716  
FXUS01 KWBC 022214  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
513 PM EST TUE JAN 02 2018  
 
VALID 00Z WED JAN 03 2018 - 00Z FRI JAN 05 2018  
 
...A MAJOR EAST COAST WINTER STORM TO BRING HAZARDOUS WINTER  
TRAVEL CONDITIONS FROM THE SOUTHEAST TO NEW ENGLAND THROUGH  
FRIDAY, WITH THE WORST CONDITIONS EXPECTED ALONG THE IMMEDIATE  
EASTERN SEABOARD FROM THE CAROLINAS TO MAINE...  
 
...BITTERLY COLD TEMPERATURES AND DANGEROUS WIND CHILLS TO PERSIST  
EAST OF THE ROCKIES INTO THE WEEKEND, AS LAKE EFFECT SNOWFALL WILL  
CONTINUE 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.  
 
KEY MESSAGES:  
 
1. THIS WINTER STORM IS FORECAST TO BRING THE POTENTIAL FOR A MIX  
OF FREEZING RAIN/SLEET/SNOW FROM PORTIONS OF NORTHERN FLORIDA TO  
SOUTH CAROLINA, AND SNOWFALL NORTHWARD ALONG PORTIONS OF THE  
MID-ATLANTIC INTO NORTHERN NEW ENGLAND. BLIZZARD CONDITIONS ARE  
POSSIBLE ACROSS PORTIONS OF EASTERN NEW ENGLAND LATE THURSDAY.  
 
2. IF THIS WINTER STORM TRACKS CLOSER TO THE COAST, IT COULD MEAN  
MORE SNOW WHILE A TRACK FARTHER EAST COULD MEAN LESS SNOW.  
 
3. THIS SYSTEM HAS THE POTENTIAL TO PRODUCE STRONG, DAMAGING WINDS  
POSSIBLY RESULTING IN DOWNED TREES AND/OR POWER OUTAGES.  
 
4. MINOR TO MODERATE COASTAL FLOODING/EROSION IS POSSIBLE DUE TO A  
COMBINATION OF HIGH TIDES AND WAVE ACTION, ESPECIALLY THURSDAY  
AFTERNOON, JANUARY 4.  
 
5. WINTER STORM WATCHES AND WARNINGS ARE IN EFFECT FROM NORTH  
CENTRAL FLORIDA NORTHWARD THROUGH SOUTHEAST NEW ENGLAND.  
 
SANTORELLI/HURLEY  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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