Area Forecast Discussion
Issued by NWS Mobile, AL
Issued by NWS Mobile, AL
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600 FXUS64 KMOB 161153 AFDMOB Area Forecast Discussion National Weather Service Mobile AL 653 AM CDT Mon Sep 16 2024 ...New AVIATION... .AVIATION... (12Z TAFS) Issued at 653 AM CDT Mon Sep 16 2024 Showers and thunderstorms are spreading across portions of southwest Alabama and the Florida Panhandle this morning along with a low stratus cloud deck. A mix of MVFR/IFR conditions are being reported in these areas with VFR conditions noted over far south central Alabama. Reductions to MVFR ceilings will likely linger into the mid morning hours before improving later this afternoon. Additional showers and storms will continue through the day and will result in local ceiling and visibility reductions. Another round of MVFR/IFR ceilings is expected to develop again late tonight and early Tuesday morning across the area. /14 && .PREV DISCUSSION... /issued 503 AM CDT Mon Sep 16 2024/ ..New NEAR TERM, SHORT TERM, LONG TERM, MARINE... NEAR TERM... (Now through Tuesday) Issued at 503 AM CDT Mon Sep 16 2024 An unsettled pattern will continue through early this week. Current water vapor imagery reveals two mid to upper lows across the region this morning with the first low (remnants of Francine) lingering along the eastern Arkansas and northwestern Mississippi and a second low (Potential Tropical Cyclone 8) positioned near the Carolina Coast. This places the area within a westerly to northwesterly flow aloft. As we go throughout the day, the upper low over the Carolinas will continue moving northwestward and eventually become phased with the low over the Mississippi Valley. Down in the lower levels, a frontal low pressure is currently positioned over coastal Mississippi with an associated surface boundary extending eastward across coastal Alabama and into the nearshore Gulf waters. Showers and a few thunderstorms have already started to develop across portions of southwest Alabama and along the coast this morning. Coverage is expected to increase in these areas and especially along the coast through the morning as a the upper low over northern Mississippi sinks southeastward and interacts with the stalled surface boundary. Additional scattered to numerous showers and storms are expected across the area this afternoon and into the evening hours. The main concern with this activity today will be heavy rainfall and instances of localized flooding especially in areas where storms repeatedly move over the same areas. Radar trends are already indicating some training cells near the coast where a Flash Flood Warning is currently in effect for southern portions of Santa Rosa County. This activity is producing efficient rain rates in a short amount of time and we could see additional flooding concerns as we go throughout the day. WPC has outlooked most of the area in a marginal risk for excessive rainfall today. Showers and thunderstorms will gradually diminish through the evening and overnight hours tonight, although there could be a few lingering cells focused near the coast. Rain chances will remain elevated on Tuesday with the base of the upper trough extending down into the local area and the surface boundary lingering near or along the coast. PWATs of 1.7-1.9 inches will be in place across the area Tuesday morning. This moisture combined with this boundary will aid in the development of scattered showers and storms through the day. The highest coverage of showers and storms looks to be focused along the coast and closer to the boundary. Slightly drier air may attempt to work its way into far interior portions of southwest and south central Alabama by Tuesday afternoon and this could help to limit rain chances in these areas. High temperatures this afternoon will be slightly below normal with values reaching into the lower to middle 80s. Overnight lows tonight fall into the middle 60s inland to lower 70s along the coast. Highs on Tuesday rise into the lower and middle 80s again. A low risk of rip currents continues through Tuesday. /14 LONG TERM... (Tuesday night through Sunday) Issued at 503 AM CDT Mon Sep 16 2024 An upper level low associated with the current potential tropical cyclone approaching the Carolinas will continue to pivot over the Appalachians Tuesday night/Wednesday morning before being picked up and absorbed into a larger scale trough over the eastern U.S. on Wednesday. This upper level trough will remain in place over the eastern U.S. through the latter part of the week. Upper level ridging will meanwhile continue to build from the Plains to the Mississippi Valley region mid to late week. Isolated to scattered showers and thunderstorms will be possible on Wednesday, especially near the coast along the persistent boundary. A much drier northwesterly to northerly flow aloft returns between the trough to our east and ridging to our west late Wednesday night through Saturday. We expect dry weather conditions to prevail during this time frame. Another upper level low may pinch over the Eastern Seaboard late this week and translate into the southeastern U.S. by the latter part of the weekend. There currently does not appear to be a lot of moisture available on the western side of this system Sunday, but perhaps just enough to support a slight chance of showers and thunderstorms mainly over southern portions of our forecast area by Sunday afternoon. Highs will mostly range in the mid 80s to near 90 degrees each day, with lows mainly in the 60s over interior areas and lower 70s along the immediate coast and beaches. /21 MARINE... Issued at 503 AM CDT Mon Sep 16 2024 Main impacts will primarily be for the first half of the week with scattered to numerous thunderstorms, bringing brief strong wind gusts and locally higher seas. Aside from storms, winds expected to be 10 knots or less and seas a foot or less. /14 && .PRELIMINARY POINT TEMPS/POPS... Mobile 84 70 85 69 87 69 90 68 / 60 40 50 10 20 0 10 0 Pensacola 82 72 84 72 86 72 89 71 / 80 40 50 10 20 0 10 0 Destin 83 73 84 73 86 73 89 72 / 60 40 40 20 20 0 10 0 Evergreen 83 66 86 67 89 65 90 64 / 70 30 30 10 20 0 10 0 Waynesboro 82 66 85 66 88 65 88 64 / 70 30 30 0 20 0 0 0 Camden 81 65 85 65 86 64 87 63 / 60 20 20 0 20 0 0 0 Crestview 82 67 86 67 88 67 90 65 / 70 40 50 10 30 0 10 0 && .MOB WATCHES/WARNINGS/ADVISORIES... AL...None. FL...None. MS...None. GM...None. && $$ This product is also available on the web at: www.weather.gov/mob