393 FXUS62 KTAE 121348 AFDTAEArea Forecast Discussion National Weather Service Tallahassee FL 948 AM EDT Fri Sep 12 2025
...New UPDATE...
.UPDATE... Issued at 947 AM EDT Fri Sep 12 2025
The forecast is in good shape and no updates are planned.
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.NEAR TERM... (Today and tonight) Issued at 1218 AM EDT Fri Sep 12 2025
Persistence will be a good forecast for today and tonight.
Water vapor imagery and upper air balloon data show a longwave 500 mb trough axis extending down the Appalachians and into the the western FL Panhandle. A shortwave digging south into northern Georgia will further amplify the longwave trough. This will deepen the surface trough extending northeast from the Bahamas enough to strengthen the dry N-NE low-level flow over our region. This will continually reinforce the dry continental air mass over the region. The dry air mass and full sunshine will support another afternoon in the upper 80s-lower 90s, and a pleasantly cool night tonight in the 60s.
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.SHORT TERM and LONG TERM... (Saturday through next Thursday) Issued at 1218 AM EDT Fri Sep 12 2025
Day-to-day changes in sensible weather will be small and gradual. No hazardous weather is expected for the next 7 days. Low-level NE flow and a dry air mass will amount to cooler-than-normal nighttime temperatures, hotter-than-normal afternoon temperatures, and no rain through at least the first half of next week. Some increase in moisture is likely during the second half of next week, enough for low rain chances over our Florida and far south Georgia counties starting around next Thursday or Friday.
For the entire period, a 500 mb trough axis will persist from the coastal Carolinas down to NE Florida. This trough will reach peak amplitude over the weekend, and our upper heights will be lowest too. N-NE surface flow will be strongest on Saturday, continually reinforcing the dry continental air mass. Pleasantly cool mornings in the 60s and seasonably hot afternoons in the upper 80s-lower 90s will prevail. Surface dewpoints in the upper 50s to mid 60s will not be muggy enough to contribute to the heat index.
Slowly over the course of next work week, the 500 mb trough will deamplify and become more detached from the main mid-latitude jet stream. Upper heights will rise modestly, and low-level flow will take on a more maritime-influenced easterly component. Dewpoints will creep up through the 60s, and so nighttime and morning temps will slowly trend upward. It will take until Wednesday and Thursday of next week for GEFS 75th percentile Precipitable Water (PW) values to creep up near 1.5 inches over our FL and far south GA counties. So low PoPs will return to the forecast in those counties as soon as Thursday. The main question with moisture is seeing how far north the very moist air mass over South FL can expand later next week.
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.LONG TERM...
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.AVIATION... (12Z TAFS) Issued at 640 AM EDT Fri Sep 12 2025
Prevailing VFR conds continue thru the period with minimal cloud cover. Light and variable winds increase to around 10 kts later today. Occasional gusts of 15-20 kts are possible. A brief period of patchy fog/mist may impact VLD around sunrise.
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.MARINE... Issued at 1218 AM EDT Fri Sep 12 2025
Northeast flow will persist through Tuesday in the pressure gradient between high pressure to the north and a persistent trough of low pressure extending northeast from the Bahamas. Northeast flow is favorable for nighttime and morning surges of wind off the land, and relative lulls during the afternoon. Winds will peak as fresh breezes on Saturday and Sunday mornings.
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.FIRE WEATHER... Issued at 1218 AM EDT Fri Sep 12 2025
Many districts have gotten through the first 11 days of September with no rain, and no rain is expected through at least Tuesday of next week.
From today through this weekend, a persistent pattern of gusty northeast winds and full sunshine will support high afternoon dispersion. The air mass will be dry, with Min RH values well below 40 percent for all but southeast Big Bend districts. The strongest winds and lowest RH will come on Saturday afternoon. It will take until about Wednesday or Thursday of next week to even get a low chance of rain over our Florida and far south Georgia districts.
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.HYDROLOGY... Issued at 1218 AM EDT Fri Sep 12 2025
No flooding is expected for the next 7 days.
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.SPOTTER INFORMATION STATEMENT...
Spotter activation is not requested. However, spotters are always encouraged to safely report significant weather conditions when they occur by calling the office or tweeting us @NWSTallahassee.
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.PRELIMINARY POINT TEMPS/POPS... Tallahassee 90 66 89 64 / 0 0 0 0 Panama City 91 70 90 67 / 0 0 0 0 Dothan 90 64 88 62 / 0 0 0 0 Albany 89 64 88 61 / 0 0 0 0 Valdosta 89 64 88 62 / 0 0 0 0 Cross City 90 67 89 65 / 10 0 20 0 Apalachicola 88 71 87 69 / 0 0 0 0
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.TAE WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AL...None. GM...None. &&
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NEAR TERM...Haner SHORT TERM...Haner LONG TERM....Haner AVIATION...IG3 MARINE...Haner FIRE WEATHER...Haner HYDROLOGY...Haner
NWS TAE Office Area Forecast Discussion