809  
FXUS01 KWBC 042000  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
259 PM EST THU JAN 04 2018  
 
VALID 00Z FRI JAN 05 2018 - 00Z SUN JAN 07 2018  
 
...MAJOR NOR'EASTER PRODUCING BLIZZARD CONDITIONS AND COASTAL  
FLOODING IN PORTIONS OF EASTERN NEW ENGLAND...  
 
...HEAVY RAIN POSSIBLE OVER THE PACIFIC NORTHWEST AND NORTHERN  
CALIFORNIA COAST WITH POCKETS OF FREEZING RAIN POSSIBLE...  
   
..HEAVY SNOW DOWNWIND FROM THE GREAT LAKES
 
 
A VERY ROBUST WINTER STORM CONTINUES TO TRACK NORTHWARD JUST  
OFFSHORE THE EAST COAST BRINGING STRONG WINDS, HEAVY SNOW AND  
COASTAL FLOODING FROM THE MID-ATLANTIC TO THE NORTHEAST. SNOW WILL  
TAPER OFF TONIGHT ACROSS THE MID-ATLANTIC REGION WHILE PERSISTING  
THROUGH FRIDAY MORNING/EARLY AFTERNOON FOR NEW ENGLAND AS THE  
CENTRAL LOW PRESSURE WITH THIS SYSTEM REACHES THE CANADIAN  
MARITIMES. WIDESPREAD DISRUPTION TO TRAVEL, ESPECIALLY FOR THE  
NORTHEAST, MAY PERSIST INTO THE WEEKEND. WINTER STORM WARNINGS AND  
BLIZZARD WARNINGS SPAN FROM THE VIRGINIA OUTER BANKS TO MAINE. FOR  
DETAILED INFORMATION ON WINTER WEATHER REFER TO WPC'S HEAVY SNOW  
DISCUSSION (QPFHSD) AT  
WWW.WPC.NCEP.NOAA.GOV/DISCUSSIONS/HPCDISCUSSIONS.PHP?DISC=QPFHSD.  
 
AS THIS STORM LIFTS OUT OF THE REGION, COLD ARCTIC AIR WILL RETURN  
TO MUCH OF THE EASTERN CONUS AS HIGH PRESSURE MOVES SOUTHWARD FROM  
CENTRAL CANADA. WIND CHILL ADVISORIES AND WARNINGS ARE IN EFFECT  
FROM THE SOUTHERN MID-ATLANTIC NORTH TO THE UPPER GREAT LAKES AND  
EAST TO NEW ENGLAND. LAKE EFFECT SNOW WILL BE POSSIBLE THROUGH  
SATURDAY AS UPPER-LEVEL ENERGY PASSES OVER THE GREAT LAKES REGION  
WITHIN THIS COLD AIRMASS.  
 
WEAKENING UPPER-LEVEL ENERGY FOLLOWED BY A FRONT WILL MOVE INTO  
THE PACIFIC NORTHWEST THROUGH SATURDAY. RAIN WILL DEVELOP OVER  
PARTS OF THE PACIFIC NORTHWEST COAST INTO NORTHERN/CENTRAL  
CALIFORNIA WILL EXPAND INTO INTERIOR PARTS OF THE NORTHWEST  
THROUGH TONIGHT. SOME OF THE INTERIOR VALLEYS OF THE  
NORTHWEST/NORTHERN INTERMOUNTAIN REGION WILL DEVELOP AREAS OF  
RAIN/FREEZING RAIN ON THURSDAY EVENING AS WELL.  
 
KEY MESSAGES FOR EAST COAST WINTER STORM  
 
1) BLIZZARD TO NEAR BLIZZARD CONDITIONS WILL LIKELY PERSIST INTO  
THE EVENING HOURS FROM EASTERN MASSACHUSETTS TO MAINE. TRAVEL IN  
THESE AREAS WILL BE EXTREMELY DIFFICULT DUE TO POOR VISIBILITY AND  
ACCUMULATING/DRIFTING SNOW.  
 
2) MAJOR AND DESTRUCTIVE COASTAL FLOODING IS UNDERWAY IN SOME  
AREAS OF MASSACHUSETTS DUE TO A COMBINATION OF HIGH TIDES AND WAVE  
ACTION. HEED EVACUATION INFORMATION FROM LOCAL PUBLIC SAFETY  
OFFICIALS. COASTAL FLOODING IS ALSO POSSIBLE IN OTHER PARTS OF THE  
NORTHEAST.  
 
3) STRONG/DAMAGING WINDS WILL CONTRIBUTE TO DOWNED TREES AND POWER  
OUTAGES.  
 
4) WIND AND BLOWING SNOW WILL LIKELY PERSIST INTO FRIDAY,  
ESPECIALLY ACROSS MAINE.  
 
CAMPBELL  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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