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Area Forecast Discussion
Issued by NWS Birmingham, AL
Issued by NWS Birmingham, AL
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559 FXUS64 KBMX 161752 AFDBMX Area Forecast Discussion National Weather Service Birmingham AL 1252 PM CDT Tue Jul 16 2024 ...New SHORT TERM, AVIATION... .SHORT TERM... (This afternoon through Wednesday) Issued at 1250 PM CDT TUE JUL 16 2024 Scattered to numerous thunderstorms are expected again this afternoon. Humid conditions are in place with generally weak west- southwest flow across the area. An upper-level low is situated to our west over the Lower MS River Valley which is seemingly dampening the ridge, although the ridge still has a foothold over the Deep South in the lower levels. With ample moisture, rain chances will remain elevated both today and tomorrow, especially during peak heating hours. Some storms could produce gusty winds which could knock down a few trees, much like yesterday, but these are routine summertime thunderstorms. The Heat Advisory remains in effect through this afternoon where some areas may reach heat indices up to 106F. Dewpoints look to be a couple degrees warmer tomorrow, but we`ll probably only reach the lower 90s by early afternoon due to the higher rain chances. So, it`s possible some areas could reach a heat index of 105F late tomorrow morning or early afternoon, but will hold off an issuing another Heat Advisory given the higher PoPs which should greatly reduce temperatures once storm outflow takes off, depending on where and how early storms initiate. 86/Martin && .LONG TERM... (Wednesday night through next Monday) Issued at 337 AM CDT TUE JUL 16 2024 The Lower Mississippi Valley and Deep South will remain in a favorable zone for active weather mid to late this week, mainly owing to the presence of an upper-level trough, an associated surface front, and moist, unstable air. These factors will support repeated cases of diurnal convection with best coverage anticipated on Thursday as the surface front move across the forecast area. The front should hang up to our south on Friday, stretching southwest to northeast. A shortwave is progged to advance across the frontal zone on Friday, embedded in an area of strengthening southwesterly flow aloft. Medium-range guidance keeps the primary trough axis to our west into this weekend, and this will provide opportunity for subsequent perturbations to pass over the area with continued moist, unstable air. Thus, the pattern will remain active with showers and thunderstorms in the forecast for the next several days. The trough and active weather will help keep temperatures moderated quite nicely, at least a few degrees below normal most days. 40/Sizemore && .AVIATION... (18Z TAFS) Issued at 1250 PM CDT TUE JUL 16 2024 Convection will produce intermittent impacts to TAF sites again this afternoon as TSRA expands in coverage over the next several hours. Some brief 20 to 30kt gusts may result from the storms, but overall winds will be light from the west-southwest at 5 to 8 kts. The activity diminishes after 03Z and flight conditions should improve after that. Convection may begin to redevelop again towards the end of this TAF period. Note: AMD LTD TO WIND AND VIS at KASN UFN due to missing ceilings. 86/Martin && .FIRE WEATHER... Rain coverage increases each day this week, as moisture increases with the approach of a front Wednesday into Thursday. Scattered to numerous convective coverage can be expected this afternoon. Minimum RH values will be near or above 50 percent today, with southwesterly 20 ft winds at 4-6mph. && .PRELIMINARY POINT TEMPS/POPS... Gadsden 72 93 70 89 / 20 70 60 80 Anniston 74 92 72 89 / 30 70 50 80 Birmingham 76 94 73 89 / 20 70 50 80 Tuscaloosa 74 93 73 89 / 20 70 50 80 Calera 75 92 74 89 / 30 70 50 80 Auburn 74 92 74 89 / 30 70 40 80 Montgomery 75 95 74 92 / 30 70 40 80 Troy 73 95 73 92 / 30 70 30 80 && .BMX WATCHES/WARNINGS/ADVISORIES... Heat Advisory until 9 PM CDT this evening for the following counties: Autauga-Barbour-Bibb-Blount-Bullock-Chilton-Coosa- Dallas-Elmore-Fayette-Greene-Hale-Jefferson-Lamar-Lowndes-Macon- Marengo-Marion-Montgomery-Perry-Pickens-Pike-Russell-Shelby-St. Clair-Sumter-Talladega-Tuscaloosa-Walker-Winston. && $$ SHORT TERM...86/Martin LONG TERM....40 AVIATION...86/Martin