Category Archives: USHCN & GHCN

The U.S. National Temperature Index, is it based on data? Or corrections?

By Andy May The United States has a very dense population of weather stations, data from them is collected and processed by NOAA/NCEI to compute the National Temperature Index. The index is an average temperature for the nation and used to show if the U.S. is warming. The data is stored by NOAA/NCEI in theirContinue reading “The U.S. National Temperature Index, is it based on data? Or corrections?”

Comparing USCRN and nClimDiv to USCHN

By Andy May Steven Mosher complained about my previous post on the difference between the final and raw temperatures in the conterminous 48 states (CONUS) as measured by NOAA’s USCHN. That post can be found here. Mosher’s comment is here. Mosher said the USHCN is no longer the official record of the CONUS temperatures. ThisContinue reading “Comparing USCRN and nClimDiv to USCHN”

Recent USHCN Final v Raw Temperature differences

By Andy May While studying the NOAA USHCN (United States Historical Climate Network) data I noticed the recent differences between the raw and final average annual temperatures were anomalous. The plots in this post are computed from the USHCN monthly averages. The most recent version of the data can be downloaded here. The data shownContinue reading “Recent USHCN Final v Raw Temperature differences”