But perhaps you missed this.
'New study of NOAA's U.S. Climate Network shows a lower 30-year temperature trend when high quality temperature stations unperturbed by urbanization are considered'
'A new study about the surface temperature record presented at the 2015 Fall Meeting of the American Geophysical Union suggests that the 30-year trend of temperatures for the Continental United States (CONUS) since 1979 are about two thirds as strong as officially NOAA temperature trends.
Using NOAA’s U.S. Historical Climatology Network, which comprises 1218 weather stations in the CONUS, the researchers were able to identify a 410 station subset of “unperturbed” stations that have not been moved, had equipment changes, or changes in time of observations, and thus require no “adjustments” to their temperature record to account for these problems. The study focuses on finding trend differences between well sited and poorly sited weather stations, based on a WMO approved metric Leroy (2010) for classification and assessment of the quality of the measurements based on proximity to artificial heat sources and heat sinks which affect temperature measurement.
https://fallmeeting.agu.org/2015/press-item/new-study-of-noaas-u-s-climate-netwo...Presented by Watts at the American Geophysical Union fall meeting.
So NOAA's temperature trends are too hot by two thirds. And they use these for Global Temperatures.
But we can't question the science.
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