595  
FXUS01 KWBC 262001  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
300 PM EST MON NOV 26 2018  
 
VALID 00Z TUE NOV 27 2018 - 00Z THU NOV 29 2018  
 
...HEAVY SNOWFALL IMPACTS PARTS OF NEW ENGLAND THROUGH TUESDAY,  
WITH ADDITIONAL SNOWFALL EXPECTED DOWNWIND OF THE GREAT LAKES...  
 
...HEAVY PRECIPITATION CONTINUES THROUGH THE SHORT RANGE PERIOD  
FOR THE PACIFIC NORTHWEST AND NORTHERN CALIFORNIA...  
 
...WELL BELOW NORMAL TEMPERATURES LIKELY ACROSS PARTS OF THE  
MIDWEST...  
 
THE SYSTEM THAT DROPPED OVER A FOOT OF SNOW ACROSS PARTS OF THE  
MISSISSIPPI VALLEY AND THE UPPER GREAT LAKES THIS PAST WEEKEND HAS  
COME TO AN END ACROSS THAT REGION WITH MAINLY ONLY LIGHT SNOWS  
REMAINING ACROSS PARTS OF THE OHIO VALLEY. HEAVY SNOWFALL HOWEVER  
WILL BEGIN IMPACTING PARTS OF NEW ENGLAND BY TONIGHT AS A NEW  
SURFACE LOW DEVELOPS ALONG THE NORTHEAST COASTLINE. ACCUMULATIONS  
OF 6 TO 12+ INCHES ARE POSSIBLE FROM UPPER NEW YORK STATE TO  
NORTHERN MAINE WHERE WINTER STORM WARNINGS AND WINTER WEATHER  
ADVISORIES ARE IN EFFECT. THE BACKSIDE OF THIS SYSTEM WILL FEATURE  
A LAKE EFFECT SNOW EVENT, AS COLD AIR MOVES OVER THE STILL  
RELATIVELY WARM LAKE SURFACES. SIGNIFICANT ACCUMULATIONS OF 10+  
INCHES MAY BE POSSIBLE IN THE MOST PERSISTENT BANDS, ESPECIALLY  
FOR LOCATIONS DOWNWIND OF LAKES ERIE AND ONTARIO. THIS IS EXPECTED  
TO PERSIST THROUGH THE MIDDLE OF THE WEEK. ACROSS BOTH REGIONS -  
NEW ENGLAND AND THE GREAT LAKES - GUSTY WINDS COMBINED WITH HEAVY  
SNOWFALL WILL RESULT IN HAZARDOUS TRAVEL CONDITIONS.  
 
THE NEXT ROUND OF HEAVY PRECIPITATION HAS PUSHED INTO THE PACIFIC  
NORTHWEST TODAY, EVENTUALLY EXTENDING SOUTHWARD INTO NORTHERN  
CALIFORNIA BY TUESDAY AND WEDNESDAY. HEAVY TO EXCESSIVE RAINFALL  
IS POSSIBLE, AND WPC HAS HIGHLIGHTED PARTS OF THE REGION WITHIN A  
MARGINAL RISK FOR FLASH FLOODING. ACCUMULATING SNOW AND ICE ARE  
POSSIBLE FOR PORTIONS OF THE WASHINGTON CASCADES WHERE WINTER  
WEATHER ADVISORIES ARE IN PLACE, WITH MOUNTAIN SNOWS ALSO POSSIBLE  
INTO THE INTERMOUNTAIN WEST. ENERGY FROM THIS SYSTEM PUSHES INTO  
THE NORTHERN PLAINS BY WEDNESDAY WHERE SOME LIGHT SNOW OR FREEZING  
RAIN IS POSSIBLE.  
 
REGARDING TEMPERATURES ACROSS THE COUNTRY, A STRONG FRONT BANKED  
UP AGAINST THE CONTINENTAL DIVIDE SEPARATES BELOW TO WELL BELOW  
NORMAL TEMPERATURES ACROSS THE CENTRAL AND EASTERN STATES, AND  
ABOVE NORMAL TEMPS IN THE WEST. MUCH OF THE WEST WILL REMAIN NEAR  
OR ABOVE AVERAGE THROUGH THE SHORT RANGE, WITH THE WARMEST  
TEMPERATURES EXPECTED ACROSS THE HIGH PLAINS WHERE AFTERNOON HIGHS  
COULD BE 10 TO 20 DEGREES ABOVE NORMAL BY WEDNESDAY. MEANWHILE TO  
THE EAST OF THE FRONT, SURFACE HIGH PRESSURE PREVAILS RESULTING IN  
BELOW TO WELL BELOW NORMAL VALUES THROUGH MID-WEEK. PLACES FROM  
THE CENTRAL PLAINS TO THE CENTRAL APPALACHIANS COULD BE 20 TO 30  
DEGREES BELOW AVERAGE FOR THIS TIME OF THE YEAR.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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