Ouargla, Africa – Washington Post promotes another potentially bogus “all time high” temperature record

From the “anything hot goes” department and the Washington Post’s Capital Weather Gang comes this pronouncement of an all-time high temperature record that may be little more than wishful thinking, much like the recent all time high in Scotland that turned out to be polluted by an idling vehicle producing hot exhaust near the temperature sensor.

It started with this tweet Friday 07/06/18: (h/t to Mike Bastasch of the Daily Caller).

The WaPo article says:

Africa may have witnessed its all-time hottest temperature Thursday: 124 degrees in Algeria

The planet’s hottest continent probably just endured its hottest weather ever reliably measured.

An Algerian city soared to 124.3 degrees (51.3 Celsius) Thursday, adding to the onslaught of records for extreme heat set around the planet during the past 10 days.

The blistering-hot temperature reading, observed in Ouargla, is probably the highest temperature ever reliably measured both in Algeria and in all of Africa. The record was first identified by weather records expert Maximiliano Herrera.

Ouargla, with a population of nearly half a million, is located in north central Algeria, roughly midway between Morocco and Tunisia.

Location of Ouargla, Algeria, indicated by red marker. (Google)

Its 124.3-degree temperature surpassed Africa’s previous highest reliable temperature measurement of 123.3 degrees (50.7 Celsius) set July 13, 1961, in Morocco.

First, the keyword here is “reliable”. More on that below.

Second, the record is unverified as of this time. While the Synop data and data captured by Weather Underground both say it reached 124.3F (51.3 C) Thursday afternoon likely between 3PM and 6PM local time, it seems that even though this claimed record is being built up by WaPo as “big news” it has some real problems with it much like the rejected Scottish all-time temperature record.

Here’s the SYNOP report, note the 51.3C reading:

Note that the 51.3C Tmax reading doesn’t show what time it occurred, but we can surmise based on surrounding data, likely sometime between 3PM and 6PM local time. Note also the winds during that period.

In the case of the Scottish record, the Met Office in the UK investigated and said:

“At first review the Motherwell record appeared plausible given the wider conditions on the day and was therefore reported as such. However for all new records we undertake further careful investigation to ensure that the measurement is robust. This investigation includes statistical analysis of the station data, evaluation against neighbouring sites, and in some cases an additional site visit to check for unexpected issues with the instrument enclosure or equipment to ensure the measurement meets our required standards.”

“Unfortunately in this particular instance we have evidence that a stationary vehicle with its engine running was parked too close to the observing enclosure and the Stevenson screen housing the thermometers during the afternoon of 28th June,” the Met Office explained.

“Although the measurement appears plausible given the weather conditions that day we cannot rule out the potential for contamination of the measurement by this non-weather-related factor,” officials wrote.

So, the issue was siting. Turns out it was an Ice Cream Truck parked nearby the station. Temperature was measured in the wrong place where an unexpected bias creeps in.

Third, The Algerian Met Office doesn’t seem interested. In the case of Ouargla you’d think the Algerian Meteorological Office HQ in Algiers would at least have a mention of “probably the highest temperature ever reliably measured both in Algeria and in all of Africa.”…but, they don’t. Either they are unaware, or don’t think it’s meteorologically/climatologically important. What I found below in #5 may be why they aren’t touting it.

Fourth, the thermometer location is at an airport with a large military presence, right next to the tarmac. Based on hours of combing Google Earth and other sources, I have identified what I believe to be the weather station at Ouargla Airport (OGX) now known as Ain Beda airport (ICAO code DAUU). See the captioned photo from Google Earth below: (click to enlarge)

Ouargla Airport (OGX) now known as Ain Beda airport (ICAO code DAUU) Location of the terminal and Algerian Air Force Base are marked.

Here’s the closeup of the civilian section of the airport.

Source: https://www.google.com/maps/@31.935836,5.4105054,286m/data=!3m1!1e3

Airports are NOT good places to measure climate change or even record highs/lows. Why? they are dynamic places; jet exhaust, changing infrastructure, and constant energy use. Just look at the small area for the jet above, it has to make a 360 rotation and that spews jet exhaust everywhere.Does it affect the temperature sensor? Who knows for sure without a flight schedule to compare to the temperature record, but if the Met Office can disqualify an all-time high temperature record for an Ice Cream Truck parked nearby spewing exhaust, you’d think meteorological authorities would want to look at whether jet airplanes are doing the very same thing at Ouargla Airport.

Fifth, the airport is under construction at the moment. An extension/expansion of the public terminal facility is happening in 2018 as indicated by this article in 2017:

http://www.elmoudjahid.com/fr/actualites/117511

Translation from French:

https://translate.google.com/translate?sl=fr&tl=en&js=y&prev=_t&hl=en&ie=UTF-8&u=http%3A%2F%2Fwww.elmoudjahid.com%2Ffr%2Factualites%2F117511&edit-text=

A project to extend the terminal of Ain El Beida airport in Ouargla will be launched in 2018, according to the director of transport of the wilaya. The technical studies relating to this operation have been completed and work will start in the course of next year…

So for all we know, since we have no Google Earth imagery past March 2018, the airport may be torn asunder, darkened earth may be exposed, changing the albedo, and therefore the ground influenced air temperature in full sun, or the thermometer may be moved and compromised in other ways. We won’t know until we get some on-the-scene photos.

Sixth, based on the location of the AWS (automated Weather Station) temperature sensor in March 2018 and wind data, the all-time African high temperature record may be a product of poor placement, wind, and heat transport (or jet exhaust).

I spent several hours trying to locate the temperature sensor. There were several possible candidates, and I’ve narrowed it down to one. Unfortunately, since Ouargla Airport  is not a popular destination, and because there’s little ground photography available (likely due to the military base presence) I’ve had to rely on Google Earth only. Here’s what I found as the likely candidate:

Ouargla airport – best candidate for the automated weather station. Click to enlarge.

 

Here is a close-up view:

I looked at all sorts of structures and identified them, ILS radio towers, communication towers, floodlight poles, wind tees, wind socks, etc. and this small fenced in tower near the approach of runway 20 is the only structure that makes sense for the following reasons:

  1. It’s near the terminal and admin building – shorter wiring distances to where the data is needed.
  2. It’s a public facility, with public reporting of weather data, not a military weather station, so it makes sense it would be closer to the public area.
  3. It is positioned in the runway approach area and is fenced in to keep people away. AWS are used for runway conditions, not climate, so makes sense where it is placed and fenced.
  4. The tower is about the right height for an AWS, typically 10 meters (30 feet) for the anemometer/windvane, and the temperature sensors are almost always close to that sort of tower because they want all the readings at the same place.
  5. Nothing else I observed in the entire area fits the bill for an AWS tower. Most all others are too tall.

So let’s assume that marker is the location of the AWS.

According to the SYNOP report, when the high temperature was set, it likely happened between 3 and 6PM local time based on other hourly Tmax data:

We can narrow the likely time of the 124.3F/51.3C Tmax down further with archived data from Weather Underground:

Note that at 2PM the temperature was gown down, but at 3PM it hit 122F (49.9C) and at the same time there was a wind shift to the WSW SSW with average wind of 15mph. 3PM is also about the time to expect peak solar insolation for that location, which leads to maximum ground heating.

