Suface map key
Conditions at the reporting station in the example shown:

Cloud Cover is 100%, total overcast.
Temperature is 67 degrees.
Barometric pressure is 191 millibars.
Dewpoint is 56 degrees.
Wind Direction is North Northeast.
Wind Speed is 15 to 21 miles per hour.

In some cases, the change in barometric pressure over the last three hours may be reported at the bottom right of the circle. Falling barometric pressure may indicate severe weather will occur.

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Last Revised: March 28, 1998 © Mark Sefried and Lindsey Ross Block

End of Skywarn: Surface Data Plot Key. Copyright © Mark Sefried and Lindsey Ross Block