SPC AC 211629
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1029 AM CST Wed Nov 21 2018
Valid 211630Z - 221200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
Isolated thunderstorms are possible today from coastal into central
California, and across parts of southeast Texas.
A weak southern-stream shortwave trough will move eastward to the
northwest Gulf Coast by tonight, in advance of a larger-scale trough
that will progress eastward and inland over CA. Steepening
low/mid-level lapse rates with the CA trough will support a threat
for isolated thunderstorms this afternoon into tonight. Along the TX
coast, a modifying low-level air mass and a low-level warm advection
regime will contribute to weak destabilization atop a coastal front.
A few elevated thunderstorms will be possible from this afternoon
into tonight. Elsewhere, a stray lightning strike or two cannot be
entirely ruled out across northern NY into New England in
association with shallow convection related to fast-moving bands of
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 2000Z