Assuming I have the AWS temperature sensor placement right, guess what is upwind of the AWS when the wind is coming from the WSW SSW?

That’s right, a big slab of asphalt tarmac and a big source of jet exhaust as seen below with my annotated Google Earth image:

One thing is for certain, with that wind direction, there was most certainly heat transport toward the AWS from the tarmac and terminal. I don’t know if there was a jet plane present and taxiing at that time or not, but if there was, the jetwash would add to the heat transport.

I believe that the Ouargla “all time African high temperature record” is based on artificial heating sources and heat transport by wind at the opportune moment and best direction for heat transport from the airport tarmac and/or jetwash.

I also submit it has NOTHING to do with global warming/climate change but is little more than a combination of a warmer than normal meteorological synoptic-scale event for the region, combined with poor thermometer placement and a wind driven heat transport event.

In my view, this temperature record should be disqualified as being influenced by man-made objects, just like the Ice Cream truck parked next to the weather station in Scotland.

I welcome comments, and if anyone can get an “on the ground” confirmation of my theory, such as photos or videos, please share it in comments.

One final note. NASA GISS uses this station as part of the GHCN (Global Historical Climate Network) data provided by NOAA. After looking at the fractured record, and the above scenario, any sensible person would ask WHY?

Moral of this story: We shouldn’t rely on airport weather stations for anything to do with climate records. They are placed for aviation purposes, not for climate purposes, and are active energy sources, heat sinks, and unnatural/artificial terrain that is unrepresentative of the area’s climate.

UPDATE: A day after this post was published, a typo was noticed in the wind direction in the text (should have been SSW, not WSW) and was corrected in both the post body and the image with wind direction. The typo doesn’t change the conclusions of the essay.

 

 

 

 

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Michael Goodman
July 7, 2018 1:02 am

It’s also NOT a record. Neighboring Libya has reported temperatures of up to 136.4 F !

Reply to  Michael Goodman
July 7, 2018 1:37 am

I’ve been in Upper Egypt at 50C during the summer – not that unusual, and not near an airport.

Editor
Reply to  Michael Goodman
July 7, 2018 5:20 am

IIRC, that Libyan record was withdrawn decades after it was reported. Apparently the substitute observer read the wrong end of bars that record the max/min temperature.

I’ll hunt down the WUWT post in a bit.

Chris
Reply to  Ric Werme
July 7, 2018 3:47 pm

The September 1922 record of 56c has been shown to be unreliable, but I think temperatures of 52 or so have been recorded at this station in July and sugust

Tom in Florida
Reply to  Michael Goodman
July 7, 2018 5:34 am

It’s all just a bunch of hot air anyway.

Editor
Reply to  Michael Goodman
July 7, 2018 5:37 am

Here ’tis. Ironically, courtesy of Jeff Masters.

https://wattsupwiththat.com/2012/09/13/dr-jeff-masters-shows-why-siting-matters-death-valley-steals-all-time-temperature-record-from-libya/

Today, the official arbiter of Earth’s weather records, the World Meteorological Organization (WMO), announced that the all-time heat record held for exactly 90 years by El Azizia in Libya “is invalid because of an error in recording the temperature.” The WMO committee found five major problems with the measurement.

Most seriously, the temperature was measured in a paved courtyard over a black, asphalt-like material by a new and inexperienced observer, not trained in the use of an unsuitable replacement instrument that could be easily misread.

The observer improperly recorded the observation, which was consequently in error by about 7°C (12.6°F.) The new official highest hottest place on the planet is now Death Valley, California. A remarkable high temperature of 56.7°C (134°F) was measured there on 10 July 1913, at Greenland Ranch.

That post continues on with a 2002 essay by John Daly about other attempts to discredit long standing high temperature records, focusing on efforts at Death Valley.

I’ve never heard of an attempt to discredit old cold temperature records.

Gunga Din
Reply to  Ric Werme
July 7, 2018 6:06 am

I seems that if he read the wrong end of the for the high temp then he would have done the same for the low temp.
I wonder if there’s any evidence of that?

commieBob
Reply to  Gunga Din
July 7, 2018 7:03 am

Working in an extreme environment drastically increases the chances of human error. That said, most other sources of error would be on the high side. I can’t think of something that would make a properly calibrated thermometer or sensor read low.

Editor
Reply to  Gunga Din
July 7, 2018 8:22 am

Check out the AMS paper at https://journals.ametsoc.org/doi/pdf/10.1175/BAMS-D-12-00093.1 . You can zoom in on the ledger page and read the data, a fine feature. The min temperature, read at the wrong end of the bar, would also be 7° low, the text seems fairly willing to accept the data that was recorded. The max/min thermometer was not the typical NWS pair used in the US, but one with a U-shaped tube. Given other errors, like using the wrong columns for max and min, the authors conclude operator inexperience (I’d add inattention). I wouldn’t expect consistency in making errors.

The paper, obviously, focuses on the high temperature, but it does note

In addition, beginning on 11 September 1922, the maximum temperature readings increase dramatically, while the minimums continue more or less within range.

So perhaps the mins were recorded accurately.

Also, while it’s not an airport, the observing site is questionable:

As noted by Fántoli (1954, 1958), the temperature observations were made over a concrete-coated plaza of a small military fort on a hill. The plaza coating of tarred concrete could accentuate surface heating beyond the norms for a natural desert environment.

After the instrument shelter in El Azizia was relocated in 1927, only two other temperature readings above 50°C (in the ensuing 48 yr of record) were measured at the site.

Gunga din
Reply to  Ric Werme
July 7, 2018 11:56 am

Thanks.

Bill Murphy
Reply to  Ric Werme
July 7, 2018 4:00 pm

RE: “I’ve never heard of an attempt to discredit old cold temperature records.”

There were anecdotal reports here a few years ago that recent record lows at Amundsen–Scott South Pole Station were adjusted upwards by BEST because they were not believed based on temps at McMurdo Station. McMurdo is at sea level on the coast while Amundsen–Scott is well inland on the ice at over 9000 feet. There have also been anecdotal reports that observers in the colder areas of Russia during the old Soviet days would routinely fudge temp records down because heating oil there was rationed based on temperature. I have no idea if these reports are true or not, but if they are and if the old Soviet era records are included in the global average temp calculations (Amundsen–Scott is) the net effect would be to increase the apparent warming since Siberia would have actually been warmer than reported in the 50’s-60’s and Amundsen–Scott would be colder recently than reported.

commieBob
Reply to  Michael Goodman
July 7, 2018 6:55 am

I don’t think they are talking about world records. They’re talking about record temperatures at a particular location.

Reply to  Michael Goodman
July 7, 2018 8:45 am

Even if it was a record,
what does carbon dioxide
have to do with daytime temperatures,
since it is invisible to sunlight?

Also, if you ignore the fact that real time
average temperature data do not exist
for 99.999% of Earth’s history,
the few real time measurements we have
are all DURING a warming trend that
started about 1850, so new records are
to be expected, and are not news,
and will continue,
until that warming trend ends,
and a new long-term cooling trend begins.

