Area Forecast Discussion
Issued by NWS Memphis, TN
Issued by NWS Memphis, TN
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800 FXUS64 KMEG 300433 AFDMEG Area Forecast Discussion National Weather Service Memphis TN 1133 PM CDT Mon Apr 29 2024 ...New UPDATE... .UPDATE... Issued at 1132 PM CDT Mon Apr 29 2024 Updated to issue a Dense Fog Advisory for all of the Midsouth. && .UPDATE... Issued at 905 PM CDT Mon Apr 29 2024 Scattered showers and isolated thunderstorms are trying to hang on across portions of the Midsouth, mainly along the Mississippi and Tennessee Rivers. Storms should continue to gradually diminish in coverage and intensity as they shift off to the east. High pressure is building in from the west and winds have already gone light across much of the region. Clouds may be a fly in the ointment, but otherwise conditions look favorable for fog tonight. Not quite ready to pull the trigger on a Dense Fog Advisory, but one may be required over the next several hours. Any fog should dissipate quickly after sunrise. Tomorrow looks dry with mainly clear skies by midday. Expect highs around 80 degrees. && .SYNOPSIS... Issued at 330 PM CDT Mon Apr 29 2024 Scattered showers and thunderstorms will continue through this evening as a cold front moves across the region. High pressure will build in across the Mid-South for Tuesday and Wednesday leading to dry conditions and above normal temperatures each day. Showers and thunderstorms will return to the region on Thursday and linger through Friday as a front stalls in the area. Scattered afternoon thunderstorms are possible this weekend as warm and humid conditions remain over the region. && .DISCUSSION... (This evening through next Sunday) Issued at 330 PM CDT Mon Apr 29 2024 Showers and scattered thunderstorms are ongoing across much of west Tennessee and north Mississippi at this hour. Another line of storms has developed over north central Arkansas along a cold front. Aloft, a well-defined shortwave was digging near the ArkLaTex region. This wave will help push the cold front through the entire Mid-South by tomorrow morning. There is the potential for some heavy rainfall this afternoon, mainly east of the Mississippi River, where good poleward moisture transport and instability match up reasonably well. 1 to 2 inches of rainfall is possible with locally higher amounts. Upper level high pressure will build in across the Lower Mississippi Valley for Tuesday and Wednesday, leading to dry and slightly above normal temperatures. Expect highs in the low to mid 80s each day with lows in the upper 50s and lower 60s. A southern stream impulse will quickly translate east across Baja California on Wednesday and lift northeast into the Lower Mississippi Valley on Thursday. This will spawn scattered showers and thunderstorms during the day for western portions of the forecast area. A large and nearly stationary upper low over the Northern Plains will eject several pieces of energy across the Mississippi Valley through this weekend. The first piece of energy will spawn a surface low across the northern Plains on Thursday afternoon and help to drive a cold front into the Lower Mississippi Valley through early Friday morning. The parent low will lift north into Canada and orphan the front over the Mid-South on Friday. The boundary will likely be a trigger for renewed convection on Friday afternoon due to daytime heating. The weather pattern will remain muddled through the weekend, as a warm and unstable air remains over the region, but upper level forcing remains weak. It was hard to argue against NBM 30-40 PoPs each afternoon, due to weak perturbations embedded in nearly zonal flow aloft. Organized weather does not look likely over the next week or so as the polar jet remains displaced to the north and west of our region. AC3 && .AVIATION... (06Z TAFS) Issued at 1127 PM CDT Mon Apr 29 2024 Shower activity is only effecting TUP and should come to an end over the next couple of hours. Ceilings and vsbys have began to deteriorate across the region. IFR and LIFR ceilings look likely as well as BR and FG. Any fog that develops will diminish quickly after sunrise. Winds will remain light and variable as high pressure settles in. VFR conditions will prevail after sunrise. DNM && .MEG WATCHES/WARNINGS/ADVISORIES... AR...Dense Fog Advisory until 8 AM CDT Tuesday for ARZ009-018-026>028- 035-036-048-049-058. MO...Dense Fog Advisory until 8 AM CDT Tuesday for MOZ113-115. MS...Dense Fog Advisory until 8 AM CDT Tuesday for MSZ001>017-020>024. TN...Dense Fog Advisory until 8 AM CDT Tuesday for TNZ001>004-019>022- 048>055-088>092. && $$ PUBLIC FORECAST...JDS AVIATION...DNM