060  
ACUS02 KWNS 011723  
SWODY2  
SPC AC 011722  
 
DAY 2 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK  
1122 AM CST FRI DEC 01 2017  
 
VALID 021200Z - 031200Z  
   
..NO SEVERE THUNDERSTORM AREAS FORECAST
 
 
   
..SUMMARY
 
 
ISOLATED THUNDERSTORMS ARE POSSIBLE ACROSS THE COASTAL PACIFIC  
NORTHWEST SATURDAY.  
   
..SYNOPSIS
 
 
MODEST AMPLIFICATION OF THE UPPER FLOW FIELD ACROSS THE U.S. WILL  
OCCUR SATURDAY, AS A TROUGH INITIALLY OFF THE WEST COAST DIGS  
SOUTHEASTWARD/ONSHORE. IN RESPONSE, A WEAK INCREASE IN RIDGING OVER  
THE CENTRAL U.S. WILL OCCUR, IN THE WAKE OF SHORT-WAVE TROUGHING  
CROSSING THE EASTERN U.S./WESTERN ATLANTIC.  
 
AT THE SURFACE, HIGH PRESSURE WILL LARGELY PREVAIL ACROSS THE  
COUNTRY, THOUGH A COLD FRONT WILL SHIFT ACROSS THE NORTHWESTERN  
STATES WITH TIME IN CONJUNCTION WITH THE ONSHORE ADVANCE OF THE  
UPPER SYSTEM.  
 
WITH COLD AIR ALOFT OVERSPREADING THE PACIFIC NORTHWEST AREA,  
SHOWERS -- AND A FEW/OCCASIONAL/EMBEDDED MAINLY POST-FRONTAL  
THUNDERSTORMS MAY ALSO OCCUR, PARTICULARLY OVER THE COASTAL RANGES.  
ELSEWHERE, APPRECIABLE RISK FOR LIGHTNING IS NOT INDICATED ACROSS  
THE REMAINDER OF THE COUNTRY.  
 
..GOSS.. 12/01/2017  
 

 
 
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