If the warming trend since 1940 was caused by CO2,
I’d expect to see warmer nights, especially
in the Arctic and Antarctica — the tropics
should have the least effect.

“all time African high temperature record”
makes no sense, since most of Africa has
no thermometers so the numbers
are wild guessed by government bureaucrats —
in fact, most of our planet has no thermometers,
so there is more wild guess infilling
than actual measurements,
and those measurements
get adjusted more than once too !

Only a fool, or a leftist (I repeat myself)
would consider the surface temperature “data”
good enough for real science.

My climate change blog,
featuring real science (us)
and political science (them)
in simple language:
http://www.elOnionBloggle.Blogspot.com

Kristi Silber
Reply to  Richard Greene
July 7, 2018 11:50 pm

‘Even if it was a record,
what does carbon dioxide
have to do with daytime temperatures,
since it is invisible to sunlight?”

Good one! Made me laugh.

Reply to  Kristi Silber
July 8, 2018 10:34 am

Glad you are laughing Silber,
because everyone here laughs
at your minimal knowledge of climate science.

You could be somewhat effective
at this website, trying to
refute skeptics, if you bothered
to learn a little about climate science!

For you, “climate science” is whatever
government bureaucrats say,
and whatever they predict.

They are government bureaucrats,
so they couldn’t be wrong!

And they couldn’t be scaremongering
for permanent job security!

Observations from the last fifty years
show that the nights
have been warming much faster
than the days.

The layer of air just above the ground
is known as the boundary-layer.

At night this layer is very thin,
just a few hundred meters.

During the day it grows to a few kilometres.

It is this boundary-layer depth
which makes the night temperatures
much more sensitive to warming than the day.

At night there is a much smaller volume of air
in the boundary layer that gets warmed.

That leads to much greater warming at night
than during the day,
when measured near the ground.

The number of extremely cold nights
has dropped by half
during the last fifty years.

The IPCC’s (your hero) even admits
that simulation of the
nighttime boundary layer depth
needs a lot more work.

Kristi Silber
Reply to  Richard Greene
July 8, 2018 3:09 pm

Why would anyone listen to government bureaucrats for their information about climate science?

As I understand it (in a nutshell), sunlight hits the Earth, warms it, and the heat radiates back into space. Because the GHGs (principally water vapor, CO2 and methane) absorb and emit long-wave radiation, the heat from the Earth is partially trapped by the atmosphere. Daytime (and nighttime) temperatures are affected by the GHGs and the strength of the radiation from the sun (a function of the distance between the sun and Earth, the angle of the sun’s rays when they hit the Earth, cloud cover and the sun’s activity). I’m leaving a lot of the details out here, but let me know if I’m mistaken here (unless you think AGW is wrong – in that case, don’t bother). Assuming I’m right, I fail to see why CO2 wouldn’t affect daytime temperatures.

“Also, if you ignore the fact that real time
average temperature data do not exist
for 99.999% of Earth’s history,
the few real time measurements we have
are all DURING a warming trend that
started about 1850, so new records are
to be expected, and are not news,
and will continue,
until that warming trend ends,
and a new long-term cooling trend begins.”

What do you mean by “real time”? The instrument record? Do you believe proxy measurements are not representative of temperature change? I suspect (but don’t assert) that a warming trend beginning in the 19th C could have been partly a product of deforestation and subsequent burning.

“most of Africa has
no thermometers so the numbers
are wild guessed by government bureaucrats —
in fact, most of our planet has no thermometers,
so there is more wild guess infilling
than actual measurements,
and those measurements
get adjusted more than once too !”

Infilling of temperatures is not a matter of guessing, it’s done statistically. Imperfect yes, but nothing like guessing. Sure, measurements are adjusted! It would be extremely negligent if they weren’t, since there are known inaccuracies in the record. Again, the problems are (often) found statistically, adjusted statistically and validated statistically. Sometimes the adjustments are checked by an independent group. When there was all the hubbub about the adjustments made by Karl et al., contrarian scientists agreed that if Berkley Earth reanalyzed the data and found that it was kosher they would accept it, but that didn’t stop skeptics from their accusations of fraud. Nor do skeptics care that the methods used by McKitrick and McIntyre have been shown to have greater problems than the Mann et al. paper they were *trying* to damage. It is this kind of blatant bias and lack of scientific integrity and professionalism that I find a major weakness in the credibility of the skeptic position in general. Given my inability to analyze most results of climate research personally, bias and credibility are important factors. ALL scientists are subject to bias. The question is how much it affects their research and conclusions, and how those conclusions are conveyed to the public.

You are right, Richard, that I am no expert in climate science. I know far less than some others here, and have never hidden that fact. I understand that people may laugh at me – fortunately I can laugh at myself, too, upon learning of my blunders. However, this is a matter of knowledge, and it doesn’t always take knowledge in order to identify errors in reasoning, which is what I generally try to concentrate on. I also know something about the practice and philosophy of science, and a bit about statistics – enough to realize that they are often abused around here.

I love to learn. I know very little about the boundary layer, and appreciate you bringing it up. It was a prod to learn a bit more.

I don’t appreciate Us vs. Them mentality, insipid suggestions that mental acuity is a function of partisan leanings, or insulting assumptions about me, my beliefs and background.

Reply to  Kristi Silber
July 9, 2018 7:43 am

Kristi
After reading your long serious reply,
I now feel guilty about any
character attacks I may have
hurled in your direction
in past comments.

I would have understood if you had responded
by writing “Up you nose with a rubber hose!”

I also looked over my prior comments
and realized a mistake that might
have set you off — Global warming
since 1975 has been large at night
and small in the daytime — I should
not have said there was no warming in
the daytime.

I’m not sure anyone really knows why,
but I posted an article on the subject
today at my climate blog:
http://www.elOnionBloggle.Blogspot.com

You wrote:
“Infilling of temperatures is not a matter of guessing, it’s done statistically.”

Infilling can not be verified or falsified.
That’s not real science.
It is also done by the same people
who predict a lot of global warming,
and would prefer their predictions to come true!
It is also done by bureaucrats whose job security
depends on the continuing belief
in a coming climate crisis.
.
.
You also wrote:
“I am no expert in climate science.”

I have been reading about climate science
as a hobby since 1997. It is mainly politics
and very little real science. Wild guess
predictions of the future climate are
not real science — especially wrong predictions.

If I ever find a real expert
in climate science,
who really knows what causes
climate change,
I’ll let you know.

For three decades government bureaucrat
scientists have been claiming that
4.5 billion years of natural climate change
suddenly (almost) stopped around 1940,
and with no explanation ever given,
and we were told that humans became
the climate (average temperature) ‘controller’
since 1940.

That made no sense to me in 1997,
and still doesn’t.

You also wrote:
“I don’t appreciate Us vs. Them mentality, insipid suggestions that mental acuity is a function of partisan leanings, or insulting assumptions about me, my beliefs and background.”

