Frances Being Stationery Has Helped

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Sean in New Orleans
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Frances Being Stationery Has Helped

#1 Postby Sean in New Orleans » Sat Sep 04, 2004 12:09 am

It's a good thing that Frances has been stationery for the last day..it has helped the storm to weaken as the system has churned deep cooler waters to the surface which is weakening the system before our eyes. This is a real blessing to see this storm weaken. Frances could strengthen, though, just before reaching West Central Florida when the system moves over warmer waters...
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ericinmia
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#2 Postby ericinmia » Sat Sep 04, 2004 12:14 am

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bahamaswx
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#3 Postby bahamaswx » Sat Sep 04, 2004 12:21 am

Bahamas -- Baja Mar -- Shallow Seas.

No "deep cooler" water to upwell.

Image
Last edited by bahamaswx on Sat Sep 04, 2004 12:25 am, edited 1 time in total.
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ROCK
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Re: Frances Being Stationery Has Helped

#4 Postby ROCK » Sat Sep 04, 2004 12:21 am

Sean in New Orleans wrote:It's a good thing that Frances has been stationery for the last day..it has helped the storm to weaken as the system has churned deep cooler waters to the surface which is weakening the system before our eyes. This is a real blessing to see this storm weaken. Frances could strengthen, though, just before reaching West Central Florida when the system moves over warmer waters...



you may be right but an earlier post stated the upwelling is not an issue here. If I remember right it would have to sit in one place for 48 hours. But what do I know Im a new guy here..lol...
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frankthetank
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#5 Postby frankthetank » Sat Sep 04, 2004 12:31 am

heres an overlay from this afternoon

Image

high res http://rapidfire.sci.gsfc.nasa.gov/gall ... 4.250m.jpg
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#6 Postby opera ghost » Sat Sep 04, 2004 12:40 am

So, essentially, she's going over very shallow waters and *that* could be part of the problem?

Completly OT but my curriosity demands- how shallow ARE those waters... they look very very shallow.
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#7 Postby btangy » Sat Sep 04, 2004 12:52 am

Here's a link to the bathymetry.

http://walrus.wr.usgs.gov/infobank/gaze ... y/bhs.html

They are shallow indeed. More important than bathymetry is the depth of the mixed layer of the ocean because that controls how much heat the upper ocean contains and how quickly mixing/upwelling cools the SSTs. I don't believe the shallowness of the water around the Bahamas are the problem. The main problem is still with the upper atmospheric winds and perhaps some dry air intrusion around 500mb.
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#8 Postby bahamaswx » Sat Sep 04, 2004 12:55 am

Certainly. The Bahamas did not weaken Frances, and I wouldn't blame dry air very much either. Shear was the major contributer.
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