Is this a diurnal surface pressure drop?

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Nimbus
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Is this a diurnal surface pressure drop?

#1 Postby Nimbus » Mon Jul 26, 2004 5:24 pm

The buoy off Tampa Florida dropped quite a bit this afternoon.

http://www.ndbc.noaa.gov/station_page.p ... tion=42036

Is there a low somewhere in the area causing this?
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#2 Postby bahamaswx » Mon Jul 26, 2004 5:34 pm

It's only fallen 3mb since 12:50pm
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#3 Postby vbhoutex » Mon Jul 26, 2004 7:45 pm

That is a normal drop for most any afternoon.
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#4 Postby kevin » Mon Jul 26, 2004 8:14 pm

Study this to your heart's content to find out. Its five days of observations from that bouy.

http://www.ndbc.noaa.gov/data/5day2/42036_5day.txt
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#5 Postby wxman57 » Mon Jul 26, 2004 9:09 pm

No, it's not a diurnal drop. The ocean doesn't behave like land areas with that respect, as there is no "daytime heating" over the water. What you're observing is a slow pressure drop as that weak cold front dips down toward the buoy. Nothing more.
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#6 Postby tailgater » Mon Jul 26, 2004 10:21 pm

Pressures on a average vary much like tides on a 12 Hr. cycle, I 've found it's best to look at the difference of what it was 24Hrs. ago
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