Welcome to world of climate skeptics
where we face harsh character attacks,
and my own posts on pro-global warming
websites disappear within one day.
You should be thankful this website
allows you to comment without censorship!

Kristi Silber
Reply to  Richard Greene
July 10, 2018 7:05 pm

“You should be thankful this website
allows you to comment without censorship!”

I am.

Thank you. You don’t have to feel guilty, though. I can come off poorly myself and make generalizations and assumptions that aren’t correct. I’m trying to do better and be more diplomatic. We’re all human!

Reply to  Kristi Silber
July 12, 2018 7:08 am

You have now come across as a very humble
and likable person — so if you ever make
a comment here in the future that I believe
is completely wrong, and I want to call
you a stupid-head … I’m just not going
to be able to do that, which is
very disappointing.
(heh, heh)

ralfellis
July 7, 2018 1:10 am

Looks like they went for a extended shisha-hooka smoke in 1970. Suddenly in 1997 they woke up to the fact that there was money to be made in higher temperatures, and so they bumped up the readings by 2 degrees. Baksheesh, baksheesh….

A C Osborn
July 7, 2018 1:11 am

And subject to continuous expansion & development.

Lawrence Todd
July 7, 2018 1:25 am

The larger the number of missing data points allows the software to insert more fictitious temperature readings into the calculations which are biased to show global warming.

Lawrence Todd
July 7, 2018 1:29 am

The use of temperature readings placed at airports show that airports are increasing in size, number of passengers and use of jet engines. They have nothing to do with global temperature.

Non Nomen
July 7, 2018 1:39 am

As far as I could check on flightradar24, there were arrivals and departures on 05. Jul. 18, but they do not fit into the time slot around 15:00 lt. These were civilian flights, but the military might have had aircraft operating during that period.

dodgy geezer
Reply to  Non Nomen
July 7, 2018 6:49 am

Someone might have had a jet idling at any time of the day – they don’t need to intend to take off. Testing and maintenance are ongoing occupations…

Non Nomen
Reply to  dodgy geezer
July 7, 2018 9:10 am

Absolutely. No matter what was going on, the Algerian military won’t tell. They are said to be awfully particular.

Poor Richard, retrocrank
July 7, 2018 1:59 am

Time to display my ignorance . . . is there a list somewhere of “Gold Standard” weather stations . . . ones that are least likely to deliver contaminated results? Preferably, too, that they have decades and decades of records that can be examined?

Patrick MJD
July 7, 2018 2:04 am

Nick Stoke will be along to say there is nothing to see here, move along in 3…2…1!

Marcus
Reply to  Patrick MJD
July 7, 2018 5:30 am

AACK !! You were off by 20 minutes !! LOL !

Philip Schaeffer
Reply to  Marcus
July 9, 2018 2:14 am

Exactly what did he say that you object to? All he did was make some distance measurements. Perhaps you think it would be better to consider this issue without knowing such things?

Patrick MJD
Reply to  Philip Schaeffer
July 10, 2018 12:13 am

Nick always come along as states that these are outliers and are not in various datasets. It’s not the point. The point is the MEDIA reports them and people believe the reports whether it is relevant to the climate debate or not. Nick is ALWAYS on the side of alarmism.

Philip Schaeffer
Reply to  Patrick MJD
July 10, 2018 12:44 am

Nick isn’t the media. He doesn’t do his science with media reports.

Is he right about these sites being outliers and not in various data sets?

What more do you want from the man than to explain what he thinks and why? Does he have to pass an ideological purity test by yelling loudly about things you don’t like?

SAMURAI
July 7, 2018 2:22 am

We’re in the early stages of a 2-year El Niño cycle, so we’ll be plagued by “hottest temp evaaaaah” headlines during the summer months of 2018 and 2019…

Of course the MSM didn’t report global temperatures dropped the fastest “in recorded history” over the last two years during a double La Niña cycle.

Last winter, many global cold temperature and snowfall records were broken, but were virtually unreported because these didn’t fit the Leftist narrative.

The global temp anomaly is now 0.21C, while the average of CMIP5’s 102 climate model global temp projection is about 1.2C; about 6 times off from reality…

July 7, 2018 2:24 am

Below is a Google Maps version (click to enlarge). I marked with a red ring the point where I thought the marker was placed, though I couldn’t see a structure there. Then with the 10m scale bottom right, I did some pixel arithmetic in Paint (1m = 7.8 pixels on my screen). It seems that the nearest point on the airport tarmac is 92 m away. But that is a taxi area, and it is unlikely planes would come close to that corner. The nearest point on the road was 38 m away. These seem to be not so close. Real distances will be larger, because the photo is not from directly above, and I’m measuring as if it were.

comment image

tty
Reply to  Nick Stokes
July 7, 2018 2:50 am

Or, in other words, it is not up to WMO standard for a Class 1 station (“At more than 100 m from heat sources or reflective surfaces (buildings, concrete surfaces, car parks, etc”). Given the structures to the left it is probably not even a Class 2 station (“At more than 30 m from artificial heat sources or reflective surfaces (buildings, concrete surfaces, car parks, etc.”)), so it is most likely a Class 3 Station “additional estimated uncertainty added by siting up to 1 °C”.

Chad Irby
Reply to  Nick Stokes
July 7, 2018 5:54 am

See those dark rectangles in the lower left corner? Those mark aircraft parking places for doing things like engine runups for testing (note the plane parked on one in one of the photos upthread). That whole area is exactly the sort of place they’d park and move aircraft.

The other thing to remember is that when a jet aircraft is parked, hot plumes of exhaust come out of the back of the engines at a decent speed. Even at idle, there’s a wide swath of hot air that extends back a hundred feet or so, and longer if the throttles are up. I’ve worked on planes in similar areas, and you can feel the heat from at least a hundred yards away, never mind a hundred feet. The buildings wouldn’t block that much of the heat, either – the wind helps push it around and over them.

With a wind boost from that direction, an exhaust plume would saturate the area inside that fence.

Reply to  Chad Irby
July 7, 2018 10:24 am

It is 132 m from the nearest dark rectangle.

tty
Reply to  Nick Stokes
July 7, 2018 11:14 am

Jet exhaust velocity at breakaway thrust (i e the thrust needed to start taxying) for a Boeing 737 is 35 mph (56 kph) 152 meters behind the tail of the aircraft:

http://www.boeing.com/assets/pdf/commercial/airports/acaps/737.pdf

It will of course be greater for a larger aircraft.

Chad Irby
Reply to  Nick Stokes
July 7, 2018 11:47 am

…plus a 15 MPH wind blowing in that direction. Even at idle, you’d feel a good extra dose of heat well past the monitoring station. Jet exhaust is 400C, at least (high-bypass turbine at idle), or even more if they’re doing engine tests or getting ready to taxi.

If more than one plane is running, the temps downwind will be pretty nasty. This is from personal experience on flightlines in the desert (California). I’ve seen 140+ F measured under shade on a flightline when the official temps were around 110 F.

tty
Reply to  Chad Irby
July 7, 2018 11:57 am

Of course that SW wind might well have been jet exhaust. I don’t think an anemometer can smell the jet fuel.

