04:52 PM PDT on Wednesday, July 29, 2009
By TRAVIS PITTMAN / KING5.com
SEATTLE – With temperatures in the Puget Sound region breaking records this week, many people are playing a watching and waiting game – waiting to see when the thermometer outside their home will reach triple digits.
Below is a photo of a thermometer sent to KING 5 News Tuesday afternoon by a viewer in Oso, east of Arlington. It clearly shows the temperature reading 116 degrees. You can also clearly tell the sun is reflecting off it and it’s mounted right next to a building.
source: KING 5 Viewer…
The National Weather Service says this is where you need to place your thermometer to get an accurate reading:
– It must be in a shaded, well-ventilated and open area, 5 feet above ground, give or take a foot.
– Away from sprinkler systems
– No closer than four times the height of any obstruction. For example, if a building is 10 feet tall, it needs to be no closer than 40 feet from that building.
– Located over natural ground such as grass, dirt or sod.
– At least 100 feet from road or concrete.
The picture they provide is what the surfacestations project is all about. Note the 100 foot distance from asphalt.
Here is a diagram of how to properly place your thermometer to get an accurate reading.
Full article here h/t to WUWT reader “Ed”