907  
ACUS02 KWNS 050539  
SWODY2  
SPC AC 050538  
 
DAY 2 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK  
1138 PM CST MON DEC 04 2017  
 
VALID 061200Z - 071200Z  
   
..NO THUNDERSTORM AREAS FORECAST
 
 
   
..SUMMARY
 
 
THUNDERSTORMS ARE NOT EXPECTED ACROSS THE CONTIGUOUS UNITED STATES  
WEDNESDAY.  
   
..SYNOPSIS
 
 
HIGHLY AMPLIFIED UPPER PATTERN IS EXPECTED ACROSS NORTH AMERICA AT  
THE BEGINNING OF THE PERIOD WITH AN EXPANSIVE AND DEEP UPPER TROUGH  
COVERING THE CENTRAL AND EASTERN PORTIONS OF THE CONUS. THIS UPPER  
TROUGH WILL DEEPEN THROUGHOUT THE PERIOD AS A SHORTWAVE TROUGH MOVES  
THROUGH ITS WESTERN PERIPHERY. AT THE SAME TIME, UPPER RIDGING ALONG  
THE WEST COAST WILL BUILD.  
 
THE SURFACE PATTERN WILL BE DOMINATED BY HIGH PRESSURE EXTENDING  
FROM THE PACIFIC NORTHWEST TO THE SOUTHERN PLAINS/LOWER MS VALLEY.  
DRY, CONTINENTAL AIRMASS ASSOCIATED WITH THIS HIGH PRESSURE WILL  
RESULT IN STABLE CONDITIONS ACROSS THE MAJORITY OF THE CONUS. A  
COLD FRONT WILL BE MOVING THROUGH NORTHERN FL AT THE BEGINNING OF  
THE PERIOD, WITH SOME SLOW SOUTHWARD PROGRESS POSSIBLE THROUGHOUT  
THE DAY. MODEST BUOYANCY WILL RESULT IN SOME DEEPER CONVECTION ALONG  
THE FRONT ACROSS NORTHERN FL BUT WARM TEMPERATURES ALOFT AND  
RESULTING LIMITED INSTABILITY SHOULD KEEP UPDRAFTS TOO SHALLOW/WEAK  
FOR LIGHTNING PRODUCTION.  
 
..MOSIER.. 12/05/2017  
 

 
 
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