This is another post on USHCN warming. You can read more here.

USHCN puts out a monthly dataset every day. For the last month or so I was using the data I downloaded on on 20140509. I have been using the Final tavg data.

Today I downloaded the 20140621 version from here: ftp://ftp.ncdc.noaa.gov/pub/data/ushcn/v2.5

I thought … why not map both sets and compare the average temperature for the USA in Jan 1998 between the two sets of data.

In the legend I placed the count of Real versus Estimated and the average.

I was shocked. They are still warming 1998!

On May 9 the mean of the Estimated data was 2.5C and the mean of the Real Data was 1.74 … which is a .76C spread.

On June 21 the mean of the Estimated data was 2.72C and the mean of the Real Data was 1.7 … which is a 1.02C spread.

OMG. They keep changing the data. And they are still warming 1998!!!