Area Forecast Discussion
Issued by NWS
Issued by NWS
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397 FXUS62 KTAE 061417 AFDTAE Area Forecast Discussion National Weather Service Tallahassee FL 1017 AM EDT Thu Jun 6 2024 ...New UPDATE, MARINE... .UPDATE... Issued at 958 AM EDT Thu Jun 6 2024 Late-morning vapor and radar imagery depicts a mid-level shortwave trough moving east across the MS Valley with attendant broken lines of showers and thunderstorms. This activity crosses the border from NWS MOB/BMX`s area of responsibility within the next hr. Per current SPC mesoanalysis, the environment is adequately moist (1.6-1.8" Precipitable Water) and unstable (1500-3000 J/kg CAPE). Additionally, the DCAPE ranges from about 800-1000 J/kg while mid-level lapse rates are up to 7 C/km. These parameters support the potential for several strong thunderstorms capable of gusty winds, small hail, locally heavy rain, and frequent lightning. Isolated severe gusts would not be surprising either. Guidance continues to favor the best convective coverage from SW to NE this afternoon. The main change to today`s forecast was trimming back rain chances over Apalachee Bay where no convection is evident and likely to remain minimal into the evening. && .NEAR TERM... (Today and tonight) Issued at 306 AM EDT Thu Jun 6 2024 A 500 mb shortwave vorticity maxima currently over southern Mississippi and Louisiana will dive southeast today towards the Florida Peninsula. In doing so, there will be enhanced forcing for ascent across the region given the differential vorticity advection present. This combined with elevated PWATs in the 1.6-1.8 inch range will lead to decent chances for scattered showers and thunderstorms today. PoPs are particularly high 60-80 percent for areas west of the Flint and Apalachicola rivers, and 40-60 percent for areas east of those rivers. With DCAPE values approaching 1000 J/Kg today, some of these thunderstorms could produce gusty winds with the strong downbursts. The primary hazards today will be the potential for gusty winds and localized flash flooding from heavy downpours over poor drainage areas. Storm motions look to be fast enough today that excessive rainfall is unlikely. Overall, with shower and thunderstorm coverage expected across the Florida Panhandle, SE Alabama and extreme SW Georgia, high temperatures will struggle to reach 90, with most staying in the mid to upper 80s. Areas further east will likely reach the low 90s as cloud cover is expected to be more sparse through the afternoon hours. Lows tonight will generally fall into the low 70s areawide. && .SHORT TERM... (Friday through Saturday night) Issued at 306 AM EDT Thu Jun 6 2024 Weak frontal boundary pushes through the forecast area on Friday as a broad east-coast trough translates into the Atlantic. While rain chances taper off greatly compared to Thursday, a few pop- up showers and storms are possible across the Big Bend where drier mid-level air advecting in from the northwest will take longer to reach. Drier northwest flow on Saturday keeps rain chances near zero across the entire forecast area. With dry conditions, expect max temperatures to be a few degrees warmer across Florida and in the mid 90s, with the low to mid 90s across AL/GA counties. && .LONG TERM... (Sunday through Wednesday) Issued at 306 AM EDT Thu Jun 6 2024 The beginning of the long term period will start out fairly quiet with northwest flow keeping the bulk of the deep-layer moisture south of the region. With dry conditions the heat will remain with widespread mid to upper 90s expected on Sunday. Weak moisture return and a few passing disturbances in the northwest flow could bring an increase in rain chances on Monday and Tuesday as a weak frontal boundary drops in from the north and stalls. With the increasing rain chances max temperatures drop a few degrees and back into the low 90s. Looking further ahead into the middle and latter part of next week, attention possibly turns to the tropics. While much too early to determine any sort of specifics, model ensembles are indicating the possibility of increasing tropical moisture from the south. Whether this turns into anything is much too early to determine but it`s possible we`ll at least see a notable increase in rain chances from Wednesday onwards as deep-layer moisture streams in from the south. && .AVIATION... (12Z TAFS) Issued at 642 AM EDT Thu Jun 6 2024 MVFR to IFR CIGs are currently being observed at DHN, ABY, and VLD this morning as a low cloud deck has quickly developed across SE Alabama and SW Georgia. These restrictions should lift in the next 1-2 hours. VFR conditions look to remain for the rest of today; however, scattered showers and thunderstorms are expected to develop by 14 utc for DHN and ECP, and push eastward to all other terminals by the early afternoon. Coverage of thunderstorms looks to diminish within 1-2 hours of 00 utc this evening. Thunderstorms in the vicinity of airports may lead to brief MVFR to IFR restrictions. Outside of thunderstorm activity all terminals look to remain VFR. DHN could see more low CIGs develop Friday morning that may lead to LIFR restrictions. && .MARINE... Issued at 958 AM EDT Thu Jun 6 2024 Offshore buoys were reporting SW winds generally between 10-15 kts with 1-3-ft seas and a dominant period 5-6 seconds late this morning. Satellite and radar show maritime convection moving east near Mobile Bay-Pensacola. This activity aims to enter the Okaloosa-Walton County waters within the next 2 hrs and pose a gusty wind and lightning threat. From CWF Synopsis...Light winds and seas are anticipated through most of the period with the only marine concerns generally being scattered showers and storms this afternoon and again on Friday. Mostly dry conditions expected for the weekend with light northerly winds on Saturday becoming southerly in nearshore waters as the seabreeze develops. Rain chances slowly return early next week as moisture and winds increases from the south. && .FIRE WEATHER... Issued at 306 AM EDT Thu Jun 6 2024 Transport winds will predominantly be out of the southwest at around 10-15 mph today. Mixing heights east of the Flint and Apalachicola rivers will climb to around 4000-5500 ft; however, areas west of those aforementioned rivers can expect to see mixing heights around 2500-4000 ft. This will lead to much higher dispersions across areas east of the Flint and Apalachicola rivers today where high mixing heights and transport winds overlap. Minimum RH values will likely only bottom out in the low 50s to low 60s across the region today as a moist airmass remains in place ahead of a passing front today. Expect isolated to scattered showers and thunderstorms from the early morning hours to potentially the early evening hours as the slow moving front progresses southeastward throughout the day. Overall, outside of the high dispersions, there are no fire weather concerns today. && .HYDROLOGY... Issued at 306 AM EDT Thu Jun 6 2024 Locally heavy rainfall could materialize Thursday into Friday with the passage of a front proving a focus for scattered to widespread showers and thunderstorms. Temporarily dry conditions are expected this weekend before a wet pattern possibly arrives next week. Flooding concerns may be on tap for us by then. In terms of rivers, a few in the Suwannee basin remain in action stage, but continue on a downward trend. && .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 92 73 94 70 / 60 20 40 10 Panama City 86 75 90 72 / 70 40 20 10 Dothan 88 71 92 66 / 80 20 10 0 Albany 91 72 93 66 / 70 20 20 0 Valdosta 93 73 93 69 / 40 30 40 10 Cross City 93 73 92 71 / 30 20 70 10 Apalachicola 86 76 88 74 / 60 50 40 10 && .TAE WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AL...None. GM...None. && $$ UPDATE...IG3 NEAR TERM...Bunker SHORT TERM...Dobbs LONG TERM....Dobbs AVIATION...Bunker MARINE...Dobbs/IG3 FIRE WEATHER...Bunker HYDROLOGY...IG3