019  
FXUS01 KWBC 201959  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
258 PM EST WED DEC 20 2017  
 
VALID 00Z THU DEC 21 2017 - 00Z SAT DEC 23 2017  
   
..HEAVY SNOW OVER PARTS OF THE CENTRAL ROCKIES
 
 
...SNOW POSSIBLE FROM PARTS OF THE NORTHERN PLAINS ACROSS THE  
GREAT LAKES INTO THE NORTHEAST...  
 
...HEAVY RAIN POSSIBLE OVER PARTS OF THE LOWER MISSISSIPPI  
VALLEY/TENNESSEE VALLEY...  
 
STRONG STORM OVER GREAT BASIN/CENTRAL PLAINS WILL LIFT  
NORTHEASTWARD TO THE OHIO VALLEY BY FRIDAY. THE SYSTEM WILL  
PRODUCE COASTAL RAIN AND HIGHER ELEVATION SNOW OVER PARTS OF THE  
PACIFIC NORTHWEST WITH SNOW OVER PARTS OF THE NORTHERN  
INTERMOUNTAIN REGION/NORTHERN ROCKIES AND THE GREAT BASIN. THE  
RAIN AND SNOW WILL COME TO AN END OVER THE PACIFIC  
NORTHWEST/NORTHERN INTERMOUNTAIN REGION OVERNIGHT WEDNESDAY. IN  
ADDITION, SNOW OVER THE NORTHERN PLAINS WILL SPREAD INTO THE UPPER  
GREAT LAKES ALSO OVERNIGHT WEDNESDAY AS SNOW MOVES INTO THE  
CENTRAL ROCKIES ENDING OVERNIGHT THURSDAY. ON THURSDAY, SNOW AND  
SOME RAIN WILL DEVELOP OVER PARTS OF THE NORTHERN/CENTRAL PLAINS  
INTO THE UPPER GREAT LAKES.  
 
MORE TO FOLLOW  
 
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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