"Red Green" wrote in message


In the bag/dun deal test and cal from NOAA/NWS:

http://www.srh.noaa.gov/elp/wxcalc/cricketconvert.shtml

That should work most of the year but the crickets tend to be quit at 5
below.

I did some searching and found a Zephyr Instrument model that is supposed to
be accurate to 0.5 degrees. That is a more sensible tolerance.