995  
FXUS01 KWBC 082016  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
315 PM EST FRI FEB 08 2019  
 
VALID 00Z SAT FEB 09 2019 - 00Z MON FEB 11 2019  
 
...SNOW ACROSS THE PACIFIC NORTHWEST THROUGH TONIGHT IS EXPECTED  
SPREAD FARTHER SOUTH AND EAST DURING THE WEEKEND...  
 
...COLD WEATHER EXPECTED TO PERSIST ACROSS THE EASTERN TWO-THIRDS  
OF THE COUNTRY THROUGH THE WEEKEND...  
 
...WINTRY WEATHER EXPECTED TO SPREAD RAPIDLY FROM WEST TO EAST  
FROM THE NORTHERN PLAINS TO THE NORTHEAST ON SUNDAY...  
 
AN UPPER-LEVEL LOW IS EXPECTED TO AMPLIFY AS IT ROTATES NEAR THE  
COAST OF THE PACIFIC NORTHWEST THROUGH THE WEEKEND. THE DYNAMIC  
INTERACTIONS BETWEEN A SHARP ARCTIC FRONT AND THE AMPLIFYING UPPER  
LOW WILL CONTINUE TO BE THE RECIPE FOR A SNOW EVENT TO CONTINUE  
ACROSS THE PACIFIC NORTHWEST THROUGH TONIGHT INTO EARLY ON  
SATURDAY. THE SNOW SHOULD BEGIN TO TAPER OFF FROM NORTH TO SOUTH  
ON SATURDAY ACROSS WASHINGTON STATE BUT WILL OVERSPREAD MUCH OF  
OREGON AND NORTHERN CALIFORNIA. THE SNOW WILL THEN SPREAD INTO  
THE SIERRA NEVADA, THE GREAT BASIN, AND THE INTERMOUNTAIN WEST ON  
SUNDAY BEHIND A COLD FRONT. MUCH OF THE NORTHERN ROCKIES WILL  
CONTINUE TO HAVE OCCASIONAL LIGHT SNOW THROUGH THE WEEKEND DUE TO  
THE PROXIMITY OF AN ARCTIC FRONT AND A LOW PRESSURE CENTER PASSING  
TO THE SOUTHWEST.  
 
THE SOUTHERN ATLANTIC COAST WILL ENJOY THE LAST TASTE OF SPRING  
THIS FRIDAY AFTERNOON BEFORE ARCTIC AIR POURS INTO THE REGION  
BEHIND AN ARCTIC COLD FRONT THIS EVENING. THIS ARCTIC AIR MASS  
WILL CONTINUE TO BRING MUCH BELOW NORMAL TEMPERATURES FOR MUCH OF  
THE EASTERN TWO-THIRDS OF THE COUNTRY THROUGH THE WEEKEND. THE  
COLDEST AIR WILL REMAIN OVER NORTHERN MONTANA WHERE SUB-ZERO  
TEMPERATURES ARE FORECAST TO LAST THROUGH THE WEEKEND.  
 
BY SUNDAY, AN UPPER-LEVEL TROUGH CURRENTLY BRINGING RAIN INTO  
CENTRAL CALIFORNIA WILL REACH THE CENTRAL PLAINS ON SUNDAY. THE  
INTERACTION OF THIS UPPER TROUGH WITH AN ARCTIC FRONT ACROSS THE  
CENTRAL PLAINS WILL BEGIN TO BRING AN INCREASING CHANCE OF WINTRY  
WEATHER INTO THE NORTHERN PLAINS AND THE MIDWEST ON SUNDAY. A  
ZONE OF MIXED PRECIPITATION APPEARS LIKELY ACROSS THE  
MID-MISSISSIPPI VALLEY SUNDAY MORNING, SPREADING INTO THE OHIO  
VALLEY DURING THE DAY ON SUNDAY, FOLLOWED BY THE MID-ATLANTIC  
SUNDAY EVENING. FARTHER NORTH, SNOW IS EXPECTED TO SPREAD RAPIDLY  
FROM THE NORTHERN PLAINS TO THE UPPER MIDWEST SUNDAY MORNING,  
REACHING THE NORTHERN MID-ATLANTIC, UPSTATE NEW YORK AND SOUTHERN  
NEW ENGLAND BY SUNDAY EVENING. MEANWHILE, RAIN IS EXPECTED TO  
EXPAND FROM EASTERN TEXAS TOWARDS THE TENESSEE VALLEY ON SUNDAY,  
REACHING THE SOUTHERN MID-ATLANTIC REGION BY SUNDAY EVENING. RAIN  
COULD BE HEAVY ENOUGH TO RESULT IN FLASH FLOODING OVER PARTS OF  
THE MID-MISSISSIPPI VALLEY ON SUNDAY.  
 
KONG  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  
 

 
 
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