Area Forecast Discussion
Issued by NWS Memphis, TN
Issued by NWS Memphis, TN
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236 FXUS64 KMEG 021501 AFDMEG Area Forecast Discussion National Weather Service Memphis TN 1001 AM CDT Sun Jun 2 2024 ...New UPDATE... .UPDATE... Issued at 1000 AM CDT Sun Jun 2 2024 Warm and humid conditions will continue today with current temperatures in the mid 70s to lower 80s. Today we will warm into the upper 80s with a few areas over northern Mississippi possibly reaching into the lower 90s. Surface high pressure will mainly dominate the Mid-South leading to mostly dry conditions today. A few pop up thunderstorms could possibly form along a shortwave in Nothern Mississippi through this evening. As winds go mostly calm and skies clear across the area overnight, fog may form along the Tennessee River and low lying areas. Current forecast package is on track. AEH && .SYNOPSIS... Issued at 440 AM CDT Sun Jun 2 2024 Warm and humid conditions will prevail through midweek. Thunderstorm chances will gradually increase Monday through Wednesday, as a series of upper level disturbances lift from the southern plains through the Midsouth and lower Ohio River Valley. Isolated severe thunderstorms will be possible along and west of the Mississippi River late Monday into early Tuesday morning. Damaging winds will be the primary severe weather threat. A weak cold front will pass through the Midsouth on Thursday. This front will bring slightly cooler temperatures and moderating humidity on Friday and the weekend. && .DISCUSSION... (Today through Saturday) Issued at 440 AM CDT Sun Jun 2 2024 A short wavelength upper level ridge will bring above normal temperatures to the Midsouth today, and continue the day to day reduction in thunderstorm chances. This ridge will be slower to lift out than previously expected, persisting most of the day Monday. With 850mb temperatures 1-3 C warmer than today, some parts of the Midsouth will reach 90 degrees Monday afternoon. Rain chances will edge up Monday night into Tuesday, with the approach of a broad upper level trough. This feature may be accompanied by convectively-enhanced vort maxima by the time it reaches the MS River late Monday night. NAM depicts ample PWAT and theta-e ridging in place over AR and most of the Midsouth, in support of locally heavy rainfall. Timing and coverage will be influenced by MCVs as well as differential heating later in the day Tuesday. Additional height falls will arrive Wednesday, around the southern periphery of a deep upper low developing over the northern Great Lakes. To what extent these height falls affect the Midsouth depends on the model. The latest deterministic ECMWF depicts the Great Lakes low to be weaker relative to earlier runs. Ensemble means from the ECMWF and GFS are in closer agreement than the respective deterministic solutions. But there is enough shift in the ECMWF guidance to influence the NBM toward warmer temperatures, particularly on Thursday. In any case, 60s dewpoints still appear on track for Friday, providing a brief break from our typical early summer humidity. PWB && .AVIATION... (12Z TAFS) Issued at 635 AM CDT Sun Jun 2 2024 Sporadic lightning flashes may occur over the next hour or so, as a persistent band of convection remains in the vicinity of MEM. Elsewhere, a lower stratus layer has been observed at TUP, with dense fog being reported at MKL. These conditions are expected to gradually improve throughout the morning. Guidance has hinted at convective activity later this afternoon, with another round of lower VIS and CIGS potentially impacting TUP and MKL later tonight. However, confidence in both of these situations remains low at this time. && .MEG WATCHES/WARNINGS/ADVISORIES... AR...None. MO...None. MS...None. TN...None. && $$ PUBLIC FORECAST...PWB AVIATION...JPR