This how data is cherry picked and has been mentioned before on WUWT that
many temperature monitoring stations are near airport runways, where the black body radiation is higher and the heat from the jet engines of the planes is not taken into account.
The University of Arizona climate department has distinguished itself in the past by running this
fine temperature monitoring station, located between buildings in the middle of an asphalt parking lot:
This is such a powerful argument because there is some truth to it — when you plop down a new road or build a town around what used to be a rural National Weather
Service temperature monitoring station, there's going to be a major uptick in the temperature that station measures.
So what are the problems which can change the category of
a temperature monitoring station to lower than 1?
Unfortunately, not
every temperature monitoring station in the U.S. is located in the best place.