BBS: TELESC.NET.BR Assunto: DAY48SVR: Nws Storm Prediction Center Norman Ok De: COD Weather Processor Data: Wed, 1 Apr 2026 08:29:10 +0000 ----------------------------------------------------------- ACUS48 KWNS 010829 SWOD48 SPC AC 010827 Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0327 AM CDT Wed Apr 01 2026 Valid 041200Z - 091200Z ...DISCUSSION... Some degree of severe thunderstorm potential is expected to persist through the upcoming weekend across portions of the Great Lakes/OH Valley and possibly across the Mid-Atlantic. Heading into next week, a combination of building surface high pressure behind a synoptic cold front and the re-establishment of an upper ridge over the West will limit severe weather chances. ...D4/Saturday - Great Lakes/OH Valley... An upper wave and attendant surface low are forecast to quickly translate from the Plains into the Great Lakes region late Friday through Saturday. Moisture return immediately ahead of a trailing cold front will likely support some degree of destabilization Saturday afternoon across the Great Lakes/OH Valley; however, long-range ensemble guidance does not show high probability in surface/mixed-layer buoyancy values exceeding 1000 J/kg. Nonetheless, strong flow within the lowest 1-2 km will likely support a severe wind threat with any convection that can become sufficiently intense. While some severe risk is anticipated, the combination of a modest thermodynamic environment and disagreement regarding the timing/progression of the front through peak heating precludes risk probabilities. ...D5/Sunday - Mid-Atlantic... The synoptic cold front is forecast to push off the East Coast by late Sunday, though long-range guidance shows disagreement regarding the timing of the front. Slower solutions, such as the 00z ECMWF, suggest that the frontal passage may occur during the afternoon hours when diurnal destabilization will be greatest. Strong low-level flow coupled with robust broad-scale ascent ahead of the primary upper wave may support a band of strong to severe thunderstorms. However, the general consensus among guidance at this time is that this scenario is likely the outlier solution. ..Moore.. 04/01/2026 = = = 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]