177  
FXUS01 KWBC 021945  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
244 PM EST TUE JAN 02 2018  
 
VALID 00Z WED JAN 03 2018 - 00Z FRI JAN 05 2018  
 
...WELL BELOW NORMAL TEMPERATURES TO PERSIST EAST OF THE ROCKIES  
AS A POTENTIALLY SIGNIFICANT WINTER STORM DEVELOPS OFF THE EAST  
COAST...  
 
...LAKE EFFECT SNOWFALL TO CONTINUE THIS WEEK DOWNWIND OF THE  
GREAT LAKES...  
 
REINFORCING SHOTS OF ARCTIC AIR WILL CONTINUE ACROSS MUCH OF THE  
EASTERN HALF OF THE COUNTRY THROUGH THIS WEEK KEEPING AFTERNOON  
HIGHS AS MUCH AS 10 TO 20 DEGREES BELOW NORMAL. MEANWHILE, AN AREA  
OF LOW PRESSURE DEVELOPING OVER THE BAHAMAS BY TOMORROW MORNING  
WILL RAPIDLY DEEPEN AS IT MOVES NORTHWARD OFF THE EAST COAST  
WEDNESDAY AND THURSDAY. GIVEN THE COLD AIR LOCKED IN PLACE, THIS  
WILL ALLOW FOR POTENTIALLY SIGNIFICANT WINTRY PRECIPITATION TO  
SPREAD ALONG THE EAST COAST FROM THE FLORIDA PANHANDLE TO MAINE.  
AS MUCH AS A QUARTER OF AN INCH OF ICE AND A COUPLE INCHES OF  
SNOW, WITH LOCALLY HIGHER AMOUNTS, ARE POSSIBLE FROM PORTIONS OF  
THE FLORIDA PANHANDLE TO EASTERN NORTH CAROLINA TONIGHT AND INTO  
TOMORROW. BY WEDNESDAY, HEAVY SNOWFALL WILL BEGIN TO DEVELOP ALONG  
THE MID-ATLANTIC COAST AND INTO THE NORTHEAST, MAINLY ALONG AND  
EAST OF THE I-95 CORRIDOR. THE HIGHEST SNOWFALL ACCUMULATION IS  
EXPECTED ACROSS EASTERN NEW ENGLAND WHERE UPWARDS OF 6 INCHES IS  
POSSIBLE. IN ADDITION TO WINTRY PRECIPITATION, HIGH WINDS AND  
DANGEROUS WIND CHILLS ARE EXPECTED BY THURSDAY ACROSS MUCH OF THE  
NORTHEAST AS THE ATLANTIC SURFACE LOW RAPIDLY STRENGTHENS OFF THE  
COAST.  
 
ELSEWHERE, PERSISTENT WESTERLY FLOW WILL ALLOW FOR LAKE EFFECT  
SNOWS TO CONTINUE DOWNWIND OF THE GREAT LAKES. GENERALLY LIGHT TO  
MODERATE ACCUMULATIONS ARE EXPECTED. OUT WEST, RAIN WILL MOVE INTO  
CALIFORNIA AND THE PACIFIC NORTHWEST BY WEDNESDAY EVENING AS AN  
UPPER LEVEL SYSTEM OVER THE EASTERN PACIFIC APPROACHES THE REGION.  
ABOVE NORMAL TEMPERATURES ARE ALSO EXPECTED TO CONTINUE ACROSS  
MUCH OF THE WESTERN STATES.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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