Subj : DAY48SVR: Nws Storm Prediction Center Norman Ok To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Mon Aug 25 2025 08:54:36 ACUS48 KWNS 250854 SWOD48 SPC AC 250853 Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0353 AM CDT Mon Aug 25 2025 Valid 281200Z - 021200Z ....DISCUSSION... ....Thursday/Day 4 to Saturday/Day 6... On Thursday, a large-scale mid-level trough is forecast to be in place over the eastern U.S., as a ridge remains over the central Rockies. A pocket of moderate instability could develop in the Ark-La-Tex Thursday afternoon, near an east-to-west front in the Red River Valley. Enough deep-layer is forecast for an isolated severe threat, but some uncertainty exists concerning the magnitude of any threat. The front is forecast to move southward into the Gulf Coast states on Friday. Thunderstorm development will be possible near the front from east Texas into Louisiana, where an isolated severe threat could again develop during the afternoon. However, deep-layer shear is forecast to remain relatively weak, would should keep any severe threat marginal. Further northwest on Friday, an axis of instability is forecast across the southern and central High Plains. Isolated to scattered thunderstorms could develop along and near this axis from late afternoon into the evening. This same potential will be possible on Saturday as the instability axis remains in place across the southern and central High Plains. The combination of instability and deep-layer shear is forecast to be sufficient for a marginal severe threat both on Friday and Saturday. ....Sunday/Day 7 and Monday/Day 8... From Sunday into Monday, a mid-level ridge is forecast to move eastward across the southern and central Plains. In the wake of this feature, scattered thunderstorms could develop across the High Plains near a north-to-south axis of instability. A marginal severe threat will be possible each afternoon and evening, but deep-layer shear is forecast remain relatively weak. This should be a limiting factor concerning any severe potential. ...Broyles.. 08/25/2025 = = = 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) .