State Surface Data - Text

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

Data for CO

18Z 25 OCT 2010

HH STN TMP DEW DIR SPD GST CLDL CLDM CLDH ALT PMSL PTD WTHR PCPN SNOW
18 ALS 53 36 23 28 43 CLR 29.49 992.0 -1.3
18 DRO 47 43 26 21 30 OVC 29.60 999.2 -2.8 R 0.04
18 LAA 65 35 35 22 38 CLR 29.24 987.1 1.5
18 PUB 62 35 36 20 26 CLR 29.36 990.3 2.7
18 TAD 69 32 29 32 46 CLR 29.29 984.9 -2.9
18 COS 50 35 35 16 24 BKN 29.40 990.7 1.7
18 ASE 25 25 34 7 OVC 29.66 1001.0 1.2 S I 0.35
18 GJT 47 37 36 3 SCT 29.70 1002.4 1.2 0.33
18 GXY 54 23 28 15 18 BKN 29.38 0.0
18 DEN 49 35 23 6 SCT BKN 29.43 992.2 1.9

Go to current - Surface Text Data by State

The tabular set of weather conditions at the stations [in this example, the state of Colorado (CO)] contains:

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

  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 degrees Fahrenheit.
  4. DWP -- dewpoint in degrees Fahrenheit.
  5. DIR -- compass wind direction in tens of degrees from true North, 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
  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. -1.3, pressure now lower by one and 3/10 of mb.
  12. WTHR -- present weather condition, letter code, if obstruction to visibility, e.g. R for rain, S for snow, I for ice pellets ("sleet").
  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.

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