Current SPC Activity Chart

Current Severe US Wx Maps

SPC Activity Chart
Hazard Wed (11/21) Thu (11/22) Fri (11/23) Sat (11/24) Sun (11/25) Mon (11/26) Tue (11/27) Wed (11/28)
Severe No Severe No Severe No Severe No Area No Area No Area No Area No Area
Fire No Critical No Critical No Area No Area No Area No Area No Area No Area

Forecast Discussion - Convective Outlook

   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...

   ...SUMMARY...
   Isolated thunderstorms are possible today from coastal into central
   California, and across parts of southeast Texas.

   ...Synopsis/Forecast...
   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
   snow.

   ..Guyer/Wendt.. 11/21/2018

    

   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 2000Z