J Mac
Reply to  Nick Stokes
July 7, 2018 8:06 am

Nick stokes the faux flames of AGW…..
What a shameless apologist for slipshod ‘science’.

Next he will tells us the adverse influence of ‘cooling breezes’ from jet engine exhaust will require ‘legitimate upward adjustments’ to the temperature records for this site.

Michael Jankowski
Reply to  J Mac
July 7, 2018 9:46 am

Not too far-fetched. On a recent thread that discussed a 1940s “warming blip” in climate gate emails, he argued the emails were actually discussing a 1940s cooling anomaly.

Mike McMillan
Reply to  Nick Stokes
July 7, 2018 9:42 am

I edited this airport on Wikipedia a couple years ago, but I didn’t have anything on the automatic weather station. I’d go for something a little closer to the runways. The SkyVector chart of the airport will show the current weather reading if you mouseover near the crosshairs.

tty
July 7, 2018 2:38 am

I don’t know how reliable this is, but I heard several years ago from an acquaintance who is a consultant in the oil business (a specialist in directional drilling, no less) and works all over the world, that according to Algerian law public employees are entitled to paid leave from work when the temperature rises above 50 C, and that the Algerian Meteorological Service therefore never reports higher temperatures than 49.9 C.

He also told me that locals at an oil-field in Rub al Khali in Oman had told him that they had once recorded 61 C. The thermometer was in shadow, but he was uncertain how well it was shielded from radiation.

Yirgach
Reply to  tty
July 7, 2018 11:07 am

Wife used to work in Riyadh, they had the same rule. Never reported any temps over 50C, even though it was regularly exceeded.

Greg Cavanagh
Reply to  tty
July 8, 2018 1:37 am

Well isn’t that just stunning. Data corruption due to local laws creating unintended consequences. I bet these aren’t in the data adjustment tables.

Mr GrimNasty
July 7, 2018 2:41 am

Remember Mitribah, Kuwait, 129F July 2016 – hailed as the highest ever NHemi record – now under investigation by WMO.
And Iran, 129F June 2017, surprise surprise – Ahwaz AIRPORT.

When something supports the agenda, facts/truth/doubt/science just don’t matter.

tty
Reply to  Mr GrimNasty
July 7, 2018 5:36 am

129 F isn’t even close to NHemi record unless Death Valley (134 F in 1913) has moved south of the Equator. 129 F at Ahwaz doesn’t feel unlikely though, Khuzistan probably has the hottest weather in Eurasia. It can be very bad, been there.

By the way I’ve seen 130 F on a thermometer in the Mojave in July, but while at the right height and in shadow, it wasn’t in cage, so it was probably affected by radiation.

Mr GrimNasty
Reply to  tty
July 7, 2018 8:18 am

What was claimed – not what I think. I read Heller too! But we are dealing with history revisionists – as many people have noticed, many inconvenient record temperatures of olde, that happily stood for decades, have been revisited in the global warming era, and suddenly been declared invalid (so that new records can be claimed today a cynic would say). The Death Valley excuse is that the thermometer was pelted with hot sand or something – check out all the records on the wiki page for all the excuses, sorry notes. Hell the Australian bureau just assumes all temperatures before 1910 are wrong and ignores them – that saves explaining all that inconvenient heat in the 1800s.

tty
Reply to  Mr GrimNasty
July 7, 2018 11:42 am

Yeah, The late 1890’s was a time of extreme heat and drought in Australia (“The Federation Drought”), now happily abolished.

I expect the 1930’s “Big Drought” in the Midwest will go the same way soon, as the last people who actually lived through it dies off.

Reply to  Mr GrimNasty
July 7, 2018 4:04 pm

“Hell the Australian bureau just assumes all temperatures before 1910 are wrong and ignores them – that saves explaining all that inconvenient heat in the 1800s.”
“now happily abolished”

Quite wrong. Here (click to enlarge, my red line) is the BoM stats page for Bourke, NSW (famously hot):

comment image

Most records (hot and cold) are before 1910. Whether they would stand modern checking is another question. Doubtful there was a Stevenson screen at all.

tty
Reply to  Nick Stokes
July 8, 2018 12:55 am
Reply to  tty
July 8, 2018 2:19 am

“That argument has worn rather thin”

No, you are spreading, as is the comment preceding and the JoNova post, simply demonstrated misinformation. The BoM is not suppressing pre-1910 data. You can get it all through the Climate on Line page, for a huge number of stations, and all their records of extremes are based on that, and include all years for which data was ever available, Stevenson screen or not. Here, through that page, is a complete set of daily max temperatures in Bourke, starting 1871 (I’ve linked to 1872, but you can select other years, and download all years).

Reply to  Mr GrimNasty
July 7, 2018 10:31 am

“now under investigation by WMO”
“facts/truth/doubt/science just don’t matter”
???

Mr GrimNasty
Reply to  Nick Stokes
July 7, 2018 2:11 pm

The unverified ‘record’ was shouted from the rooftops, immediately used for global warming propaganda. The truth – it appears to be a 10 year old weather station, deliberately placed in what was believed to be one of the hottest places in Kuwait, if not the whole N or EHemi. A very similar reading there was previously disallowed for a faulty sensor. Even if the record is validated – it has nothing to do with global warming, just crafty placement of a thermometer at a regular hotspot identified from satellites, with the aim to capture the record. A similar trick has been used in the UK to identify the wettest places, the environment agency then goes and installs a rain gauge, sits back and waits for very high rainfall or hopefully a ‘record’, and then declares rainfall is getting more extreme. No, they are just getting better at targeting and capturing the extreme instances.

Len Jay
July 7, 2018 2:43 am

Lets see now. A weather station in the middle of the Sahara Desert, near a jet airport, in the middle of summer records a high temperature reading. Gosh. If this global warming thing didn’t exist nobody would think that such a reading would merit any comment.

July 7, 2018 2:57 am

And what about the jet exhaust lifting hot dust which flies through the vents and coats the inside of the housing? It would need to radiate for just a few seconds before cooling to cause a small temp
spike, no?

Alan Tomalty
July 7, 2018 3:01 am

Who in the hell cares about ground temperatures? Are we skeptics going to be reduced to chasing after thousands of bogus ground temperatures created by urban heat island effects like ice cream trucks and airplanes? The only temperature record that matters is the UAH satellite dataset.

Bruce Cobb
Reply to  Alan Tomalty
July 7, 2018 5:11 am

The lamestream snooze media need to be called on their alarmist trumpeting of “all-time-high” temperatures. They give the impression to the easily-led, and uninformed that “the planet is heating up”. But each time one of these bogus trumpeted reports gets busted, then it all backfires on them. John Q. may be a bit dumb, but he’s not stupid.

john harmsworth
Reply to  Alan Tomalty
July 7, 2018 12:26 pm

All these record high temperatures occur in association with very low rh. Of course, nobody in this farcical, pretend science cares about actual enthalpy while they pontificate about warmest whenevers, whatevers. It’s all too stupid to bother with.
A massive canard full of opportunists and liars and a few misguided souls like Nick Stokes who can’t stomach asking themselves the
obvious questions

eyesonu
July 7, 2018 3:01 am

For what it’s worth, I checked my blacktop driveway yesterday during a partly cloudy day with an IR thermometer and it read 149 F. Ambient temp was ~ 90 F with 5 – 10 mph winds. Was hot on my bare feet!

eyesonu
Reply to  eyesonu
July 7, 2018 4:03 am

Just a little thought with regards to the radius roof on the assumed aircraft hanger. It is reflecting some of the sun towards the site of the weather station as can be observed from the angle of shadows in the pics. Probably not significant but ….. well … “it contributes to” is a term we’ve all heard before.

