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