209  
FXUS01 KWBC 170749  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
248 AM EST WED JAN 17 2018  
 
VALID 12Z WED JAN 17 2018 - 12Z FRI JAN 19 2018  
 
...LIGHT TO MODERATE SNOW ACCUMULATIONS FOR PORTIONS OF THE  
MID-ATLANTIC REGION AND NORTHERN NEW ENGLAND TODAY...  
 
...BELOW AVERAGE TEMPERATURES FROM THE NORTHERN MID-ATLANTIC INTO  
THE SOUTH...  
 
...SIGNIFICANT WARM-UP FROM THE NORTH-CENTRAL U.S. INTO THE  
CENTRAL PLAINS...  
   
..A RETURN TO WET/WHITE ACROSS THE WESTERN U.S
 
 
A STRONG COLD FRONT MOVING EAST INTO THE MID-ATLANTIC AND  
SOUTHEAST EARLY THIS MORNING WILL HELP SET THE STAGE FOR  
ACCUMULATING SNOW ACROSS SOUTH-CENTRAL VIRGINIA INTO CENTRAL NORTH  
CAROLINA, EXTENDING ALL THE WAY TO THE COAST. RAIN WILL LIKELY BE  
THE INITIAL PRECIPITATION TYPE ALONG THE EASTERN EDGES OF THE  
PRECIPITATION SHIELD, BUT A TRANSITION TO ALL SNOW IS EXPECTED  
DURING THE DAY TODAY AND TONIGHT ACROSS COASTAL NORTH CAROLINA.  
TWO TO FOUR INCHES OF SNOW, LOCALLY HIGHER, IS EXPECTED FOR INLAND  
LOCATIONS WHILE ONE TO TWO INCHES WILL BE POSSIBLE ALONG COASTAL  
LOCATIONS ENDING THURSDAY MORNING.  
 
TO THE NORTH, COASTAL RAIN FOR THE NORTHEAST WITH INLAND SNOW WILL  
FALL FOR MUCH OF THE DAY TODAY WITH THE GREATEST POTENTIAL FOR  
FOUR OR MORE INCHES OF SNOW EXTENDING FROM CENTRAL MASSACHUSETTS  
INTO EASTERN MAINE BEFORE SNOW ENDS WITH THE DEPARTING SURFACE LOW  
TONIGHT.  
 
AS HIGH PRESSURE, CURRENTLY OVER THE SOUTH, MOVES EAST OVER THE  
NEXT ONE TO TWO DAYS, WESTERLY TO SOUTHWESTERLY FLOW WILL DEVELOP  
ACROSS THE MIDDLE OF THE NATION ALLOWING FOR A SIGNIFICANT  
WARM-UP. HIGH TEMPERATURES WILL RISE INTO THE 30S AND EVEN LOWER  
40S FOR THE DAKOTAS TODAY AND THURSDAY. IN FACT, FOR THURSDAY,  
HIGH TEMPERATURES ARE FORECAST TO BE A GOOD 10 TO 25 DEGREES ABOVE  
AVERAGE ACROSS A SIZABLE PORTION OF THE NATION EXTENDING FROM THE  
CENTRAL/NORTHERN PLAINS INTO THE WESTERN U.S.  
 
ACROSS THE WESTERN U.S., A RETURN TO A WET PATTERN IS EXPECTED TO  
CLOSE OUT THE WEEK ALONG THE COAST WITH INLAND SNOW. LIGHT RAIN  
AHEAD OF A WARM FRONT WILL MOVE INTO COASTAL OREGON AND WASHINGTON  
EARLY TODAY, FOLLOWED BY HEAVIER RAIN TONIGHT TIED TO THE SYSTEM'S  
COLD FRONT. RAIN WILL TRANSITION TO SNOW BEHIND THE COLD FRONT FOR  
THE HIGHER TERRAIN WITH THE HEAVIEST ACCUMULATIONS IN THE NORTHERN  
WASHINGTON CASCADES THROUGH THURSDAY MORNING.  
 
OTTO  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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