Preliminary Climate Data (F6) Codes Explained |
Column Number |
Abbreviation |
Explanation |
| 1 |
Dy |
The date. |
| 2 |
Max |
The highest temperature for the day. |
| 3 |
Min |
The lowest temperature for the day. |
| 4 |
Avg |
The average temperature for the date. Computed by finding the average of the values in columns 2 and 3, then rounding up (if necessary). |
| 5 |
Dep |
Departure from normal. The difference between column 4 and the 30 year normal temperature for this date. |
| 6a |
Hdd |
Heating degree days. Computed by subtracting the average temperature from 65. If less than 0, HDD=0. |
| 6b |
Cdd |
Cooling degree days. Computed by subtracting 65 from the average temperature. If less than 0, CDD=0. |
| 7 |
Wtr |
Total precipitation for the day in inches. This includes all forms of precipitation, melted if snow or ice occurred. |
| 8 |
Snw |
Total snowfall for the day in inches. |
| 9 |
Dpth |
Snow depth in inches at 6am CST in inches. |
| 10 |
Avg Spd |
Average wind speed for the day in mph. |
| 11 |
Mx Spd |
The highest wind speed measured over a 2 minute period in mph. |
| 12 |
2 Min Dir |
The direction (in compass degrees divided by 10) from which the wind speed in column 11 came from. ( N=36 S=18 W=27 E=09 etc.) |
| 13 |
Min |
The number of minutes of sunshine received at the station. |
| 14 |
Psbl |
The percentage of possible sunshine. Computed by dividing the minutes of sunshine (column 13) into the total possible minutes. |
| 15 |
S-S |
The average sky cover between sunrise and sunset in tenths. |
| 16 |
Wx |
Weather types observed during the day. Use the following list to decode types: |
| 17 |
Wnd Spd |
Peak wind speed for the day in mph. The highest wind speed observed at the station. |
| 18 |
Wnd Dr |
The compass direction from which the peak wind speed came. |