Anyway, my aluminum porch awning reflects the sun (both top and the side in the afternoon) and heats the brick up an additional 10 – 15 F over the course of several feet from the awning. Ahh …. the curious wonders of an IR thermometer and a water hose for cooling the side of your house. A little chart to record the measurements and …… well …. soon to measure everything including the dog’s fur!

wsbriggs
Reply to  eyesonu
July 7, 2018 4:41 am

I love citizen science! I’ve lusted after a high quality IR thermometer for years, but it’s just not in the budget. I came thaaaat close to buying a surplus geiger counter a few years back, but other priorities popped up – like just before I ordered it, the refrigerator failed – it was jealousy I’m sure!

eyesonu
Reply to  wsbriggs
July 7, 2018 6:22 am

The IR meter is a neat gadget with practical use. I sure beats the meat thermometer that I used 20 years ago and ladder and holes drilled in brick to measure temp. Have recorded internal brick temps at avg of 145 – 160 F on full sun afternoon. IR meter is a bit more convenient. Water down brick @ about 115 F and a couple more times at 1 hour intervals does the trick. Fabbed 1/2″ pvc w/ small holes to mount house to water but that is now used in garden for irrigation. Need motivation to get more pipe. A few more hot days ‘otta do it!

A decent cheap IR thermometer is available for $40 -$50 online. I usually go for mid-range pricing/quality unless I need pinpoint accuracy in any tools.

Editor
Reply to  eyesonu
July 7, 2018 8:45 am

I’d recommend the Kintrex irt0421 thermometer, but they may be out of business. Beyond that, I’d recommend getting one with good low-end response, as that’s a bit of a challenge to do well and and using it to measure downwelling IR (not really temperature at that point) is very interesting and correlates with water vapor.

See Forrest Mims, et al http://www.instesre.org/GCCE/Mims_and_Chambers_BAMS.pdf

eyesonu
Reply to  Ric Werme
July 7, 2018 3:12 pm

Thanks Ric,

The one I have is a 12/1 cone w/ adjustable emissivity range.
Per your link the Omega OS-425 has a 50/1 cone. It’s quite a bit more expensive but if I had the $$$$$ it may have better suit my ultimate need/desire.

Anyway, when you start playing around with it using calibrated thermometers, thermocouples, and the new toy IR meter ‘ya gotta watch out for the IR in all its forms. They all somewhat agree in the predawn darkness but the neighbors house across the street will mess with ya. There seems to be some effect from the sky as it begins to lighten. I’ll be checking all that out as soon as I get some more aluminum fol.

Yirgach
Reply to  eyesonu
July 7, 2018 5:27 am

Day before it was 96F outside and the GPU on my video card was 135F.
Had to throw another fan on the outside as it has a thermal shutdown at 140F…

Reply to  eyesonu
July 7, 2018 5:30 am

The 2PM and 3PM readings show that it was Mostly Cloudy. Don’t clouds blocking the sun tend to cool temps down during the day?

Shanghai Dan
July 7, 2018 4:55 am

I 100% understand why this record is in the GHCN – it shows a solid 1.2+ deg C heating since 1960! How could you possibly let an increasing record NOT be included in the GHCN? There’s a story to be told, and this just makes it easier!

Yirgach
July 7, 2018 5:20 am

Anthony
A list of arrivals and departures at Ain el Beida Airport is available here:
https://flightaware.com/live/airport/DAUU
You can get a total of 40 for free by registering.

July 7, 2018 5:43 am

Not only WaPo, also Dutch RTL TV weather, it was stated that the old record of 55 °C in Tunisia 1931 was not valid.
comment image

Wekcome to the Ajustocene.

In 2012 the all-time high in Libya of 58 °C in 1922 was already deleted from the records as unreliable.

Gamecock
July 7, 2018 5:44 am

It’s hot in the Sahara Desert. Film at 11.

tty
July 7, 2018 5:53 am

It seems to be difficult to beat the 1913 56 C record from Death Valley. Even though the Death Valley station has been moved downhill to Badwater and sited in a cul-de-sac open to the afternoon sun but surrounded by rocks for maximum irradiation effect.

However satellite measurements of ground temperature shows two areas where these reach 70 C fairly regularly, inland Pilbarra in West Australia and central Dasht-e-Lut desert in Iran. Even though temperatures at 1.5 meter height will be lower due to convection it would seem that these areas would have the best chances of setting a new record. However there is an extreme lack of people and weather stations in both areas. Surely NOAA or CSIRO or somebody could pay for a number of unmanned stations there to generate good scare stories?

Joe Crawford
Reply to  tty
July 7, 2018 8:59 am

I wouldn’t want to give them ideas. They might take you up on your suggestion :<)

Non Nomen
Reply to  tty
July 7, 2018 9:16 am

I’d prefer a Mann’d station.

JCalvertN(UK)
July 7, 2018 6:05 am

It is only 25m from a tall light-blue coloured building with a rather grandiose entrance and palm trees. Given the climate, this will almost certainly be well-equipped with air-conditioners.

It is only 40m from an asphalt dual-carriageway, and only 50m from the very edge of the terminal apron.

Also, I doubt the validity of comparing records from automatic measurements with those from older manual readings.

Owen
July 7, 2018 6:22 am

It should be straight forward to check if there was bias.

Check a nearby temp station

George Daddis
July 7, 2018 6:33 am

It was an all time high for THAT location. (Assuming the reading to be correct).

Isn’t this comparable to Alarmists, politicians, and the media (I repeat myself) touting a “100 year” flood or drought or whatever to the gullible public who naively assume that means such an event would only occur once in 100 years across the entire world?

Of course it is once in a 100 years for THAT “micro” weather reporting zone. We had a “100 year” 12 hour total rainfall several years back when I lived in western NY that caused extensive erosion and property damage to me and my immediate neighbors but most of the other parts of our small county only got wet.

I don’t know how many of those weather zones exist in the world or even if there is formal accounting of them. But if there were, the number has to be in the millions, and thus statistically is it not likely that in any one day SOME LOCATION has experienced a hundred year event (including a temperature spike}?

July 7, 2018 6:39 am

There was also that high temp claimed in Pakistan back in late April. Wonder what the story was on that one. The claim was that it was the highest April temp ever recorded globally. …https://www.nytimes.com/2018/05/04/world/asia/pakistan-heat-record.html

tty
Reply to  goldminor
July 7, 2018 12:02 pm

Spring is the hottest season in India/Pakistan, before the monsoon starts. Many stations have May or even April as the hottest month, virtually none have July, as is usual elsewhere in the Northern Hemisphere.

