926  
FXUS01 KWBC 090756  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
255 AM EST WED JAN 09 2019  
 
VALID 12Z WED JAN 09 2019 - 12Z FRI JAN 11 2019  
 
...ACCUMULATING SNOWS CONTINUE TODAY ACROSS THE GREAT LAKES INTO  
INTERIOR NEW ENGLAND...  
 
...LOWER ELEVATION RAIN AND MOUNTAIN SNOW ON WEDNESDAY FOR  
NORTHERN CALIFORNIA AND THE PACIFIC NORTHWEST...  
 
...MOISTURE BEGINS TO INCREASE BY FRIDAY AHEAD OF A DEVELOPING LOW  
PRESSURE SYSTEM IN THE SOUTHERN PLAINS...  
 
SNOW ACROSS INTERIOR PORTIONS OF THE NORTHEAST WILL CONTINUE  
THROUGH TODAY AS A SURFACE LOW INTENSIFIES AND MOVES UP THE NEW  
ENGLAND COAST AND INTO THE CANADIAN MARITIMES BY THURSDAY. AS MUCH  
AS 6+ INCHES OF ADDITIONAL SNOWFALL IS STILL POSSIBLE ACROSS PARTS  
OF THE LOWER GREAT LAKES INTO NORTHERN NEW ENGLAND WHERE WINTER  
STORM WARNINGS AND WINTER WEATHER ADVISORIES REMAIN IN EFFECT.  
NORTH TO WESTERLY WINDS ON THE BACKSIDE OF THIS STORM IS LIKELY TO  
ALLOW FOR LIGHT LAKE EFFECT SNOWS INTO THURSDAY AS WELL DOWNWIND  
OF THE UPPER AND LOWER LAKES. THIS SYSTEM WILL USHER IN A MUCH  
COOLER AIR MASS INTO MUCH OF THE EASTERN U.S. AS THE STORM MOVES  
AWAY AND SURFACE HIGH PRESSURE BUILDS INTO THE REGION.  
 
MEANWHILE, LOW PRESSURE IN THE NORTHEAST PACIFIC WITH A WEAKENING  
FRONTAL BOUNDARY MOVING INTO THE WEST COAST WILL CONTINUE TO BRING  
PRECIPITATION FROM THE PACIFIC NORTHWEST INTO CALIFORNIA ON  
WEDNESDAY. RAIN, LOCALLY HEAVY AT TIMES, IS EXPECTED IN THE LOWER  
ELEVATIONS, WITH SOME ACCUMULATING SNOWS FOR THE HIGHER TERRAIN,  
ESPECIALLY THE CASCADES AND SIERRA NEVADA RANGES. SOME WINTRY  
PRECIPITATION IS ALSO EXPECTED TO MAKE IT FARTHER INLAND INTO THE  
INTERMOUNTAIN REGIONS AS WELL.  
 
AFTER A VERY COLD MORNING, A QUICK WARM-UP SHOULD MOVE INTO THE  
NORTHERN PLAINS BY THURSDAY AND INTO FRIDAY BEHIND A WARM FRONT  
WITH WARMER THAN AVERAGE TEMPERATURES ALSO EXTENDING INTO THE  
CENTRAL PLAINS AND UPPER MISSISSIPPI VALLEY. FARTHER SOUTH,  
MOISTURE SHOULD BEGIN TO INCREASE ACROSS TEXAS BY THE END OF THE  
PERIOD AS UPPER LEVEL ENERGY MOVES TOWARDS THE REGION AND AN AREA  
OF LOW PRESSURE BEGINS TO TAKE SHAPE IN THE TEXAS PANHANDLE.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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