BBS: TELESC.NET.BR Assunto: DAY48SVR: Nws Storm Prediction Center Norman Ok De: COD Weather Processor Data: Wed, 18 Mar 2026 07:19:56 +0000 ----------------------------------------------------------- ACUS48 KWNS 180719 SWOD48 SPC AC 180717 Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0217 AM CDT Wed Mar 18 2026 Valid 211200Z - 261200Z ...DISCUSSION... An upper ridge is forecast to break down across the Southwest late Saturday/D4 into Sunday/D5, with a weak wave embedded in the northwesterly flow regime aloft. During the same time, a stronger but low-amplitude feature will move rapidly east/southeast along the Canadian border, across the Great Lakes and into the Northeast. In association with the northern/Great Lakes disturbance, a cold front is forecast to push south into the Plains on Sunday/D5, extending into the OH Valley by late in the day. This front will interact with marginal moisture return across the Mid MS/OH Valleys, and continue into the Southeast on Monday/D6. This front is forecast to be roughly parallel to the upper flow, and would likely undercut thunderstorms that develop along it. MUCAPE on the order of 500-1000 J/kg seems reasonable, which will support marginal severe at best. For the latter days of the period, the forecast becomes less predictable, however, models on a run to run basis appear to be trending toward higher heights/possible ridging over the Southwest, with little to no threat of severe storms. ..Jewell.. 03/18/2026 = = = 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]