Yesterday I reported that USHCN raw monthly temperatures do not match the daily temperatures for the corresponding month, and the changes from raw daily to raw monthly produce a bias which makes their TOBS adjustment look legitimate.
So I started looking at specific examples – this is the second one I have looked at so far.
Jefferson City, MO is station ID USC00234271
During June, 1926 the station reported maximum temperatures every day of the month, with an average daily maximum of 27.54C.
But the USHCN monthly raw temperature for Jefferson, MO June 1926 is marked as 2833c, which means 28.33C and a code of “c”
Their documentation doesn’t say anything about a code “c” and there is nothing even slightly suspicious about the daily temperature data for that month. So why does the raw maximum monthly temperature differ from the measured maximum daily average by 0.8C?
This is completely nuts. What are these people doing?