D. Tillman
July 9, 2018 1:53 pm

Keep up the good fight, Anthony. Science self-corrects (eventually) — but only if scientists have the courage to point out the bullshit passing for “science”.

July 9, 2018 5:58 pm

Caused by geoengineering

July 9, 2018 7:16 pm

Nick Stokes is an experienced mathematical scientist with access to the large CSIRO research organisation. His scientific comments on WUWT are usually correct, or if doubtful, at least pertinent. WUWT is a blog that has much opinion and Nick tends to keep clear of opinion. Is it bad for a scientist to do that?
Nick has set up a blog at moyhu, see I have visited there. Has anyone else?
If you seek to thrash out matters with Nick, you need to arm yourself with similar scientific artillery, because his blog is mostly to facilitate the presentation of official data, which is not a bad endeavour. How many WUWT bloggers have created blogs to match this? I have not, I am nearly 80, with health problems, but I have done quite a lot of calculation and deduction off blog (sometimes posting on Jo Nova’s, a couple of times on WUWT).
Where Nick has caused niggles, it is usually from his reluctance to call out doubtful or bad practices and opinions that need to be aired as a prelude to official correction. Maybe Nick does not want to be too involved in opinion. I do not either, but given the Establishment’s repression of dissenting opinion, I have to be. As do most bloggers here. We do not have a CSIRO behind us.
Anthony, my friend, please don’t be too harsh on Nick because he won’t easily join into the opinion game. You have done marvellous work with your dedication to the WUWT blog. You might find it fruitful to promote among your readers the need for a ‘sceptical’ blog to counter Nick’s mathematical moyhu blog. It is needed, but it is too much for you to take on, I guess.
The main pity is that Establishment figures, with their settled science attitudes, have tried so hard to downplay the efforts of citizens whose opinions challenge theirs. I’m tired of being treated like crap by our BOM. I hate disputes. Let’s try with a new, dedicated, global blog with only science to challenge theirs, as a complement to WUWT’s present efforts.
And Nick, you might consider keeping quiet when matters of bad science are raised, rather than taking portions of the topic for neutral comment, giving the impression that you are endorsing poor science. I do not think you would endorse poor science, but many WUWT readers might think you do. Geoff.

Philip Schaeffer
Reply to  Geoff Sherrington
July 9, 2018 9:45 pm

Bad stations are certainly a real thing. My impression of what is happening here between Anthony and Nick is something like this:

Anthony (and some other people) compared the results for all US stations with the results from only very good stations. They found a difference in the tend.

OK, fair enough. But that was a comparison against ALL stations, not just the ones that actually are used by most climate scientists. (please correct me if I’ve misunderstood that)

Then we get articles from Anthony pointing out bad stations.

When nick says “well, that station is ranked as a poor station and isn’t used or isn’t likely to be used in the records that most scientists actually use”

Which elicits an angry response claiming that Nick doesn’t care about measurement accuracy. Like this from the all time record temp for LA discussion:


““then NASA GlSS etc”
The USC station is in GHCN Monthly because it is a long term record, and so it is recorded by GISS. Burbank has not been there since 1966. Van Nuyts, Santa Ana are not in GHCN-M at all. And GHCN is what climate scientists mostly use. GISS just passes along information from GHCN (except for their UHI treatment).


“So effing what Nick? The point is the DATA IS CORRUPTED AND BIASED. But you can’t bring yourself to admit that. You aren’t an honest researcher. Your own bias blinds you.

These stations get used in homogenization, and their errors collectively bias the entire climatic record upward.

Truly Nick doesn’t give a damn about accuracy in data collection. He’s a paid troll.

I’m really done with you. Go away.”

Well, my question is, what difference in trend is there between only ideal sites when compared to the sites that actually get used, rather that just comparing against all sites that get recorded? Does Nick have a point? Or are these bad sites widely enough used for calculations that make a significant difference to the reported trend, to really bias the record upwards?

Is the same difference in the trend between ideal sites and all sites still preset in the records that are actually used, that don’t use all sites?

“Yeah, but the media uses them!!”

Nick isn’t the media. He’s a scientist. He cares about what actually gets used to do science.

How can you prevent the media from being stupid? Refuse to collect information from sites that may be compromised? How are you going to study UHI if you do that?

July 9, 2018 9:25 pm

Still waiting for Watts to put up his UHI paper for peer-review, which he promised he would do.

Reply to  Fred
July 10, 2018 11:01 am


Now’s an opportunity for you to ‘peer’ review the ones in this post. Here is another one you can include: USHCN temperature sensor at Napa State Hospital, Napa, CA. That one is in another WUWT post released today.

Stop waiting and tell us what you really think. Be a reviewer today. Do it NOW.

Another Scott
July 9, 2018 11:06 pm

Anthony should keep up the posts about ridiculously sited weather stations used for official data. Is it really such a bad thing to raise people’s awareness about the issue? Would it be so bad to guilt the NWS into improving their station siting and data collecting quality?

July 10, 2018 12:40 am

Andy: Is there a weather station in Griffith Park, a 6+ square mile park in the middle of the LA basin? If I were looking for a well-site location in LA, it would be a good place to look.

FWIW, a record at a biased site IS a record – for THAT particular biased site. If jet wash temporarily effected a the Van Nuys reading, the same thing could have happened during any of several hundred unusually hot days in the last decade. It is CHANGING BIAS that makes new records meaningless: an expanded heat-absorbing runaway, more planes creating more chances to obtain a perturbed reading, etc.

John of Magnolia Park
July 10, 2018 6:30 am

I live 2 miles south of the Burbank Airport in a neighborhood of trees. I have my thermometer , old mercury style, nailed to the bark of my hundred foot Canary Island Pine, which is in the shade. It always runs one to three degrees under the Airport temperatures . The Airport is a guide. In winter time, I use my bird bath to see when it gets to freezing. I also compare the readings at the Weather Underground sites. Friday, July 6th, was very hot here. That was Texas heat. My Deodar Cedar tree even got burned needles, not to mention the Camellia leaves. The heat was truly devastating. The heat over 110 degrees lasted for many hours. The squirrels and birds were very uncomfortable. When the inside of my house got to 89 degrees, I turned on the centralized air. Usually, it cools off at night, so I don’t use the A/C much during the year. Sometimes I get the sea breeze through the Cahuenga pass to keep my area cooler. Burbank does have a number of micro climates.

July 12, 2018 6:40 pm

I’m a little late to this discussion, but let me bring up a point or two… The siting of every one of these weather stations is BAD, like stinks on ice. I want to know how they compare to themselves in previous years? Taken one at a time, and comparing the siting to previous years, have any of the sites degraded? Are they even worse for recording temperatures then they were in previous years? Does UHI have a stabalization time? Does all that surrounding concrete get hotter and hotter over the years, even if it were to get exactly the same amount of solar insolation, with the same winds, year after year? So (and please don’t shoot me for saying this, Anthony) if the site has been constant, even though bad, for a number of years, can’t we say that each individual site has set a record for the day, at least? Maybe an all-time high for that station? I would certainly agree that none of these sites are fit for the purpose of proving that the entire Los Angeles Valley has set an “all-time high”, they clearly CAN’T show that since their siting is so bad. But if all else remains constant, and there are no idling ice-cream trucks around, doesn’t that reading stand as a record for that station?