Subj : DAY48SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Thu Sep 25 2025 09:09:57

ACUS48 KWNS 250909
SWOD48
SPC AC 250908

Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0408 AM CDT Thu Sep 25 2025

Valid 281200Z - 031200Z

....DISCUSSION...
Ridging will dominate much of the eastern 2/3rds of the CONUS during
the extended forecast period which will limit thunderstorm activity.
The exception will be across the Southeast United States into the
Mid-Atlantic where a weak cut-off low is forecast to persist into
next week. Some tropical moisture may advect northwestward and bring
some thunderstorm activity to portions of the Southeast into the
Carolinas and Mid-Atlantic. However, instability and shear should
both remain weak and limit any severe weather potential.

A large-scale western CONUS trough will shift east across the
northern Rockies by the middle of next week. This may result in some
thunderstorm activity along the lee trough. However, moisture (and
thus severe weather potential) should remain limited given continued
northerly flow across the Gulf of America and southern United
States.

...Bentley.. 09/25/2025

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