222  
FXUS01 KWBC 250748  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
248 AM EST THU JAN 25 2018  
 
VALID 12Z THU JAN 25 2018 - 12Z SAT JAN 27 2018  
 
...PACIFIC STORM SYSTEM TRACKING EASTWARD ACROSS THE WEST WITH  
HIGH PRESSURE OVER THE EASTERN U.S....  
 
HIGH PRESSURE AND WARMER TEMPERATURES WILL EXPAND FROM THE CENTRAL  
U.S. TO THE EAST COAST INTO THE WEEKEND. AFTERNOON HIGHS WILL  
LARGELY BE NEAR OR ABOVE SEASONAL AVERAGE FOR LATE JANUARY -  
RANGING FROM THE 40S ACROSS SOUTHERN PORTIONS OF THE NORTHEAST,  
50S TO LOW 60S IN THE MID-ATLANTIC AND THE UPPER 60S TO 70S IN THE  
SOUTHEAST BY SUNDAY. MUCH OF THE CENTRAL AND EASTERN U.S. WILL BE  
FAIRLY DRY THROUGH THE END OF WEEK, EXCEPT FOR SOUTH TEXAS, WHERE  
SCATTERED SHOWERS AND THUNDERSTORMS WILL BE MOST LIKELY.  
 
A MAJORITY OF THE WEST COAST, GREAT BASIN AND INTERMOUNTAIN REGION  
WILL REMAIN IN A PERSISTENT WET PATTERN AS A PACIFIC COLD FRONT  
TRACKS THROUGH THE INTERMOUNTAIN WEST TO THE HIGH PLAINS. HEAVY  
RAIN WILL SPAN FROM THE WASHINGTON COAST SOUTH TO PORTIONS OF THE  
NORTHERN CALIFORNIA AND HEAVY SNOW IS FORECAST FOR THE CASCADES  
AND NORTHERN ROCKIES. WINTER WEATHER ADVISORIES AND WINTER STORM  
WARNINGS ARE IN EFFECT FOR PORTIONS OF THE CASCADES, SOUTHWEST  
OREGON AND NORTHERN CALIFORNIA, AS WELL AS, A FEW COUNTIES IN  
IDAHO AND SOUTHWEST MONTANA.  
 
ALTHOUGH THE INTENSITY OF SNOWFALL IS WANING THIS MORNING,  
ACCUMULATIONS OF ONE TO TWO FEET OF SNOW WILL BE LIKELY IN THE  
MOUNTAINS BY THIS AFTERNOON. ANOTHER SURGE OF MOISTURE WILL SPREAD  
ACROSS THE PACIFIC NORTHWEST BY THE END OF THE WEEKEND AS THE NEXT  
PACIFIC SYSTEM APPROACHES THE COAST. HEAVY COASTAL RAIN AND HEAVY  
MOUNTAIN SNOW WILL LIKELY DEVELOP FOR WASHINGTON AND OREGON  
SATURDAY.  
 
CAMPBELL  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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