Column 1 - Day of month.
Column 2 - Maximum temperature for the day (midnight to midnight CST).
Column 3 - Minimum temperature for the day (midnight to midnight CST).
Column 4 - Average daily temperature.
Column 5 - Departure of the average temperature from normal.
Column 6a - HDD - Heating Degree Days, used to estimate energy demand.
Column 6b - CDD - Cooling Degree Days, used to estimate energy demand.
Column 7 - Precipitation amount for the day (liquid equivalent).
Column 8 - Snowfall amount for the day (includes sleet, hail, and glaze).
Column 9 - Snow depth (taken at 6 A.M. CST)
Column 10 - Average daily wind speed in MPH.
Column 11 - Fastest one-minute sustained wind speed.
Column 12 - Direction of the fastest wind speed in degrees clockwise from north.
Column 13 - Minutes of sunshine.
Column 14 - Percent of possible sunshine.
Column 15 - Cloudcover from sunrise to sunset in tenths.
Column 16 - Weather codes (key is on F-6 form).
Column 17 - Peak wind gust in MPH.
Column 18 - Direction of peak wind gust in degrees clockwise from north.