721  
ACUS03 KWNS 060716  
SWODY3  
SPC AC 060715  
 
DAY 3 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK  
0115 AM CST WED DEC 06 2017  
 
VALID 081200Z - 091200Z  
   
..NO SEVERE THUNDERSTORM AREAS FORECAST
 
 
   
..SUMMARY
 
 
THUNDERSTORMS ARE POSSIBLE ACROSS THE CENTRAL AND SOUTHERN PORTIONS  
OF THE FLORIDA PENINSULA FRIDAY EVENING AND OVERNIGHT.  
   
..SYNOPSIS
 
 
A HIGHLY AMPLIFIED PATTERN, FEATURING AN UPPER RIDGE CENTERED OVER  
NORTHERN CA AND A LARGE, POSITIVELY TITLED UPPER TROUGH EXTENDING  
FROM THE HUDSON BAY SOUTHWESTWARD INTO NORTHERN MEXICO, IS  
ANTICIPATED AT THE BEGINNING OF THE PERIOD (12Z FRIDAY). THIS UPPER  
TROUGH IS EXPECTED TO SHIFT EASTWARD DURING THE DAY AS SEVERAL  
SHORTWAVE TROUGHS ROTATE THROUGH IT. THIS EASTWARD SHIFT WILL RESULT  
IN A SOUTHWARD/SOUTHEASTWARD SURGE OF COLD, CONTINENTAL AIR INTO  
MORE OF THE FL PENINSULA. CONSEQUENTIAL FRONTAL SURGE COUPLED WITH  
LARGE-SCALE LIFT PROVIDED BY THE APPROACHING UPPER TROUGH WILL  
RESULT IN SHOWERS AND THUNDERSTORMS ACROSS CENTRAL AND SOUTHERN  
PORTIONS OF THE FL PENINSULA, PRIMARILY AFTER 00Z SATURDAY. STRONG  
UPPER FLOW WILL EXIST ACROSS THE REGION BUT LIMITED INSTABILITY  
SHOULD KEEP UPDRAFT STRENGTH LIMITED. ADDITIONALLY, FRONT-PARALLEL  
FLOW WILL LIKELY RESULT IN A GENERALLY ANAFRONTAL STORM CHARACTER.  
AS A RESULT, SEVERE PROBABILITIES ARE CURRENTLY BELOW 5%.  
 
..MOSIER.. 12/06/2017  
 

 
 
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