After selecting a state by clicking the mouse pointer on its postal identity code from the selection table, the following sample display of weather conditions for the reporting stations in that state is given.

                                                                                
HH  STN  TMP DEW  DIR SPD GST  CLDL CLDM CLDH    ALT    PMSL  PTD WTHR PCPN SNOW
                                                                                
18  OXC                                                                         
18  BDR   80  70   21   9       CLR             29.92  1013.0  -0.              
18  HVN   78  71   16  11       SCT             29.92  1013.2  -0.              
18  GON   76  71   20  11       OVC             29.95  1014.0  -0.              
18  BDL   83  69   18  13       BKN             29.89  1011.9  -1.              
18  IJD   81  69   18  10       CLR             29.94  1013.5  -0.              
18  DXR   79  70   16   8       SCT             29.91  1012.5  -0.              
18  HFD   82  69   19  11       SCT             29.89  1012.2  -1.              
18  SCB   43  36   30  15                       30.09                           
18  MMK   82  70   21   9       SCT             29.91  1012.7  -0.              

The tabular set of weather conditions at the stations in that state contains:

A tabular listing of surface data reported for the state (in postal code abbreviation) is given. Hour and date follow the state heading.

1. HH -- hour in Z (UTC) when observation was taken.
2. STN -- usually three letter coded station identifier, see Surface Weather Stations.
3. TMP -- temperature in Fahrenheit.
4. DWP -- dewpoint in Fahrenheit.
5. DIR -- wind direction in tens of degrees, a north wind (from the north) is 36, east 9, calm 0
6. SPD -- wind speed in knots (nautical miles per hour).
7. GST -- maximum speed of brief wind gusts in knots.
8. Cloud coverage information divided into three levels:
   CLDL, "low" - up to 5000 feet (1524 m)
   CLDM, "middle" - from 5000 to 10,000 ft (3049 m)
   CLDH, "high" - above 10,000 ft
   • extent of cloud coverage of the sky at that level:
     "CLR" - clear, no clouds detected
     "F" - few, 1/8 to 2/8 sky covered at that level (also shown as -S)
     "SCT" - scattered, 3/8 to 4/8 sky covered
     "BKN" - broken, 5/8 to 7/8 covered
     "OVC" - overcast, 8/8 covered
     "X" - obscured, clear base not observed due to fog, haze, etc.
9. ALT -- aircraft altimeter setting in inches of mercury.
10. PMSL -- mean sea-level pressure in tenths of millibars.
11. PTD -- pressure tendency in tenths of millibars, change over the previous 3 hours. Given at 00Z, 03Z, etc. e.g.. -0.3, pressure now lower by 3/10 of mb.
12. WTHR -- present weather condition, letter code, if obstruction to visibility.
13. PCPN -- precipitation (if any) in hundredths of inches, given at 00Z, 03Z, etc.
14. SNOW -- snowfall (if any) in tenths of inches, given at 00Z, 03Z, etc.

Definitions and rules for surface observations can be found in Federal Meteorological Handbook No. 1.