July 7, 2018 6:43 am

Good sleuthing!

dodgy geezer
July 7, 2018 6:47 am

…the recent all time high in Scotland that turned out to be polluted by an idling vehicle producing hot exhaust near the temperature sensor….

The Scots one would surely have been rejected anyway – a sensor in a car park with dumped rubbish all around it is not an accurate station…

commieBob
July 7, 2018 6:51 am

This adds to a remarkable onslaught of all-time heat records set around the planet over the last ten days.

Every year there will be a number of hot and cold records. The CAGW alarmists will report the hot records as if they are unusual. They aren’t.

The alarmists will ignore cold temperature records dropping like snowflakes. link I continue to be skeptical because I simply do not trust the alarmists to tell the whole unvarnished truth.

Dr. Michael Mann’s attempt to erase the MWP with his hockey stick turned me into a skeptic. Since then it’s been one sad piece of crap after another. The left wing and the MSM paint The Donald as a liar. He doesn’t hold a candle to them.

Bruce Cobb
July 7, 2018 7:33 am

I hear they make a mean salad there, in Ouargla.
What, you’ve never heard of Ouargla salad?

Pamela Gray
July 7, 2018 7:43 am

A record temperature during a modern warm period. Meh. A few tens of thousands years from now that record temperature at that location will not be detectable. It is likely the case that in past warm periods over the last 800,000 years, records would have been recorded as freqently as they have been now, were the technology available.

July 7, 2018 7:57 am

I thought I had seen a temperature of 56 °C in Ain Salah, and indeed that memory was good. In a google book scan of 1961 I found:


The Physical Environment and Agriculture of Morocco, Algeria, …
Michael Y. Nuttonson – 1961 – ‎
… highest sun temperatures. In contrast to these great diurnal ranges, the annual range of temperature is not great and seldom exceeds 14° C. The highest temperatures ever recorded in Algeria are: 48° C. at Biskra, 54° C. at Touggourt, 55° C. at Timimoun,
and 56° C. at In Salah … The low temperature records include -5° C. at Ouargla, -4° C. at In Salah, and -2° C. at Biskra. In the Sahara, as in northern …

Paul Sepe
July 7, 2018 7:59 am

> Ouargla, with a population of nearly half a million, is located in north central Algeria, roughly midway between Morocco and Tunisia.

Unless it’s actually quadrupled since the last census, this population figure seems to be wrong as well. (It seems that in their careful research, they’ve taken the entire province’s population for the city’s.)

https://www.citypopulation.de/php/algeria-admin.php?adm1id=30

Jeff Alberts
July 7, 2018 8:58 am

In Seattle, they use SeaTac airport as the record of choice, regardless of what it’s doing all around it.

NOAA’s NCDC database puts the station at 47.4444°, -122.3138°, which on Google Maps puts it smack in the middle of all the runways. Just plug that number into Google maps and you’ll see it. The resolution on GM was too low for me to make out any individual structures, but there are several likely candidates.

I also looked at a little history. I looked at the June data for 1948, and 2018. not a lot of difference just eyeballing it. At the bottom of each generated PDF of the historical data it has a Summary field, which I assume means average.

Here are the max/min averages for the month.
        Max     Min
1948:   72        52
2018:   72        53

Looks like the equipment changed from Coop to 
ASOS in October 1996. So let's look at June 1997

1997:    67       52

And the big El Nino year of 1998:

1998:    68       52

And the El Nino of 2016

2016:    73      54

What does it mean? Probably nothing. But I’m sure not scared by it.

July 7, 2018 9:02 am

This so clearly brings into question the ultimate meaning of a “global average temperature”.

With humans occupying much of the land, how is it that we can disqualify human cities from being places to measure temperature? Are cities not where humans live MOST OF THE TIME ? Are temperatures of cities and temperatures surrounding our built structures not the temperatures in which humans live most of the time?

Do standardized temperature locations really have any meaning at all, compared to what humans generally experience most of the time ? The temperatures in which humans live ARE the temperatures of their cities and places with their built structures. We are already living in places where the temperature is above any anomaly based on any standardized-measuring-station determination.

Humans are now very much a part of the Earth scene, contributing to small increments in temperatures of their living spaces that “global average temperature” is engineered to ignore. A “global average temperature”, as determined by idealized, perfectly located measuring stations, NOT influenced by human structures, is a total fantasy. We live in the temperatures that our structures create in association with the natural structures of the Earth. When we compare a global temperature anomaly, figured from ideally located stations, and then freak out because of a fraction of a degree, why are we not freaking out about the possibly MULTIPLE degrees higher temperature that we already live in because of our structures? Those ideal anomalies do NOT reflect our actual living temperatures in our cities where we are ALREADY experiencing much more than the idealized anomaly of increase.

Even within the natural structures of the Earth, the temperature can differ by small amounts in the same general area, which reduces the idea of a small anomaly to a non-physically-based idea.

noaaprogrammer
Reply to  Robert Kernodle
July 7, 2018 6:30 pm

During the summer most of my time is spent inside of buildings where air-conditioning keeps the temperature in the low 70s F.

During the winter most of my time is spent inside of buildings where heating keeps the temperature in the low 70s F.

I guess my average global temperature is somewhere in the low 70s F.

Reply to  noaaprogrammer
July 8, 2018 3:43 pm

Mine is about 75 F. (^_^)

dmacleo
July 7, 2018 9:26 am

temp sensor would be close to runway, critical that a/c have correct air temps at runways

MarkW
July 7, 2018 10:57 am

Even without the ice cream truck, the Scottish record would have been invalid because of the extremely bad conditions in the immediate vicinity of the sensor.

climatebeagle
Reply to  MarkW
July 7, 2018 11:59 am

But it wasn’t. One would have assumed its siting issues would have disqualified it immediately, but there’s no indication the Met Office would have done that.

ATheoK
July 7, 2018 12:16 pm

“any sensible person would ask WHY?”

Well, that sure explains NASA GISS.

July 7, 2018 12:37 pm

The commenters over at WaPo are true believers, preparing for the heat apocalypse. I am always amazed that they become so upset by this kind of report.

Trevor
July 7, 2018 1:18 pm

“Snow falls in Sahara desert for third time in 40 years | The Independent
https://www.independent.co.uk › News › World › Africa
“Jan 9, 2018 – Snowfall covered the desert dunes. … Snow has fallen in the Sahara, covering desert dunes in a layer up to 40cm deep. Snow started falling on the Algerian town of Ain Sefra in the early hours of Sunday ”
GOODNESS ME ! FANCY IT BEING HOT IN ALGERIA ??????
IT MUST HAVE SOMETHING TO DO WITH THE WEATHER perhaps !???

Sheri
July 7, 2018 1:26 pm

All this record stuff was kind of cute when Guiness did it. Not so much when politicians and the media do it to cause panic. Records are great for book you want to hawk….

