315  
ACUS02 KWNS 051642  
SWODY2  
SPC AC 051641  
 
DAY 2 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK  
1041 AM CST TUE DEC 05 2017  
 
VALID 061200Z - 071200Z  
   
..NO THUNDERSTORM AREAS FORECAST
 
 
   
..SUMMARY
 
 
THE RISK FOR SEVERE STORMS APPEARS NEGLIGIBLE ACROSS THE U.S.,  
WEDNESDAY THROUGH WEDNESDAY NIGHT.  
   
..DISCUSSION
 
 
HIGHLY AMPLIFIED MID/UPPER RIDGING APPEARS LIKELY TO PERSIST THROUGH  
THIS PERIOD AND BEYOND, ALONG AN AXIS NEAR THE PACIFIC COAST  
NORTHWARD THROUGH MUCH OF WESTERN CANADA. DOWNSTREAM, THE CENTER OF  
A LARGE AND DEEP LOWER/MID TROPOSPHERIC CYCLONE IS FORECAST TO  
CONTINUE MIGRATING NORTHEASTWARD, FROM NEAR JAMES BAY THROUGH  
NORTHERN QUEBEC BY LATE WEDNESDAY NIGHT. HOWEVER, IN ITS WAKE,  
CYCLONIC MID/UPPER FLOW WILL GENERALLY LINGER EAST OF THE GREAT  
BASIN THROUGH THE ATLANTIC SEABOARD, AND MODELS SUGGEST THAT THIS  
FLOW MAY SHARPEN ALONG A POSITIVELY TILTED TROUGH AXIS EXTENDING  
FROM THE UPPER MIDWEST INTO THE SOUTHERN ROCKIES AND ADJACENT  
PORTIONS OF THE SOUTHWEST/MEXICAN PLATEAU. IN ASSOCIATION WITH THIS  
REGIME, A SIGNIFICANT COLD FRONT IS FORECAST TO CONTINUE ADVANCING  
OFF THE SOUTH ATLANTIC COAST, THROUGH NORTHERN FLORIDA, AND THE  
NORTHWESTERN INTO CENTRAL GULF OF MEXICO, WITH GENERALLY DRY AND/OR  
STABLE CONDITIONS PREVAILING ACROSS MUCH OF THE U.S. IN ITS WAKE.  
EVEN AHEAD OF THE FRONT, ACROSS THE FLORIDA PENINSULA, FAIRLY MODEST  
LOW-LEVEL MOISTURE AND RELATIVELY WARM MID-LEVELS APPEAR LIKELY TO  
MINIMIZE THE RISK FOR THUNDERSTORM ACTIVITY.  
 
..KERR.. 12/05/2017  
 

 
 
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