004  
FXUS01 KWBC 030810  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
308 AM EST SUN DEC 03 2017  
 
VALID 12Z SUN DEC 03 2017 - 12Z TUE DEC 05 2017  
   
..HEAVY SNOW POSSIBLE FOR THE UPPER MISSISSIPPI VALLEY
 
 
   
..HEAVY SNOW POSSIBLE FOR PARTS OF THE NORTHERN/CENTRAL ROCKIES
 
 
   
..HEAVY RAIN POSSIBLE OVER PARTS OF THE UPPER GREAT LAKES
 
 
A DEVELOPING STRONG STORM OVER THE WEST COAST WILL MOVE EASTWARD  
TO THE UPPER GREAT LAKES BY MONDAY EVENING. THE SYSTEM WILL  
PRODUCE COASTAL/LOWER ELEVATION RAIN AND HIGHER ELEVATION SNOW  
OVER THE PACIFIC NORTHWEST AND PARTS OF NORTHERN CALIFORNIA INTO  
THE NORTHERN ROCKIES THAT WILL EXPAND EASTWARD INTO PARTS OF THE  
NORTHERN HIGH PLAINS/CENTRAL ROCKIES BY SUNDAY EVENING. OVERNIGHT  
SUNDAY, THE RAIN AND SNOW WILL END OVER THE PACIFIC NORTHWEST AND  
NORTHERN CALIFORNIA AS SNOW DEVELOPS OVER PARTS OF THE NORTHERN  
PLAINS.  
 
ON SUNDAY, MOISTURE FROM THE WESTERN GULF OF MEXICO WILL STREAM  
NORTHWARD OVER THE SOUTHERN PLAINS INTO THE UPPER/MIDDLE  
MISSISSIPPI VALLEY. AS THE STORM MOVES INTO THE MISSISSIPPI  
VALLEY, SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER PARTS OF THE  
UPPER/MIDDLE MISSISSIPPI VALLEY AND THE UPPER GREAT LAKES EARLY  
MONDAY MORNING THAT WILL EXPAND SOUTHWARD ALONG THE BOUNDARY INTO  
THE MIDDLE MISSISSIPPI VALLEY/SOUTHERN PLAINS ON MONDAY AFTERNOON  
INTO MONDAY EVENING. IN ADDITION, HEAVY SNOW WILL DEVELOP OVER  
PARTS OF NORTHERN PLAINS/UPPER MISSISSIPPI VALLEY ON MONDAY INTO  
MONDAY EVENING. ALSO ON MONDAY, THE SHOWERS AND THUNDERSTORMS  
WILL MOVE INTO PARTS OF THE GREAT LAKES. THE SNOW WILL END OVER  
THE NORTHERN/CENTRAL ROCKIES BY MONDAY EVENING.  
 
MEANWHILE, UPPER-LEVEL ENERGY OVER THE MID-ATLANTIC WILL AID IN  
PRODUCING LIGHT RAIN OVER PARTS OF THE SOUTHERN MID-ATLANTIC AND  
SOUTHEAST COAST ON SUNDAY MORNING ENDING BY SUNDAY AFTERNOON.  
ADDITIONALLY, AS THE MOISTURE MOVES OVER THE SOUTHERN PLAINS,  
UPPER-LEVEL ENERGY OVER NORTHERN MEXICO WILL MOVE EASTWARD TO THE  
SOUTHEAST COAST BY MONDAY EVENING. THE ENERGY WILL AID IN  
PRODUCING SHOWERS AND THUNDERSTORMS OVER WESTERN GULF COAST THAT  
WILL EXPAND NORTHWARD INTO THE SOUTHERN PLAINS ON SUNDAY THAT WILL  
EXPAND INTO THE LOWER MISSISSIPPI VALLEY BY MONDAY EVENING.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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