659  
ACUS02 KWNS 281725  
SWODY2  
SPC AC 281723  
 
DAY 2 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK  
1223 PM CDT TUE SEP 28 2021  
 
VALID 291200Z - 301200Z  
   
..NO SEVERE THUNDERSTORM AREAS FORECAST
 
 
   
..SUMMARY
 
 
POTENTIAL FOR SEVERE THUNDERSTORMS WILL BE LOW ON WEDNESDAY.  
   
..SYNOPSIS
 
 
FOR WEDNESDAY A CLOSED LOW NOW OVER THE SOUTHERN ROCKIES WILL  
CONTINUE TO MOVE NORTH AND EAST AS IT PHASES WITH THE BROADER  
UPPER-LEVEL TROUGH ACROSS THE PACIFIC NORTHWEST. OVERALL CYCLONIC  
FLOW ACROSS THE GREAT BASIN AND SOUTHERN PLAINS WILL WEAKEN.  
DEEP-LAYER SOUTHERLY WINDS, THOUGH MODEST, WILL BE STRONGER IN  
PORTIONS OF THE CENTRAL AND NORTHERN PLAINS. AT THE SURFACE, A COLD  
FRONT WILL EXTEND ALONG THE MUCH OF THE HIGH PLAINS REGION INTO THE  
SOUTHERN GREAT BASIN. A WEAK SURFACE LOW IN THE SOUTHERN HIGH PLAINS  
WILL DEVELOP THROUGH THE DAY.  
   
..GREAT PLAINS
 
 
WARM ADVECTION AHEAD OF THE COLD FRONT IS LIKELY TO LEAD TO BROAD  
AREAS OF CLOUD COVER REDUCING BOUNDARY-LAYER DESTABILIZATION. WHILE  
THUNDERSTORMS ARE EXPECTED ALONG THE FRONT, UNIDIRECTIONAL SOUTHERLY  
WINDS IN THE TROPOSPHERE WILL PROMOTE TRAINING STORMS ALONG THE  
ROUGHLY NORTH-SOUTH ORIENTED BOUNDARY. FARTHER SOUTH INTO THE  
SOUTHERN HIGH PLAINS, GREATER BUOYANCY IS EXPECTED TO DEVELOP ALONG  
THE SURFACE TROUGH/DRYLINE. WITH THE TROUGH LIFTING NORTH, WIND  
SHEAR AND FORCING FOR ASCENT WILL REMAIN QUITE WEAK. WHILE AN  
OCCASIONAL STRONG STORM MAY OCCUR, THE POTENTIAL FOR SEVERE  
THUNDERSTORMS APPEARS LOW.  
 
..WENDT.. 09/28/2021  
 

 
 
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