BBS: TELESC.NET.BR Assunto: DAY48SVR: Nws Storm Prediction Center Norman Ok De: COD Weather Processor Data: Sat, 21 Mar 2026 08:31:49 +0000 ----------------------------------------------------------- ACUS48 KWNS 210831 SWOD48 SPC AC 210829 Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0329 AM CDT Sat Mar 21 2026 Valid 241200Z - 291200Z ...DISCUSSION... ...Tuesday/Day 4 to Thursday/Day 6... An upper-level trough is forecast to move eastward into the western Atlantic from Tuesday into Wednesday, as a surface high moves eastward across the eastern U.S. A dry airmass is forecast across most of the U.S., which should be unfavorable for thunderstorms in most areas. On Thursday, a low is forecast to develop in the northern U.S., as low-level moisture returns quickly northward into the parts of the Great Plains and Mississippi Valley. Thunderstorms will be possible across this unstable airmass, mainly Thursday night, along the southern edge of a passing mid-level jet streak. The greatest potential for severe thunderstorms is expected from the mid Mississippi Valley into the Ohio Valley along and near a cold front. At this time, the amount of spread concerning potential outcomes is substantial. An area may need to be added once model solutions begin to agree more, and confidence increases concerning where the greatest severe threat will be. ...Friday/Day 7 and Saturday/Day 8... On Friday, the front is forecast to move southward across the Tennessee Valley, where isolated to scattered strong thunderstorms will be possible during the day. The front is forecast to move southward to near the Gulf Coast by Saturday. Isolated storms would again be possible near the front. Although the current thinking is that any severe threat will be marginal on Friday and Saturday, uncertainty is substantial due to the extended range in the forecast period. ..Broyles.. 03/21/2026 = = = 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]