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Observed Sea Level Pressure
station reporting symbol
The value highlighted in yellow located
in the upper right corner (in the diagram above) represents the
last three digits of the
observed pressure reading in
millibars (mb).
Interpreting Pressure Reports:
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If reported value greater than 500:
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Initial 9 is missing. Place it on left, then divide by 10.
For example:
827 becomes 982.7 mb.
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If reported value less than 500:
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Initial 10 is missing. Place it on left, then divide by 10.
For example (as in above diagram):
027 becomes 1002.7 mb.
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cloud cover
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winds
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