Subj : MESO: Mesoscale Discussion 1354 To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Wed Jun 18 2025 22:24:38 ACUS11 KWNS 182224 SWOMCD SPC MCD 182224=20 OHZ000-MIZ000-KYZ000-INZ000-190000- Mesoscale Discussion 1354 NWS Storm Prediction Center Norman OK 0524 PM CDT Wed Jun 18 2025 Areas affected...southeastern Lower Michigan into western and central Ohio Concerning...Severe Thunderstorm Watch 436...437... Valid 182224Z - 190000Z The severe weather threat for Severe Thunderstorm Watch 436, 437 continues. SUMMARY...Severe gusts should continue with an ongoing, mature MCS for several more hours. A few instances of marginally severe hail and perhaps a tornado, also remain possible. DISCUSSION...A mature QLCS, with a history of widespread severe gusts, continues to progress eastward amid a moderately unstable airmass, characterized by over 2500 J/kg MLCAPE. Boundary layer lapse rates remain in the 7-7.5 C/km range over 300 km ahead of the line (to the OH/PA border). Since nocturnal cooling will not set in for at least a few more hours, several more strong to severe gusts are likely. A couple instances of marginally severe hail are also possible, and a QLCS tornado cannot be ruled out. ...Squitieri.. 06/18/2025 ....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!6m5IXaYgTyWDHluLGmBhFmH-6KoKyVHOWXn3KZTxLps29tO9owJUeMExEgDFcifzqMio18Ilq= YFdtHFfGr1qtom0sbI$ for graphic product... ATTN...WFO...CLE...ILN...DTX...LMK...IWX...GRR...IND... LAT...LON 38648511 40708487 41868469 42418490 42948475 43208445 43218371 42608318 41508279 40508263 39268305 38748318 38528367 38518447 38648511=20 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN =3D =3D =3D 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) .