ACUS02 KWNS 210551
SWODY2
SPC AC 210549

Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
1249 AM CDT Mon Sep 21 2026

Valid 221200Z - 231200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE SOUTHEAST...

...SUMMARY...
Isolated damaging gusts are possible over parts of the Southeast
tomorrow (Tuesday).

...Synopsis...
A low-amplitude mid-level trough will traverse the OH Valley as
upper ridging builds back over the Plains states, and another upper
trough meanders over the Southwest tomorrow (Tuesday). A surface
cold front will continue to drift southward across the southern
Appalachians into TX as high pressure ushers in a cooler and stable
airmass from the north. Isolated to widely scattered thunderstorms
will develop along and ahead of the cold front tomorrow afternoon.
Severe potential should remain sparse overall given poor vertical
wind shear along the cold front. However, a couple of damaging gusts
may accompany wet downbursts with the stronger storm cores over
parts of the Southeast, where upper 60s to low 70s F surface
dewpoints will contribute to 2000 J/kg MLCAPE.

..Squitieri.. 09/21/2026

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