962  
FXUS01 KWBC 240801  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
300 AM EST SUN DEC 24 2017  
 
VALID 12Z SUN DEC 24 2017 - 12Z TUE DEC 26 2017  
 
...HEAVY SNOW POSSIBLE OVER PARTS OF THE NORTHEAST AND THE UPPER  
GREAT LAKES...  
 
...SNOW POSSIBLE FOR PART OF THE CASCADES AND THE NORTHERN/CENTRAL  
ROCKIES...  
 
...SNOW, RAIN, AND FREEZING RAIN MIXED OVER PARTS OF THE  
NORTHEAST...  
 
RAIN IS EXPECTED TODAY FOR MUCH OF THE COASTAL SOUTHEAST AND  
MID-ATLANTIC AS AN AREA OF LOW PRESSURE DEVELOPS ALONG THE COLD  
FRONT MOVING OFFSHORE OVER THE ATLANTIC OCEAN. MUCH OF THE OHIO  
VALLEY, UPPER MIDWEST, GREAT LAKES AND THE NORTHEAST WILL HAVE  
SNOW AS POST FRONTAL COLD AIR SURGES IN AND A CLIPPER SYSTEM  
ADVANCES THROUGH THE NORTHERN-TIER STATES. SNOW WILL SPREAD FROM  
THE NORTHERN/CENTRAL ROCKIES ACROSS THE HIGH PLAINS AND THROUGH  
THE GREAT LAKES AND NORTHEAST. A FEW LOCATIONS WILL BE IN THE  
TRANSITION ZONE AT THE JUNCTURE OF THE TWO AIR MASSES, RESULTING  
IN MIXED PRECIPITATION- THIS WILL LIKELY OCCUR OVER A SECTION OF  
THE EASTERN OHIO VALLEY/CENTRAL APPALACHIANS, HOWEVER, IT IS  
EXPECTED TO CHANGE OVER TO SNOW BY EARLY CHRISTMAS MORNING. SNOW  
WILL BE HEAVY AT TIMES, ESPECIALLY FOR THE FAVORED AREAS DOWNWIND  
OF THE LAKES AND FOR UPSLOPE AREAS OF UPSTATE NEW YORK TO WESTERN  
MAINE. SNOW COVERED ROADS ACROSS THIS REGION MAY BE LEAD TO  
HAZARDOUS CONDITIONS - TRAVELERS ARE URGED TO ALLOW EXTRA TIME TO  
ARRIVE SAFELY.  
 
RAIN AND HIGHER ELEVATION SNOW WILL SPREAD FROM THE PACIFIC  
NORTHWEST COAST TO THE NORTHERN FRINGE OF THE GREAT BASIN AND THE  
NORTHERN/CENTRAL ROCKIES AS A LOW PRESSURE SYSTEM MOVES ONSHORE  
FROM THE PACIFIC OCEAN. ALTHOUGH THE SYSTEM IS FORECAST TO  
DISSIPATE BY CHRISTMAS AFTERNOON, PRECIPITATION WILL CONTINUE INTO  
TUESDAY. SNOW WILL BE HEAVY AT TIMES FOR THE CASCADES, NORTHERN  
ROCKIES AND CENTRAL ROCKIES.  
 
 
CAMPBELL  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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