 Weather Maine http://weathermaine.com/davis/educate/seabreezes |
Seabreeze on June
23, 2003 South Portland, Maine Weather Sensors |
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Barometer Jump begins at 12:00 Noon and rises from
29.805" to 29.836" at 12:50PM. The barometer is mostly
steady for several hous after the Seabreeze front passage, then
rises slowly into the evening.
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The temperature drops from 78.5°F at Noon to 66.8°F at 12:50PM;
the temperature dropped almost 10 degrees F in the first 1/2 hour
of the passage. Unlike the Barometer, the temperature keeps dropping, and ends up at 63.1°F at 1:40PM. Overall change is 11.7°F in 1 hr, 40mins. |
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Dewpoint drops a bit earlier than the rest. It fluctuated around
65°F 1 hour preceeding the event, and dropped 5°F in two hours.
The dewpoint delta for this event is about 6°F The relative humidity jumped by 10% right after the frontal passage. |
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Definite wind shift from N and NNW to SSE and S. The winds were Northerly all morning long, then S or SSE after the seabreeze front passage. | ||
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Graph shown to left is wind speed; the local topography affects
wind speeds, so wind gust is used in this example. Wind (gust) picks up from 2 mph (during the hour preceeding) to 6 mph during the hour following the sea breeze front passage. There is a marked increase in the overall wind speed as indicated by the graph. |
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