Weather Symbols

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Weather Symbols
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The Station Model
The weather of an individual weather station is
plotted on a station model.
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The value highlighted in yellow located in the
upper left corner is the temperature in degrees
Fahrenheit.
Temperature is defined as a measure of the
average of the speed of the molecules in motion
in the air. - fast the molecules high
temperatures - slow molecules low temperatues
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Weather Symbol
The weather symbol indicates the type of weather
occurring at the time the observation is taken.
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Dew Point Temperature
Indicates the amount of moisture in the air
The higher the dew points, the higher the
moisture content in the air. Dew point the
temperature to which the air would have to cool
in order to reach saturation. Saturation When
the dew point temperature and air temperature are
equal. You can tell if air is saturated by the
formation of water droplets (drops on a
glass). Dew point temperature is NEVER GREATER
than the air temperature. What do you think
happens when the temperature equals the dew
point?
Formation of droplets of water, fog, or
precipitation.
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Cloud Cover
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Air Pressure
The value highlighted in yellow represents the
last three digits of the observed pressure
reading in millibars (mb).
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Wind barbs point in the direction "from" which
the wind is blowing. In the case of the diagram
to the right, the orientation of the wind barb
indicates winds from the Northeast.
Wind speed is given here in the units of "knots".
A "Knot" is a nautical mile per hour.
1 Knot 1.15 Miles Per Hour (MPH) 1 Knot 1.9
Kilometers Per Hour (KM/HR)
Each short barb represents 5 knots, each long
barb 10 knots. A long barb and a short barb is 15
knots, simply by adding the value of each barb
together (10 knots 5 knots 15 knots). If only
a station circle is plotted, the winds are calm.
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