048  
FXUS01 KWBC 121956  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
255 PM EST FRI JAN 12 2018  
 
VALID 00Z SAT JAN 13 2018 - 00Z MON JAN 15 2018  
   
..HEAVY SNOW POSSIBLE FROM THE OHIO VALLEY INTO THE NORTHEAST
 
 
...RAIN/FREEZING RAIN/SLEET POSSIBLE CENTRAL APPALACHIANS TO THE  
NORTHEAST...  
   
..HEAVY RAIN POSSIBLE ALONG NEW ENGLAND COAST
 
 
A STRONG FRONT OVER THE EASTERN PORTION OF THE COUNTRY WILL MOVE  
EASTWARD OFF THE EASTERN SEABOARD BY SATURDAY AFTERNOON. THE  
SYSTEM WILL PRODUCE RAIN WITH POSSIBLE EMBEDDED THUNDERSTORMS OVER  
THE SOUTHERN MID-ATLANTIC/SOUTHEAST COAST THROUGH EARLY SATURDAY  
MORNING. RAIN WILL ALSO DEVELOP OVER PARTS OF THE NORTHEAST TO  
THE CENTRAL/SOUTHERN APPALACHIANS THAT WILL END SOUTH TO NORTH  
ALONG THE EAST COAST BY SATURDAY EVENING. THE SYSTEM WILL ALSO  
PRODUCE SNOW FROM PARTS OF THE TENNESSEE VALLEY INTO THE LOWER  
GREAT LAKES THAT WILL MOVE INTO THE CENTRAL APPALACHIANS INTO THE  
NORTHEAST BY SATURDAY MORNING. THE SNOW WILL BE HEAVY AT TIMES.  
THE SNOW WILL START TO WIND DOWN ON SATURDAY AFTERNOON FROM THE  
CENTRAL APPALACHIANS INTO THE NORTHERN MID-ATLANTIC AND ENDING  
OVER THE NORTHEAST BY SATURDAY EVENING. IN ADDITION, ALONG THE  
RAIN/SNOW LINE, A BAND OF RAIN/FREEZING RAIN/SLEET WILL DEVELOP  
FROM THE CENTRAL APPALACHIANS INTO THE NORTHEAST, AGAIN SOUTH TO  
NORTH, THROUGH LATE AFTERNOON ON SATURDAY. IN THE WAKE OF THE  
STORM, LIGHT LAKE EFFECT SNOW WILL DEVELOP DOWNWIND FROM GREAT  
LAKES WINDING DOWN BY SUNDAY MORNING.  
 
MEANWHILE, ONSHORE FLOW WILL STREAM MOISTURE INTO THE NORTHWEST  
THROUGH SATURDAY EVENING. ADDITIONALLY, A FRONT EXTENDING ALONG  
THE EAST SIDE OF THE ROCKIES AND COLD HIGH PRESSURE BUILDING INTO  
THE PLAINS WILL AID IN PRODUCING SNOW OVER PARTS OF THE  
NORTHERN/CENTRAL ROCKIES INTO PARTS OF THE CENTRAL PLAINS THROUGH  
FRIDAY EVENING. A WAVE OF LOW PRESSURE OVER THE NORTHERN ROCKIES,  
ON SATURDAY MORNING, WILL MOVE SOUTHEASTWARD TO THE CENTRAL HIGH  
PLAINS BY SUNDAY MORNING. SNOW WILL DEVELOP OVER THE NORTHERN  
ROCKIES ON SATURDAY WILL MOVE SOUTHEASTWARD INTO THE  
CENTRAL/NORTHERN PLAINS OVERNIGHT SATURDAY INTO SUNDAY.  
 
MORE TO FOLLOW  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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