Upper Air Text

Upper Air Data - Text

The DataStreme Atmosphere product displayed below is an example of an upper air observation taken at Topeka, Kansas.

Sounding Data for TOP (72456)
 
12Z 11 AUG 2004
 
 LAT =  39.07     LON =   -95.62   ELV =   270.0
 
      PRES     HGHT     TMPC     DWPC     RELH     DRCT     SKNT     MIXR
 
       987      270     13.2     12.1      93       290       3       9.1
      1000      159      0.0      0.0       0         0       0       0.0
       983      305     13.8     11.9      89       300       5       9.0
       961      497     16.8     10.8      68       338      14       8.6
       948      610     16.0     10.0      68         0      19       8.2
       925      822     14.4      8.4      67         5      16       7.6
        .
        .
        .
        20    26760    -48.7    -73.7       4        90      24       0.1
        18    27432    -48.5    -73.5       4        90      26       0.1
        17    28022    -48.5    -73.5       4        80      27       0.2
        16    28042    -48.3    -73.4       4        80      27       0.2
        15    28653    -44.5    -71.5       3        84      27       0.2
        11    30480    -42.4    -70.1       3        95      28       0.3
        10    31380    -41.5    -69.5       3        95      33       0.4
         8    33223    -40.0    -68.8       3        95      45       0.5
         7    33712    -39.7    -68.7       3         0       0       0.6

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Heading of report:

Sounding data Station (3-letter identifier) and World Meteorological Organization identity code.
UTC (Z) time and Date
Station location information: LAT (latitude in degrees, positive for Northern Hemisphere), LON (longitude, negative for Western Hemisphere), ELV (elevation in meters above mean sea level)

For different levels in the atmosphere the upper air observation includes:

PRES - pressure in millibars. **
HGHT - altitude of that pressure level in meters.
TMPC - temperature in degrees Celsius.
DWPC - dewpoint in degrees Celsius.
RELH - relative humidity in percent.
DRCT - wind direction rounded to nearest 5 degrees, clockwise from true north.
SKNT - wind speed in knots.
MIXR - mixing ratio (atmospheric humidity measure) in grams of water vapor per kilogram of "dry air".

** If the surface station pressure is less than 1000 mb, the altitude of the missing 1000-mb level will be listed (less than station elevation) and other values shown as "0".

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