A quick overview
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Temperature:
The value highlighted in yellow located in the upper left corner is the temperature in degrees Celsius. In this example, the reported temperature is -14 degrees. |
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Dew
Point Temperature:
The value highlighted in yellow located in the lower left corner is the dew point temperature in degrees Celsius. In this example, the reported dew point temperature is -34 degrees. |
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Geopotential
Height:
The value highlighted in yellow located in the upper right corner represents the geopotential height in meters (m). |
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Wind
Barb:
The symbol highlighted in yellow is known as a wind barb. The wind barb indicates wind direction and wind speed |
Information provided by: http://ww2010.atmos.uiuc.edu