Area Forecast Discussion
Issued by NWS Birmingham, AL
Issued by NWS Birmingham, AL
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420 FXUS64 KBMX 200815 AFDBMX Area Forecast Discussion National Weather Service Birmingham AL 315 AM CDT Mon May 20 2024 ...New LONG TERM... .SHORT TERM... (Today through Tuesday) Issued at 1235 AM CDT MON MAY 20 2024 The main storm system has exited the US and is in the Atlantic Ocean. There is a weak meso-low still in the southern fringe of the Appalachians, trapped by the high pressure building to the north, while high pressure also builds into the Southeast. For today, sunny skies will prevail with highs in the 80s. There is a slight chance that some isolated showers may develop on the outer edge of the meso-low. Most models remain dry, but a few have the outside chance. Opted to go with a 10 percent chance versus the 0 percent the model blends were offering up. Anything that does develop would quickly dissipate by sunset. As we move into the evening there could be some clouds that develop with the easterly flow across the east, with more of wedge influence, but should remain rain free. This wedge erodes on Tuesday and we are left with mostly sunny skies by the afternoon. Highs on Tuesday will be in the 80s to a few near 90 degrees in the west. 16 && .LONG TERM... (Tuesday night through next Sunday) Issued at 315 AM CDT MON MAY 20 2024 A low-level ridge will be situated across the Southeast on Wednesday, with southerly/southwesterly flow spreading from the Lower Mississippi Valley through the Ohio Valley, near an associated cold front. We`ll be in the upper 80s lower 90s that afternoon. The front will slowly progress east, facing resistance from a low- amplitude ridge across our region. Nonetheless, PWs and instability values make a slow increase across the Tennessee Valley, and by Thursday afternoon, some diurnal convection is possible. Only our far northwest/northern counties have mentionable PoPs Thursday. Medium-range guidance still depicts a shortwave perturbation moving across the I-40 corridor to our north on Friday. Convective coverage will increase as a result, but most activity still appears to remain to our north. Presence of the mid- to upper-level ridge will wane by Memorial Day weekend as guidance suggests a more zonal, split-flow aloft. Isolated to scattered diurnal convection is forecast Saturday and Sunday with highs in the upper 80s to lower 90s - very summer-like weather. 40/Sizemore && .AVIATION... (06Z TAFS) Issued at 1235 AM CDT MON MAY 20 2024 VFR conditions expected over the 24 hours with generally light winds from the east. We may see some clouds drop down to MVFR in the eastern TAFs just outside this cycle, so will evaluate that with the 12z set. && .FIRE WEATHER... Generally sunny skies for the first of the week. 20 foot winds will become east-southeast at 4-7 mph this afternoon, with Min RH values at 40-50 percent. Max RH overnight will be over 90 percent. 20 foot winds will be southeast at 3-6 mph Tuesday, with Min RH values at 35-45 percent. Next chance for wetting rain on Thursday across the far north, with a better chance on Friday. && .PRELIMINARY POINT TEMPS/POPS... Gadsden 86 59 88 61 / 10 0 0 0 Anniston 86 61 88 63 / 0 0 0 0 Birmingham 87 63 88 67 / 10 0 0 0 Tuscaloosa 88 64 88 66 / 10 0 0 0 Calera 86 63 87 66 / 10 0 0 0 Auburn 83 63 85 65 / 0 0 0 0 Montgomery 86 63 87 65 / 10 0 0 0 Troy 85 62 87 63 / 10 0 0 0 && .BMX WATCHES/WARNINGS/ADVISORIES... None. && $$ SHORT TERM...16 LONG TERM....40/Sizemore AVIATION...16