Area Forecast Discussion
Issued by NWS
Issued by NWS
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747 FXUS62 KTAE 031951 AFDTAE Area Forecast Discussion National Weather Service Tallahassee FL 351 PM EDT Fri May 3 2024 ...New NEAR TERM, SHORT TERM, LONG TERM, FIRE WEATHER, HYDROLOGY... .NEAR TERM... (Through Saturday) Issued at 248 PM EDT Fri May 3 2024 Vapor imagery this afternoon depicts a storm system attendant to its shortwave trough traversing eastward across the Lower MS Valley with a downstream ridge axis bisecting the Coastal Carolinas down to the FL Peninsula. These features are making for warm/moist conditions with a mix of cloudiness, and isolated showers & thunderstorms today. The latter is seabreeze driven, initially focused mostly along the Eastern FL Big Bend before drifting towards the I-75 corridor into the early evening hrs. Additional cell development is possible from remnant outflow boundaries during that time. Lingering showers are possible tonight from the west as the aforementioned shortwave pivots NE through the Wiregrass. A muggy airmass will make for an unseasonably warm overnight/early-morning period with widespread forecast lows in the upper 60s, or about 10- 12 degrees above normal! Patchy fog is also forecast to develop in the pre-dawn hrs from Southern AL/Emerald Coast, then spreading to the FL Big Bend into parts of South-Central GA. Dissipation should occur within a couple hrs after sunrise. For tomorrow, expect greater coverage of showers and thunderstorms thanks to some upper-level support provided by the lifting shortwave, afternoon seabreeze, and sufficient daytime instability amidst a moist airmass. These parameters should support deep convection capable of strong/gusty winds, frequent lightning, and locally heavy downpours. The latter could produce localized high rain amounts exceeding 1 inch. Minimal vertical wind shear precludes severe weather concerns, but several strong storms (perhaps isolated "pulse" severe) are likely. The best chances are along the interstate corridors, followed by a northward drift past the FL state line. Aside from storm activity, temperatures peak in the mid/upper 80s. && .SHORT TERM... (Saturday night through Sunday night) Issued at 248 PM EDT Fri May 3 2024 Another shortwave will move across the mid-South Sunday into Sunday evening, which will bring another enhancement to our chances for showers and storms Sunday afternoon. The highest rain chances will be across southwest GA and the eastern FL Big Bend. Some mid-level dry air as well as inverted-V profiles on forecast soundings may lead to some gusty wind potential Sunday afternoon. Otherwise, it will continue to be warm and humid with highs in the upper 80s and lows in the mid to upper 60s. && .LONG TERM... (Monday through Thursday) Issued at 248 PM EDT Fri May 3 2024 One more shortwave traverses the Tennessee and Ohio Valleys Monday afternoon, which provides another boost to our rain chances. However, forecast soundings don`t appear as conducive for gusty winds given less mid-level dry air and more moisture near the surface. Highs Monday will be in the upper 80s with lows in the mid to upper 60s. Beyond Monday, strong ridging takes hold of the area, shutting off the rain and bringing increasing heat through the middle to latter part of the week. Ensemble guidance indicates that we may see 500 mb heights near 589-590 dam, which is close to record heights for this time of year based on SPC`s sounding climatology. Similarly, 850 mb temperatures will be in the 18-22C range, which is also near record levels for this time of year. All that to say, it`s going to be hot. Highs will climb in to the lower to middle 90s, and with dew points near 70, heat index values could approach 100 in some areas. Lows will also climb into the upper 60s to lower 70s. && .AVIATION... (18Z TAFS) Issued at 141 PM EDT Fri May 3 2024 Mainly VFR conds away from t-storms with a south to SW wind and mix of upper/lower clouds. Isolated convection is expected to focus mainly around the interstate corridors this aftn. Highest confidence in being impacted by thunder is VLD where an evening tempo group was introduced amidst prevailing VCTS. Lingering showers appear likely tonight, then MVFR cigs/vsbys aim to develop in the pre-dawn hrs at ECP/TLH. Better convective coverage is fcst tmrw just after the end of this TAF cycle. && .MARINE... Issued at 351 AM EDT Fri May 3 2024 High pressure in the Atlantic will lead to tranquil boating conditions through the period. Light winds, generally out of the south-southeast, are expected with seas around 1 to 3 feet into the weekend. There is a slight chance of showers and thunderstorms Saturday and Sunday. && .FIRE WEATHER... Issued at 248 PM EDT Fri May 3 2024 Afternoon and early evening thunderstorms capable of gusty/erratic winds and lightning will be the main fire concerns the next 3 days. For tomorrow, convection aims to focus along the interstate corridors after seabreeze initiation on the Big Bend side, then drifting north past the FL state line. Convective potential is expected to be greater compared to today. Wetting rains are also possible. Additional rounds of diurnal showers/thunderstorms are forecast Sunday-Monday, albeit lesser coverage, but targeting roughly the same locations as Saturday. Otherwise, look for hot daytime conditions with highs in the upper 80s away from the immediate coast, southerly winds, and a daily afternoon seabreeze. High dispersions are forecast over parts of SE AL/FL Panhandle Monday afternoon. && .HYDROLOGY... Issued at 248 PM EDT Fri May 3 2024 Abundant moisture will be in place with a decent coverage of showers and storms this weekend. While widespread totals of 0.5 to 1 inch, localized totals if storms are slow moving could reach 2 to 3 inches in a short period of time. This could result in some nuisance flooding of poor drainage or urban areas. Otherwise, no additional flood concerns are expected. && .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 69 86 67 88 / 10 60 20 40 Panama City 69 83 67 85 / 10 20 0 10 Dothan 68 89 65 88 / 20 40 10 40 Albany 69 87 67 88 / 30 70 30 50 Valdosta 68 86 67 88 / 40 70 30 60 Cross City 66 87 66 88 / 10 50 20 50 Apalachicola 69 80 69 82 / 10 10 0 10 && .TAE WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AL...None. GM...None. && $$ NEAR TERM...IG3 SHORT TERM...Young LONG TERM....Young AVIATION...IG3 MARINE...Reese FIRE WEATHER...IG3 HYDROLOGY...Young