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Area Forecast Discussion
Issued by NWS
Issued by NWS
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956 FXUS62 KTAE 151852 AFDTAE Area Forecast Discussion National Weather Service Tallahassee FL 252 PM EDT Mon Jul 15 2024 ...New NEAR TERM, SHORT TERM, LONG TERM, AVIATION, MARINE, FIRE WEATHER, HYDROLOGY... .NEAR TERM... (Through Tuesday) Issued at 202 PM EDT Mon Jul 15 2024 We`ll remain on the western periphery of the Bermuda high on Tuesday. Moisture will continue to pump in from the southwest, while showers and thunderstorms generally fire up along the seabreeze. Highs for Tuesday remain toasty in the mid 90s; however, the question remains how much will the seabreeze storms and cloud cover mess with the forecast in terms of heat index. Should these form early enough, we may either briefly or never realize heat index values of 105 to 112 in the western FL Panhandle, portions of SE AL, the first tier of our southern most counties in GA (Seminole to Lowndes), and the western FL Big Bend. Confidence is too low at this time to hoist a Heat Advisory at this time. && .SHORT TERM... (Tuesday night through Wednesday night) Issued at 202 PM EDT Mon Jul 15 2024 Mid and upper level troughing is expected to dig southward through the Great Lakes region Tuesday and Wednesday, which will start to lower 500 mb heights across the eastern Conus. This will similarly cause the Bermuda ridge to retreat eastward into the central Atlantic during this time. While much of the upper level forcing for ascent will be well to the north of the region, a frontal boundary associated with the upper level trough will lead to shower and thunderstorm chances Wednesday night primarily in SE Alabama and SW Georgia. With PWATs near 1.8-2 inches areawide, afternoon seabreeze thunderstorms will be likely across all Florida zones; however, the frontal boundary will likely bring a weakening line of showers and thunderstorms to SE Alabama and SW Georgia late Wednesday night. Current forecast DCAPE values are generally expected to be between 600-800 J/Kg, which is not particularly high enough to cause severe downbursts; however, strong winds will still be possible with the strongest storms that develop across the region Wednesday. High temperatures Wednesday will be their warmest, before an overall cooling trend starts, with highs peaking in the mid 90s areawide. && .LONG TERM... (Thursday through Sunday) Issued at 202 PM EDT Mon Jul 15 2024 The aforementioned mid and upper level trough will continue to progress eastward through the end of the work week before being re-enforced on Saturday and Sunday as an additional trough digs south into the great lakes Saturday. Through the middle to later half of the work week, the initial mid and upper level trough that digs into the Great Lakes region Tuesday and Wednesday remains fairly quasi-stationary, slightly lower 500 mb heights look to remain in place across the Deep South. This will keep high temperatures overall near seasonable levels in the low to mid 90s. This will similarly be in conjunction with increased rain chances, as the Bermuda ridge and surface high pressure system continually advect high PWATs from the deep tropics into the southeast through the extended. These increased PWATs will lead to increased shower and thunderstorm chances through the end of the work week and into the weekend. && .AVIATION... (18Z TAFS) Issued at 202 PM EDT Mon Jul 15 2024 Showers and thunderstorms developed along the seabreeze as expected this afternoon, with storms currently arriving in the western FL Big Bend. To the north, in SW GA, the airmass is moist and unstable, with a weaker signal of southwest winds being observed. Added in some TEMPOs for -TSRA but given observations were not showing MVFR status in the past, opted to only hint at the possibility of lower cig and vis with it. This may need to be adjusted as storms start to develop or move over nearby sites. Regarding timing, adjusted KECP to have VCTS end earlier and start the next round of sea breeze storms tomorrow morning. Elsewhere, confidence is lower in what might happen tonight. Ended up using a combination of the NAMNEST and HRRR for timing, though both ended up having different end time solutions. There`s a chance some storms could linger past sunset, but confidence was too low to adjust to that forecast. && .MARINE... Issued at 202 PM EDT Mon Jul 15 2024 Favorable marine conditions continue through the work week and into the weekend with overall light southwesterly winds around 5-10 knots expected. Seas will generally run less than 2 feet. Daily shower and thunderstorm chances are in the forecast, especially in the early morning hours, the next several days. These showers and thunderstorms will have the potential to produce waterspouts, and boaters should remain vigilant while out on the water as conditions can rapidly deteriorate in and around these thunderstorms. && .FIRE WEATHER... Issued at 202 PM EDT Mon Jul 15 2024 Outside of the possibility for elevated to high dispersions on Thursday, there are no fire weather concerns. Moisture will continue to increase each day, with showers and thunderstorms being possible each day. The highest chances will be over the FL counties and along the sea breeze, though chances increase inland at the end of the work week. && .HYDROLOGY... Issued at 202 PM EDT Mon Jul 15 2024 More moisture works back into the region this week, increasing chances for showers and thunderstorms each afternoon and evening. Localized street and nuisance flooding may be possible within any slow moving showers and thunderstorms, as is typical in the summer. No riverine flooding is expected in the next 7 to 10 days. && .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. && .PRELIMINARY POINT TEMPS/POPS... Tallahassee 76 94 76 95 / 20 70 10 70 Panama City 80 91 80 91 / 30 70 20 60 Dothan 75 95 75 95 / 30 70 10 70 Albany 76 94 75 95 / 30 60 20 60 Valdosta 76 95 75 96 / 30 60 20 60 Cross City 76 94 75 94 / 20 60 20 50 Apalachicola 80 89 79 90 / 30 70 20 60 && .TAE WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AL...None. GM...None. && $$ NEAR TERM...KR SHORT TERM...Bunker LONG TERM....Bunker AVIATION...KR MARINE...Bunker FIRE WEATHER...KR HYDROLOGY...Reese