Area Forecast Discussion
Issued by NWS Birmingham, AL
Issued by NWS Birmingham, AL
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541 FXUS64 KBMX 271154 AFDBMX Area Forecast Discussion National Weather Service Birmingham AL 654 AM CDT Mon May 27 2024 ...New AVIATION... .SHORT TERM... (Today through Tuesday) Issued at 235 AM CDT MON MAY 27 2024 Very warm and moist conditions prevail across Central Alabama this morning with surface temperatures in the middle to upper 70s and surface dewpoints in the lower 70s. These conditions are producing surface based CAPE values of 2000-3000 J/kg and lifted indices of -4 to -7 Celsius, which are very robust for the middle of the night. Clusters of strong to severe storms were currently ongoing across northern MS and far northern AL. The activity will sink southward through the morning hours and into much of north AL. The models continue to show a weakening trend as the activity encounters the northern periphery of the upper ridge, and there is likely a warm nose around 850mb. Best chance of severe storms this morning will be for areas north of I-20. Low level helicity will stay highest across far north Alabama, so a low end tornado threat will exist for the far northern counties through the early morning hours. A surface front will push to near the I-20 corridor by early afternoon. The front will not contain cooler temperatures, but winds will become westerly and dewpoints will drop into the lower to middle 60s. Unstable conditions will continue south of the surface front with a threat for damaging winds and large hail. Areal coverage of storms will not be high, and kept rain chances in the 30-50 percent range. The storms will be confined to the southeast counties after 3 PM, with most of the activity out of Central Alabama by 9 PM CDT. Drier air will overspread all of central Alabama tonight and winds will become calm, which will allow temperatures to fall into the lower and middle 60s north and upper 60s south by Tuesday morning. A drier northwest flow on Tuesday will produce warm afternoon temperatures, with highs in the upper 80s to lower 90s, but more comfortable humidity levels. 58/rose && .LONG TERM... (Tuesday night through next Sunday) Issued at 124 AM CDT MON MAY 27 2024 High pressure builds in across the region Tuesday night and will persist through much of the upcoming week. This will lead to mostly dry conditions for Central AL with seasonably warm temperatures. Model guidance continues to hint at the potential for a weak shortwave sliding through the area Wednesday into Thursday, but there`s a lot of uncertainty in that occurring, so the forecast remains mostly dry through the period. Our next chance for rain/storms doesn`t come in until the end of the week and into next weekend. The ridge shifts slightly to our east, allowing for an upper wave to dip into the Mid-south at some point, but model guidance has gone back and forth on this feature, showing quite a bit of variability in timing and evolution. For now, I`ve continued to trend rain/storm chances up to 20-30% for next weekend, but I would expect several changes to that over the next few days. 25/Owen && .AVIATION... (12Z TAFS) Issued at 644 AM CDT MON MAY 27 2024 Scattered to numerous showers and storms will continue across east Alabama thru 14Z, mainly impacting KASN/KANB with heavy rainfall and frequent lightning. Beyond 14Z, the activity will be mostly isolated and for areas along and south of I-59 as a surface front approaches from the northwest. Widespread MVFR cigs thru 15Z will become lift and become VFR by 18Z. Sfc winds will become southwest at 8-12 kts sustained with gusts to 20 kts thru the afternoon. After 00Z, sfc winds will weaken considerably with minimal cloud cover. A few isolated storms may linger near KTOI thru 02Z. 58/rose && .FIRE WEATHER... Scattered to numerous showers and thunderstorms through the early evening hours. Some of the storms could produce damaging winds and locally heavy rainfall. 20 foot winds today will be from the south to southwest at 6 to 12 mph with gusts to 20 mph. Min RH today will be 50-60 percent and Max RH tonight near 100%. No wetting rain expected after 9 PM tonight tonight and lasting through Thursday. Northwest 20 foot winds 5-7 mph on Tuesday. && .PRELIMINARY POINT TEMPS/POPS... Gadsden 87 63 88 60 / 60 10 0 0 Anniston 87 65 88 61 / 60 10 0 0 Birmingham 88 67 89 64 / 50 10 0 0 Tuscaloosa 90 67 91 65 / 40 10 0 0 Calera 88 67 90 65 / 60 10 0 0 Auburn 84 68 89 65 / 50 20 0 0 Montgomery 88 69 92 65 / 50 20 0 0 Troy 87 68 91 65 / 50 30 0 0 && .BMX WATCHES/WARNINGS/ADVISORIES... None. && $$ SHORT TERM...58 LONG TERM....25 AVIATION...58/rose