189 FXUS62 KTBW 060714 AFDTBWArea Forecast Discussion National Weather Service Tampa Bay Ruskin FL 314 AM EDT Sat Sep 6 2025
...New DISCUSSION, AVIATION, MARINE, FIRE WEATHER...
.DISCUSSION... Issued at 314 AM EDT Sat Sep 6 2025
In the upper levels, a broad trough/closed low centered north of the Great Lakes will slowly progress through eastern Canada this weekend through early next week as a series of shortwaves rotate through the midwest and northeastern US. At the surface, a weak trough axis is extending from the western Atlantic across the Florida Peninsula and ending with a weak surface low over the eastern Gulf. This pattern is pumping deep moisture into the southern and central portions of the forecast area today under southerly and southeasterly flow, resulting in scattered to widespread thunderstorms again today. On Sunday, the surface flow will become weak and rather variable, although deep moisture along the surface trough will continue to result in scattered to widespread thunderstorms.
By Monday, the Gulf surface low will begin to dissipate as a weak frontal boundary pushes south into Florida and the eastern Gulf and replaces the surface trough axis, which really won`t change the overall pattern that much. As the frontal boundary stalls out across central Florida through the rest of the week, deep moisture will continue to result in scattered to widespread thunderstorms each day next week, with easterly flow setting up a pattern of mainly afternoon to early evening thunderstorm timing.
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.AVIATION... (06Z TAFS) Issued at 314 AM EDT Sat Sep 6 2025
Scattered showers are starting to develop and shift onshore and into the vicinity of southwest Florida area terminals early this morning, which are expected to continue off and on through mid morning. Numerous showers and storms will then develop during the afternoon and early evening, and could threaten all area terminals beginning around 18-20z. Rain will clear out by around 00-03z this evening, allowing VFR conditions to return.
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.MARINE... Issued at 314 AM EDT Sat Sep 6 2025
A weak boundary will remain stalled across the waters through the weekend and then will be reinforced from the north next week, with deep moisture along and south of this boundary continuing to bring scattered to numerous thunderstorms each day. Mainly east and southeast winds today will turn to southwesterly in the afternoon, then after light and variable winds on Sunday, east and southeast flow will return Monday through Wednesday of next week. Wind speeds will generally remain less than headline criteria, although daily thunderstorms will produce locally higher winds and rough seas.
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.FIRE WEATHER... Issued at 314 AM EDT Sat Sep 6 2025
Deep moisture holding over the area will bring scattered to numerous thunderstorms to the area each day this weekend. No humidity concerns.
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.PRELIMINARY POINT TEMPS/POPS... TPA 91 78 91 77 / 70 40 60 30 FMY 90 77 89 75 / 80 50 70 40 GIF 92 75 92 75 / 80 40 70 30 SRQ 90 77 89 75 / 70 40 60 30 BKV 92 72 91 71 / 70 40 60 30 SPG 88 77 88 76 / 70 40 50 30
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Sea Breeze Thunderstorm Regime For Saturday: 6 Sea Breeze Thunderstorm Regime For Sunday: 4
For additional information on sea breeze regimes, go to: https://www.weather.gov/tbw/ThunderstormClimatology
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.TBW WATCHES/WARNINGS/ADVISORIES... FL...None. Gulf waters...None.
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Fleming
NWS TBW Office Area Forecast Discussion