Juan
July 7, 2018 2:18 pm

Only the dumbest people still believe anything from this pathetic rag. They have been caught lying countless times.

stephen.skinner
July 7, 2018 2:23 pm

“Unfortunately in this particular instance we have evidence that a stationary vehicle with its engine running was parked too close to the observing enclosure and the Stevenson screen housing the thermometers during the afternoon of 28th June,” the Met Office explained.”
Why is it unfortunate? Does the Met Office want a high temperature?

Editor
Reply to  stephen.skinner
July 7, 2018 6:53 pm

You’re referring to the Scotland incident in a pair of other posts. This one likely involves a large airplane.

brians356
July 7, 2018 3:45 pm

The highest official temperature ever recorded in my hometown Lewiston, Idaho (only a couple hundred miles from Canada) was 115 f. That was just set in [drum roll] … 1962. Proof the world has been cooling for 55+ years.

noaaprogrammer
Reply to  brians356
July 7, 2018 6:43 pm

Was that temp recorded in the valley where the steep Lewiston Hill to the north almost acts like a reflective oven on the entire valley; or was it recorded at the higher elevation at the airport in the Lewiston Orchards?

(I was in high school then, and I remember reading 117 F on our home thermometer in nearby Clarkston that summer.)

brians356
Reply to  noaaprogrammer
July 8, 2018 7:40 pm

It was almost certainly recorded at the former NWS station at the airport. Down on Main St it would have been much hotter. Our family drove that day in a 1960 Chevy to spend several days at Zim’s Plunge, the hot springs resort in central Idaho! My dad borrowed a window mounted swamp cooler, but it was useless.

TRM
July 7, 2018 5:38 pm

Meanwhile South Africa is getting snow, some in places that have never had it.

https://www.iceagenow.info/elation-and-awe-as-capetonians-experience-snow-for-the-first-time-video/

Kristi Silber
July 7, 2018 11:45 pm

“In my view, this temperature record should be disqualified as being influenced by man-made objects”

Sheesh! I can understand why skepticism is warranted, but saying it should be disqualified based on guesses and suspicions is a little much. Are there any other stations near enough to compare temperature patterns? Does the record appear to generally have anomalous temperatures at the station? Are temps higher when the wind is from the southwest? According to Weather Underground, at 3 p.m. the wind was SSW, not WSW; according to the SYNOP report it was WNW. Regardless, the temps were evidently very high for an extended period no matter what wind direction was recorded.

And it’s not in the runway approach area.

Kristi Silber
Reply to  Anthony Watts
July 8, 2018 5:52 pm

Anthony, please don’t misunderstand – I agree that the record temp is suspect, but I disagree with the idea that it should simply be thrown out based on the evidence you provided, which contains some guesses and assumptions. I do agree that the WaPo article jumped the gun. I don’t doubt that there are station siting problems (the Roman example is a good one), but that has absolutely nothing to do with whether the record temperature recorded here is false.

The fact that the whole afternoon had very high temps is not irrelevant, and it wasn’t a “deflection” on my part. However, I understand your point.

“Also, you may not understand what a “runway approach” is. It is in fact within the approach area of runway 20.” I guess part of the problem here is that “area” is pretty vague. Judging by the distance and patterns on the soil, I wonder how significant a problem this really is.

I had seen your work before, and also the response from NOAA (https://www.ncdc.noaa.gov/ushcn/station-siting). Why should I have to publish anything to counter your concerns in order to voice an opinion? Your concerns are legitimate. Your (and others’) work was valuable and an admirable effort, at the very least because it instigated a closer look by NOAA at their data. That said, I’m not sure the data are as faulty as you suggest, or that “the NOAA/NCDC homogenization adjustment causes well sited stations to be adjusted upwards to match the trends of poorly sited stations” – but I emphasize that I’m not sure, meaning I withhold judgment.

P.S. Usually you give a h/t to those who find errors, don’t you? It wasn’t just a typo – you used it to orient your arrow. I noticed the slight, but no big deal. Your decision. Understandable – it’s people like me you are fighting.

P.P.S. Is north not toward the top of the image? Funny how the arrow on the graph doesn’t agree with the reading. And why choose 3 p.m. for your wind direction, rather than 4, when it was from the SE or WNW, depending on which you believe? To me the wind direction is not good evidence to use here based on the inconsistent readings and not knowing when the high was reached. It is this kind of thing that makes alarm bells ring, making me wonder how dispassionately you view the data. I’m not picking on you -no human reasons well all the time, myself included. The best scientists (I am NOT included!) are always mindful of potential for bias – it’s the only way to counteract it.

Philip Schaeffer
Reply to  Kristi Silber
July 9, 2018 12:52 am

I’d certainly be curious to know where the nearest “ideal” station is, and if it is very close, how it compares.

I think it would be interesting to compare a list of known sites that may be compromised, that have un-compromised stations close by, to see the range of the differences between them.

Obviously, this is not always possible, but I still think it would be useful to get a handle on the magnitude of the problem, and to build up a picture of how much difference is made by the many different ways a station may be compromised.

Kristi Silber
Reply to  Philip Schaeffer
July 10, 2018 7:36 pm

The nearest site (though I don’t know how “ideal” it is) is OUED IRARA, AG (in Haoud El Hamra . The high there was 121 F that day, according to NOAA. Also according to NOAA (I just got the official results – it took them longer to process the temp there for some reason, maybe because they were double checking it? Who knows?) the high at Ouargla was 124 F. The stations appear to be about 80 km apart.

July 8, 2018 12:50 am

This minimum record in Oman could also have connections to aircraft, runways and carparks, but I haven’t the time to check just now. https://www.wunderground.com/cat6/Minimum-Temperature-426-C-1087-F-Oman-June-26-2018-New-World-Record

beng135
July 8, 2018 7:03 am

OH NO!! The desert is hot, hot, hot!
https://youtu.be/MYITD8TMvcM

Charles
July 8, 2018 11:14 am

Somewhat related.

There is a roadside automatic weather station on east bound interstate 1976 east of Denver high in the hills. have of the station hangs over a guard rail that is for a bridge.

Do they use these roadside AWS for calculating global temperature?

Johann Wundersamer
July 8, 2018 12:34 pm

Just look at the small area for the jet above, it has to make a 360 rotation and that spews jet exhaust everywhere.

Sure? What good is 360 rotation for.

180 would’nt do it?

richard
July 10, 2018 1:42 am

The WMO say it best about temps in Africa-

“Because the data with respect to in-situ surface
air temperature across Africa is sparse, a one year
regional assessment for Africa could not
be based on any of the three standard global
surface air temperature data sets from NOAANCDC,
NASA-GISS or HadCRUT4. Instead, the
combination of the Global Historical Climatology
Network and the Climate Anomaly Monitoring
System (CAMS GHCN) by NOAA’s Earth System
Research Laboratory was used to estimate
surface air temperature patterns”

“In order to assess the state of the climate
in any region, regular distributed and longterm
observations are needed within that
region. Unfortunately, WMO Regional
Baseline Climatological Network (RBCN)
stations and GCOS Global Surface Network
(GSN) stations across the African continent
often lack resources to report on monthly
or on annual (see Figure 4) time scales”

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