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ACUS03 KWNS 191912
SWODY3
SPC AC 191911

Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0211 PM CDT Sat Sep 19 2026

Valid 211200Z - 221200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE SOUTHERN/CENTRAL APPALACHIANS...

...SUMMARY...
Isolated severe gusts may accompany the stronger storms over parts
of the southern and central Appalachians on Monday.

...Central/Southern Appalachians...

Mainly zonal flow will overspread the eastern CONUS on Monday. While
weak westerly flow aloft is forecast, a surface cold front will
continue to develop southward across the Midwest, TN Valley and
central Appalachians/Mid-Atlantic regions. A moist airmass ahead of
the front, characterized by 60s to low 70s F dewpoints, will support
a corridor of moderate instability (1500-2500 J/kg MLCAPE) from the
eastern TN Valley toward the southern/central Appalachians. Where
stronger heating occurs, steepened low-level lapse rates are
forecast. Sufficient instability coupled with steep low-level lapse
rates and PW values around 1.75 inches may support sporadic strong
gusts from wet microbursts across parts of the TN Valley into
southern VA and western/central NC.

..Leitman.. 09/19/2026

$$