Subj : DAY3SVR: Nws Storm Prediction Center Norman Ok To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Wed Sep 03 2025 19:31:33 ACUS03 KWNS 031931 SWODY3 SPC AC 031930 Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Sep 03 2025 Valid 051200Z - 061200Z ....NO SEVERE THUNDERSTORM AREAS FORECAST... ....SUMMARY... A couple strong thunderstorms will be possible from the Ohio/Tennessee Valleys to the southern Plains and across parts of Oregon on Friday, though the potential for organized severe storms appears low. ....Discussion... A broad midlevel trough centered on the Great Lakes region will shift slightly eastward through the period, as a midlevel speed maximum advances east-northeastward from the Great Lakes into Quebec. A related surface low will track northeastward from Ontario into Quebec, while a cold front extents southwestward across the OH Valley to a separate surface low in the southern Great Plains. Given a slow east-southeastward motion of the front and large-scale forcing for ascent lagging behind, thunderstorms may tend to be anafrontal. However, if any thunderstorms can develop along/immediately ahead of the front from the OH/TN Valleys into the southern Plains, ample moisture/buoyancy and around 30 kt of midlevel west-southwesterly flow would conditionally support a couple strong/loosely organized storms. Farther west, a midlevel trough will approach the Pacific Northwest through the period. Related forcing for ascent will promote scattered thunderstorms across OR. Moderately enhanced midlevel flow and steep deep-layer lapse rates may promote a couple strong storms capable of producing locally strong wind gusts. ...Weinman.. 09/03/2025 $$ = = = 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: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105) .