338  
ACUS03 KWNS 220728  
SWODY3  
SPC AC 220727  
 
DAY 3 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK  
0227 AM CDT MON JUL 22 2019  
 
VALID 241200Z - 251200Z  
 
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PORTIONS OF  
THE NORTHERN PLAINS...  
   
..SUMMARY
 
 
ISOLATED SEVERE STORMS WILL BE POSSIBLE WEDNESDAY ACROSS PORTIONS OF  
THE NORTHERN PLAINS.  
   
..SYNOPSIS
 
 
THE EASTERN U.S. UPPER TROUGH WILL CONTINUE EAST TOWARDS THE  
MID-ATLANTIC/NORTHEAST COAST ON WEDNESDAY AS UPPER-LEVEL HIGH  
PRESSURE REMAINS ENTRENCHED OVER THE SOUTHWEST STATES. A BELT OF  
STRONGER MID-LEVEL FLOW WILL EXTEND FROM THE PACIFIC NORTHWEST INTO  
THE NORTHERN PLAINS, AND A PRONOUNCED SHORTWAVE TROUGH WILL MOVE  
EAST ACROSS THE CANADIAN ROCKIES ALONG THE INTERNATIONAL BORDER. A  
SURFACE FRONTAL BOUNDARY EXTENDING FROM NORTHERN FL WEST THROUGH  
SOUTH TX WILL MOVE LITTLE, WHILE A COLD FRONT, INITIALLY ACROSS THE  
NORTHERN ROCKIES, MOVES EAST INTO THE NORTHERN PLAINS WEDNESDAY  
NIGHT.  
   
..NORTHERN PLAINS
 
 
THE LARGE-SCALE RIDGE IS FORECAST TO FLATTEN SOMEWHAT WITH THE  
APPROACH OF THE PACIFIC NORTHWEST UPPER TROUGH AND MONSOON IMPULSES  
ROTATING AROUND THE UPPER-LEVEL ANTICYCLONE. WEAK/POCKETS OF  
MODERATE INSTABILITY SHOULD DEVELOP BY AFTERNOON ALONG A PRE-FRONTAL  
TROUGH AS DIURNAL HEATING OF UPPER 50S/LOWER 60S DEW POINTS TAKES  
PLACE. THUNDERSTORMS MAY DEVELOP ALONG THE PRE-FRONTAL TROUGH AND  
THE APPROACHING COLD FRONT, THOUGH AN EXPANDING EML AND INCREASING  
CINH MAY LIMIT OVERALL COVERAGE. ADEQUATE SHEAR (35-40 KTS) WILL BE  
IN PLACE FOR UPDRAFT ORGANIZATION AND SUPPORT AT LEAST SOME RISK FOR  
SEVERE STORMS.  
 
..BUNTING.. 07/22/2019  
 

 
 
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