897  
FXUS01 KWBC 201909  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
209 PM EST SUN JAN 20 2019  
 
VALID 00Z MON JAN 21 2019 - 00Z WED JAN 23 2019  
   
..MAJOR WINTER STORM WILL BEGIN TO WIND DOWN OVER THE NORTHEAST
 
 
...HEAVY SNOW POSSIBLE OVER PARTS OF NORTHERN MAINE, SIERRAS,  
GREAT BASIN, AND NORTHERN/CENTRAL ROCKIES...  
 
...TEMPERATURES WILL BE 10 TO 20 DEGREES BELOW AVERAGE OVER PARTS  
OF THE GREAT LAKES, OHIO VALLEY, AND INTO PARTS OF THE  
NORTHEAST/MID-ATLANTIC...  
 
A MAJOR WINTER STORM WILL SLOWLY WIND DOWN AS THE STORM OVER THE  
GULF OF MAINE MOVES NORTHEASTWARD INTO THE CANADIAN MARITIMES BY  
MONDAY MORNING. THE HEAVY SNOW OVER NORTHERN MAINE WILL END  
OVERNIGHT SUNDAY. IN THE WAKE OF THE STORM, LAKE EFFECT SNOW WILL  
DEVELOP DOWNWIND FROM THE GREAT LAKES AND UPSLOPE FLOW WILL AID IN  
DEVELOPING SNOW OVER PARTS OF THE CENTRAL APPALACHIANS THROUGH  
MONDAY EVENING. THE LAKE EFFECT SNOW WILL END, WEST TO EAST,  
MONDAY INTO MONDAY EVENING.  
 
MEANWHILE, A STORM MOVING ONSHORE OVER THE WEST COAST WILL MOVE  
EASTWARD TO THE CENTRAL PLAINS BY TUESDAY. THE SYSTEM WILL  
PRODUCE RAIN AND HIGHER ELEVATION SNOW OVER PARTS OF THE PACIFIC  
NORTHWEST/NORTHERN CALIFORNIA AND SNOW OVER PARTS OF THE NORTHERN  
ROCKIES. OVERNIGHT SUNDAY, SNOW WILL MOVE INTO THE SIERRAS AND  
PARTS OF THE GREAT BASIN AS SNOW DEVELOPS OVER PARTS OF THE  
NORTHERN PLAINS. SNOW WILL DEVELOP OVER PARTS OF THE CENTRAL  
ROCKIES ON MONDAY. THE RAIN AND SNOW WILL END OVER  
CALIFORNIA/NEVADA AND THE PACIFIC NORTHWEST BY MONDAY NIGHT. THE  
SNOW OVER THE NORTHERN PLAINS WILL EXPAND INTO PARTS OF THE UPPER  
MISSISSIPPI VALLEY BY MONDAY EVENING, TOO. SNOW WILL ALSO MOVE  
INTO PARTS OF THE UPPER GREAT LAKES OVERNIGHT MONDAY. ON TUESDAY,  
RAIN WILL DEVELOP OVER PARTS OF THE LOWER/MIDDLE MISSISSIPPI  
VALLEY AND PARTS OF THE CENTRAL/SOUTHERN PLAINS. IN ADDITION,  
ONSHORE FLOW WILL DEVELOP OVER THE PACIFIC NORTHWEST LATE MONDAY  
NIGHT INTO TUESDAY. THE MOISTURE WILL AID IN PRODUCING RAIN AND  
HIGHER ELEVATION SNOW OVER PARTS OF THE PACIFIC NORTHWEST EARLY  
TUESDAY MORNING INTO TUESDAY.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  
 

 
 
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