569
ACUS48 KWNS 210747
SWOD48
SPC AC 210745

Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0245 AM CDT Mon Sep 21 2026

Valid 241200Z - 291200Z

...DISCUSSION...
Upper ridging will persist over the central U.S. while a mid-level
cut-off low continues to meander just off of the Mid-Atlantic
coastline and multiple mid-level troughs traverse the Pacific
Northwest later this week into early next week. Through the Days 4-8
period, moisture return will be most prevalent over the Plains
states given surface lee troughing, and it is here where
thunderstorms will be most likely. However, the overall lack of
overlapping shear, buoyancy, and large-scale lift suggest that
organized severe potential is too low for the introduction of
probabilities this outlook.

..Squitieri.. 09/21/2026