355  
FXUS01 KWBC 022002  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
301 PM EST FRI FEB 02 2018  
 
VALID 00Z SAT FEB 03 2018 - 00Z MON FEB 05 2018  
 
...UNSETTLED WEATHER WITH LOCALLY HEAVY RAIN AND SNOW WILL IMPACT  
THE PACIFIC NORTHWEST AND THE NORTHERN ROCKIES...  
 
...MUCH COLDER TEMPERATURES ARE EXPECTED TO SET UP ACROSS THE  
NORTHERN AND EASTERN U.S...  
 
...A NEW STORM DEVELOPING OVER THE MIDWEST WILL BRING A THREAT OF  
SNOW TO AREAS OF THE GREAT LAKES, CENTRAL APPALACHIANS AND  
NORTHEAST BY THE END OF THE WEEKEND...  
 
ONSHORE FLOW COMBINED WITH A SERIES OF STORM SYSTEMS WILL KEEP  
MUCH OF THE PACIFIC NORTHWEST TO THE NORTHERN ROCKIES IN AN  
UNSETTLED, WET PATTERN. LOCALLY HEAVY RAIN WILL PRIMARILY STAY  
ALONG COASTAL WASHINGTON WHILE THE HIGHER ELEVATIONS TO THE EAST  
WILL HAVE HEAVY SNOW. AREAS OF THE CASCADES, BITTEROOTS AND THE  
NORTHERN ROCKIES COULD HAVE UPWARDS OF 2 TO 3 FEET OF FRESH SNOW  
BY THE END OF THE WEEKEND. FOR THE REST OF THE WEST, MILD AND DRY  
CONDITIONS ARE EXPECTED OVER THE NEXT FEW DAYS.TEMPERATURES ACROSS  
THE SOUTHWEST, GREAT BASIN AND CALIFORNIA WILL GENERALLY BE NEAR,  
OR ABOVE SEASONAL AVERAGE.  
 
COLD OVER THE CENTRAL CONUS WILL SPREAD TO THE EAST AS A COLD  
FRONT ADVANCES THROUGH THE PLAINS, MIDWEST AND THE TENNESSEE/OHIO  
VALLEYS. COLDER TEMPERATURES ARE EXPECTED FOR PORTIONS OF THE  
MID-ATLANTIC AND NORTHEAST ON SATURDAY BUT WILL BEGIN TO MODERATE  
ON SUNDAY. AN AREA OF LOW PRESSURE OVER THE CENTRAL HIGH PLAINS  
WILL QUICKLY SPIN UP A STORM SYSTEM OVER THE CENTRAL/SOUTHERN  
PLAINS. MULTIPLE WAVES OF LOW PRESSURE WILL IMPACT THE BROADER  
MIDWEST THIS WEEKEND AND FOSTER A THREAT OF ACCUMULATING SNOW  
ACROSS THE GREAT LAKES, CENTRAL APPALACHIANS AND THE NORTHEAST.  
GENERALLY A COLD RAIN WITH POSSIBLY SOME SOME SNOW INITIALLY ALONG  
WITH POCKETS OF FREEZING RAIN CAN BE EXPECTED OVER THE  
MID-ATLANTIC REGION. HEAVIER RAIN MEANWHILE IS EXPECTED FARTHER  
SOUTH FROM THE TENNESSEE VALLEY SOUTH TO THE GULF COAST STATES AND  
PARTS OF THE SOUTHEAST AS A SEPARATE AREA OF LOW PRESSURE IMPACTS  
THESE AREAS AND BRINGS PLENTY OF MOISTURE IN OFF THE GULF OF  
MEXICO.  
 
ANOTHER BLAST OF ARCTIC AIR WILL PLUNGE SOUTH FROM CANADA LATE  
THIS WEEKEND AND WILL SETTLE IN BY THE BEGINNING OF NEXT WEEK.  
MAXIMUM TEMPERATURES WILL STRUGGLE TO GET OUT OF THE SINGLE DIGITS  
AND NIGHTTIME LOWS WILL BE WELL BELOW ZERO. THESE TEMPERATURES  
COUPLED WITH THE WIND WILL RESULT IN DANGEROUSLY COLD WINDCHILL  
VALUES.  
 
CAMPBELL/ORRISON  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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