BBS: TELESC.NET.BR Assunto: DAY3SVR: Nws Storm Prediction Center Norman Ok De: COD Weather Processor Data: Fri, 20 Mar 2026 07:21:09 +0000 ----------------------------------------------------------- ACUS03 KWNS 200721 SWODY3 SPC AC 200720 Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0220 AM CDT Fri Mar 20 2026 Valid 221200Z - 231200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE OHIO VALLEY... ...SUMMARY... Severe thunderstorms are expected on Sunday afternoon and evening across parts of the Ohio Valley. ...Ohio Valley/Mid Mississippi Valley... A mid-level shortwave trough is forecast to move southeastward into the upper Mississippi Valley on Sunday. Ahead of the trough, a cold front will advance southward into the Ohio Valley. As surface temperatures warm during the day, moderate instability is forecast to develop across much of the Ohio Valley. Increasing low-level convergence along the front during the afternoon will help thunderstorms to initiate, with storms increasing in coverage in the late afternoon and early evening. A large area of storms is expected to form along a corridor from southern Illinois east-northeastward into west-central Pennsylvania. Some of these storms will likely have a severe threat. Late afternoon forecast soundings in the Ohio Valley near Cincinnati, Ohio have MLCAPE increasing to near 1800 J/kg with 0-6 km shear in the 45 to 50 knot range. In addition, 700-500 mb lapse rates are forecast to be in the 7 to 7.5 C/km range. This environment should support supercells with large hail. The greatest hail threat may occur somewhat early in the event, when cells are more likely be discrete. A wind-damage threat is also expected, and could increase as storms congeal into a line during the early evening. A more isolated severe threat could develop further to the southwest into the mid Mississippi Valley during the late afternoon and early evening. ..Broyles.. 03/20/2026 $$ = = = 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 3.28-Linux * Origin: Capitol City Online (1:2320/107) ----------------------------------------------------------- [Voltar]