617  
ACUS48 KWNS 070920  
SWOD48  
SPC AC 070919  
 
DAY 4-8 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK  
0319 AM CST SAT DEC 07 2019  
 
VALID 101200Z - 151200Z  
   
..DISCUSSION
 
 
DEEP UPPER TROUGH IS EXPECTED TO COVER MUCH OF THE CENTRAL AND  
EASTERN CONUS AT THE BEGINNING OF THE PERIOD (I.E. 12Z D4/TUESDAY).  
MEDIUM-RANGE GUIDANCE IS IN GOOD AGREEMENT THAT THIS TROUGH WILL  
GRADUALLY SHIFT EASTWARD ON D4/TUESDAY AND D5/WEDNESDAY WHILE SLOWLY  
LOSING AMPLITUDE. A COLD FRONT IS EXPECTED TO MOVE ACROSS THE  
EASTERN CONUS ON D4/TUESDAY, WITH A COOL AND STABLE AIR MASS  
ANTICIPATED IN ITS WAKE ON D5/WEDNESDAY AND MUCH OF D6/THURSDAY.  
ANOTHER SOUTHERN-STREAM SHORTWAVE TROUGH MAY MOVE ACROSS THE  
SOUTHERN PLAINS AND INTO THE SOUTHEAST ON D7/FRIDAY AND THE  
MID-ATLANTIC ON D8/SATURDAY.  
 
ISOLATED THUNDERSTORMS ARE POSSIBLE AHEAD OF THE FRONT ON D4/TUESDAY  
BUT THE OVERALL SEVERE POTENTIAL IS LOW. THUNDERSTORMS MAY ALSO  
OCCUR AHEAD OF THE SOUTHERN-STREAM SYSTEM LATE IN THE WEEK, BUT  
RUN-TO-RUN AND MODEL-TO-MODEL VARIABILITY LIMITS FORECAST  
CONFIDENCE.  
 
..MOSIER.. 12/07/2019  
 
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