614  
FXUS01 KWBC 061926  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
326 PM EDT SAT OCT 06 2018  
 
VALID 00Z SUN OCT 07 2018 - 00Z TUE OCT 09 2018  
 
...THE MULTI DAY HEAVY RAIN/FLASH FLOODING EVENT WILL CONTINUE  
ACROSS THE SOUTHERN TO CENTRAL PLAINS INTO THE MID TO UPPER  
MISSISSIPPI VALLEY REGION...  
 
...A STRONG FRONT STRETCHING FROM THE SOUTHERN PLAINS INTO THE  
LOWER LAKES REGION WILL SEPARATE MUCH BELOW NORMAL TEMPERATURES  
ACROSS THE NORTHERN ROCKIES...NORTHERN TO CENTRAL PLAINS FROM MUCH  
ABOVE AVERAGE TEMPERATURES FROM THE MISSISSIPPI VALLEY INTO THE  
OHIO VALLEY AND NORTHEAST..  
 
...EARLY SEASON HEAVY SNOW POSSIBLE ACROSS THE WASATCH INTO THE  
CENTRAL TO NORTHERN ROCKIES AND PORTIONS OF THE NORTHERN HIGH  
PLAINS...  
 
THE MULTI-DAY HEAVY RAIN AND POSSIBLE FLASH FLOODING EVENT WILL  
CONTINUE ACROSS PORTIONS OF THE SOUTHERN TO CENTRAL PLAINS...INTO  
THE MID TO UPPER MISSISSIPPI VALLEY REGION. THIS EVENT WILL BE IN  
THE VICINITY OF A STRONG FRONTAL BOUNDARY THAT WILL REMAIN NEARLY  
STATIONARY FOR MOST OF THIS PERIOD FROM THE SOUTHERN  
PLAINS...NORTHEAST INTO THE MID MISSISSIPPI VALLEY AND INTO THE  
LOWER GREAT LAKES. MUCH ABOVE AVERAGE MOISTURE VALUES IN THE  
VICINITY OF THIS FRONT...COMBINED WITH VERY FAVORABLE RIGHT  
ENTRANCE REGION JET DYNAMICS ALOFT...WILL SUPPORT THE LIKELIHOOD  
OF ROUNDS OF POTENTIALLY HEAVY TO EXCESSIVE PRECIPITATION AMOUNTS  
MOVING ALONG THE FRONTAL BOUNDARY.  
 
THIS FRONTAL BOUNDARY WILL BE THE DIVIDING LINE BETWEEN MUCH BELOW  
AVERAGE TEMPERATURES THAT WILL PERSIST SATURDAY-SUNDAY AND MONDAY  
OVER THE CENTRAL TO NORTHERN PLAINS AND CENTRAL TO NORTHERN  
ROCKIES REGION...AND MUCH ABOVE AVERAGE TEMPERATURES FROM THE MID  
MISSISSIPPI VALLEY...OHIO VALLEY AND INTO PORTIONS OF THE  
NORTHEAST AND MID-ATLANTIC.  
 
THE AMPLIFYING MID TO UPPER LEVEL TROF OVER THE GREAT BASIN AND  
SOUTHWEST...WILL SUPPORT EARLY SEASON HEAVY SNOWS FROM THE WASATCH  
OF UTAH INTO THE CENTRAL TO NORTHERN ROCKIES. ACCUMULATING SNOWS  
MAY PUSH EASTWARD INTO THE NORTHERN HIGH PLAINS SUNDAY FROM  
NORTHEAST WYOMING INTO WESTERN SOUTH DAKOTA.  
 
ORAVEC  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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