Area Forecast Discussion
Issued by NWS Memphis, TN
Issued by NWS Memphis, TN
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169 FXUS64 KMEG 141739 AFDMEG Area Forecast Discussion National Weather Service Memphis TN 1239 PM CDT Fri Jun 14 2024 ...New AVIATION... .SYNOPSIS... Issued at 211 AM CDT Fri Jun 14 2024 Mostly dry and progressively hotter conditions are expected each day until Sunday. Rain chances return with slightly less hot conditions early next week. && .DISCUSSION... (Today through Thursday) Issued at 211 AM CDT Fri Jun 14 2024 Current GOES nighttime satellite depicts a decaying MCS dropping almost due south from the Middle Mississippi River Valley. Radar trends actually suggest a mesoscale boundary across southeastern Missouri that is halting the precip in its tracks as it tries to make southeastward progress. CAMs do not have a good handle on this rain shield`s development over the next few hours, but a low confidence 15% PoP was added along the northwestern edge of the CWA for the near term as this MCS continues gradually heading our way. Residual moisture this afternoon may lead to some localized diurnally driven convection along the AR/MO and KY/TN state lines, but confidence in this is again very low. Confidence is much higher for the heat tomorrow and Sunday. A stout midlevel ridge will build over the Mid-South starting tomorrow morning, trapping an unseasonably hot airmass in place for the remainder of the weekend. For context, NAEFS mean temperatures from the surface to 500 mb exceed the 90th percentile of climatology on Sunday. Afternoon highs will be in the mid 90s on Saturday, climbing to the upper 90s on Sunday. This isn`t necessarily record territory, but it is still a full 6-7 degrees above normal for mid June. Heat indices are expected to reach triple digits this weekend, especially Sunday. The potential for heat headlines is still low but will need to be monitored closely if the airmass overperforms and nudges temperatures above their forecasted values. The midlevel ridge looks to quickly shift to the east over the Mid-Atlantic on Monday. As it traverses the TN Valley and further amplifies while doing so, southerly flow will quickly set in on the west edge of the strong ridge. This will allow Gulf Coast moisture to surge up the Lower MS River Valley and support rain chances around 20-30% on Monday afternoon. Guidance continues to trend drier for the Mid-South next week, but given the higher moisture content aided by return flow, diurnally driven isolated thunderstorms cannot be ruled out any afternoon. We`ll see a gradual warming trend from the low 90s to the mid 90s throughout the course of the week. CAD && .AVIATION... (18Z TAFS) Issued at 1238 PM CDT Fri Jun 14 2024 Surface high pressure will result in continued light and variable winds throughout the period. A stray shower may occur near JBR this afternoon but confidence remains low. Light fog is possible at MKL near sunrise. ACH/AC3 && .MEG WATCHES/WARNINGS/ADVISORIES... AR...None. MO...None. MS...None. TN...None. && $$ PUBLIC FORECAST...CAD AVIATION...AC3/ACH