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Tropical Storm Odette forms off NC coast likely to remain offshore and head out to sea becoming post-tropical over the weekend.
Days since last H. Landfall - US: Any 4 (Nicholas) , Major: 19 (Ida) Florida - Any: 1073 (Michael) Major: 1073 (Michael)
36.4N 71.2W
Wind: 40MPH
Pres: 1010mb
Moving:
Ne at 10 mph
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News Talkback >> 2021 News Talkbacks

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MikeCAdministrator
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Reged: Sun
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Loc: Orlando, FL
Late July Activity
      #113869 - Fri Jul 23 2021 09:00 AM

8:30 AM EDT 25 July 2021 Update:
The system east of Florida (90L) still has a 50% chance for development. In this case the circulation is well defined, but it lacks convection, as lot has been shared off. Thus a fairly dry system, but it is capable of enhancing afternoon showers. It likely will eventually drift over Florida, and barely be noticeable other than the breeze.

What could change (even if unlikely) is it developing convection near the center that persists and expands. Conditions are very borderline for that to happen, so it's more of a wait and see, even if it does, there is not much time for it to organize. So the most likely outcome is that the circulation moves over Florida barely noticed.
Original Update:

For the end of July, a new area off the southeast coast of the US (Invest 90L) has about a 40% chance for development over the next 5 days or so, as this surface trough sits near or over the Gulf Stream for the next few days.

Parts of the system may drive up rainfall quite a bit over the weekend in parts of Florida, especially in South Florida where it may be enough to cause some flooding rainfall when the interaction of seabreeze storms kick in.

The rain likely will impact more of central and North Florida/GA later in the weekend into Monday. If the system develops it could be a tropical/subtropical system if aided enough by the warm gulf stream waters, working against it is northwesterly shear of about 20-25 knots.

Future models suggest it may meander of the same area and either slowly drift southwest over Florida or move into South Carolina, causing a lot of rain when it does. It's something to watch over the next several days.

If this manages to develop, the next name on the list is Fred. Recon aircraft are tentatively scheduled to investigate tomorrow.
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SFWMD Model Plot (Animated Model Plot) SFWMD Hurricane Page

[https://flhurricane.com/floatanimator.php?year=2021&storm=6 Flhurricane Satellite Floater Animation of 90L
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Clark Evans Track Model Plot of 90L (Animated!) Model Plots in Google Earth - In Google Maps
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IsoFlame
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Reged: Wed
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Loc: One block off the Atlantic Oce...
Re: Late July Activity [Re: MikeC]
      #113870 - Fri Jul 23 2021 11:40 AM

Your analysis is spot on regarding heavy rainfall potential for southf Florida. If 90-L develops some more east of the Cape, then retrogrades WSW/SW across the Space/Treasure coast as forecast, the NE surge kicking in Saturday along the coast north of the Cape associated with the frontal trough and low will drive the bulk of moisture across the south half of Florida.

Drier air entrained into the circulation from the NW will lead to considerably lower rain chance for the north half of Florida, and the heaviest showers/storms will congregate just inland along and to the south of the I-4 corridor, then drop SW away from my still-thirsty central coastal Volusia rain gauge (2"+ July deficit, 6" annual deficit to date).

--------------------
CoCoRaHS Weather Observer (FL-VL-42) & Surf Forecaster: https://www.surf-station.com/north-florida-surf-forecast-3/


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