Subj : DAY1SVR: Day 1 Convective Outlook To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Tue May 14 2024 16:29:57 ACUS01 KWNS 141629 SWODY1 SPC AC 141628 Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1128 AM CDT Tue May 14 2024 Valid 141630Z - 151200Z ....THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON INTO TONIGHT FOR THE TN VALLEY AND CENTRAL/NORTH FL... ....SUMMARY... Isolated damaging winds and large hail will be possible this afternoon/evening across the Tennessee Valley region, and through tonight across central/north Florida. ....FL through tonight... An initial MCS moved over north FL/southeast GA earlier this morning and has now weakened, with a trailing outflow boundary to the southwest across north FL. Other storm clusters across the eastern Gulf of Mexico have been moving eastward along the outflow boundary, though most of these storms have tended to weaken before approaching the west central FL Gulf coast. There will still be some potential for new storm development this afternoon along the outflow boundary, as well as along the Atlantic coast sea breeze across east central FL. Wind damage with 55-70 mph gusts will be the main threat with the storms along the outflow boundary. Sufficiently long and relatively straight hodographs will also support some potential for isolated splitting storms capable of producing isolated damaging gusts and some hail along the Atlantic coast sea breeze. Additional storms will be possible overnight across north FL. Will maintain a SLGT risk for wind damage potential with any additional clusters overnight, though there is uncertainty regarding the influence of ongoing/diurnal storms farther to the south. ....TN Valley region through late evening... A midlevel trough over the lower-middle MS Valley will move eastward today toward the lower OH/TN Valleys, along with an associated surface cyclone and trailing/weak cold front/trough. Pockets of surface heating along and east of the surface trough will boost MLCAPE into the 500-1500 J/kg range this afternoon, in an environment with sufficient vertical shear for a mix of small storm clusters and a few supercells. These storms will be capable of producing occasional large hail of 1-1.5 inches in diameter and damaging outflow gusts near 60 mph. ....Central High Plains and vicinity through late evening... A midlevel trough with embedded perturbations over ID and WY will move east-southeastward toward the central High Plains through tonight. Low-level moisture will remain somewhat limited, but surface heating/deep mixing will contribute to inverted-V profiles with sufficient buoyancy for high-based thunderstorms capable of producing isolated strong-severe outflow gusts of 50-60 mph this afternoon through late evening. ....Northern New England this afternoon... Surface heating and modest low-level moisture along and south of the main cloud band may support isolated strong thunderstorm development for a few hours this afternoon. Isolated/marginally severe hail and wind damage will be possible given MLCAPE near 500 J/kg, steepening low-level lapse rates, cool midlevel temperatures and effective bulk shear near 30 kt. ....The Caprock to the Edwards Plateau in TX this evening... Very isolated thunderstorm development will be possible along a diffuse dryline. Forcing for ascent and moisture will remain limited, but a high-based storm or two could pose a marginal wind/hail threat for a couple of hours this evening. ...Thompson/Barnes.. 05/14/2024 $$ = = = To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM. --- SBBSecho 3.20-Linux * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105) .