480  
FXUS01 KWBC 142001  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
300 PM EST MON JAN 14 2019  
 
VALID 00Z TUE JAN 15 2019 - 00Z THU JAN 17 2019  
   
..HEAVY PRECIPITATION RETURNING TO WESTERN U.S.
 
 
...RELATIVELY QUIET WEATHER ACROSS THE EASTERN TWO-THIRDS OF THE  
COUNTRY...  
 
AFTER THE RECENT SNOW EVENT ACROSS THE MIDWEST THROUGH THE  
MID-ATLANTIC, OUR ATTENTION ARE TURNING TO THE WEST COAST AS  
MULTIPLE ENERGETIC WEATHER SYSTEMS FROM THE PACIFIC ARE FORECAST  
TO MOVE ONSHORE DURING THE NEXT FEW DAYS. HEAVY PRECIPITATION  
ASSOCIATED WITH FIRST WAVE OF THESE WEATHER SYSTEMS IS ALREADY  
IMPACTING CENTRAL AND SOUTHERN CALIFORNIA. THE RESULT IS  
WIDESPREAD RAIN WHICH COULD CAUSE SOME LOCALIZED FLOODING,  
ESPECIALLY FOR THE COASTAL MOUNTAIN RANGES IN SOUTHERN CALIFORNIA.  
FARTHER INLAND, HEAVY SNOW IS LIKELY FOR THE SIERRA NEVADA WHERE  
ACCUMULATIONS COULD EXCEED TWO FEET THROUGH WEDNESDAY. THE  
ASSOCIATED MOISTURE WILL PENETRATE WELL INLAND DURING THE NEXT  
COUPLE OF DAYS, REACHING THE CENTRAL ROCKIES IN THE FORM OF  
MOUNTAIN SNOWS ON WEDNESDAY. IN THE MEANTIME, MOISTURE ASSOCIATED  
WITH A MORE ENERGETIC LOW PRESSURE SYSTEM IS FORECAST TO REACH THE  
PACIFIC NORTHWEST COAST AND NORTHERN CALIFORNIA LATER ON WEDNESDAY.  
 
ELSEWHERE ACROSS MUCH THE REST OF THE COUNTRY, RELATIVELY QUIET  
WEATHER IS EXPECTED THROUGH WEDNESDAY AS A LARGE SURFACE HIGH  
PRESSURE SYSTEM REMAINS DOMINATING MUCH OF THE SOUTH.  
TEMPERATURES WILL BE WARMER THAN NORMAL OVER THE NORTHERN AND  
CENTRAL PLAINS ON TUESDAY. BUT A STRONG COLD FRONT WILL BRING  
ARCTIC AIR BACK INTO THE NORTHERN PLAINS ON TUESDAY, REACHING THE  
CENTRAL PLAINS ON WEDNESDAY. SOME MIXED PRECIPITATION IS EXPECTED  
TO MOVE ACROSS THE GREAT LAKES TUESDAY NIGHT, REACHING NEW ENGLAND  
AS SNOW SHOWERS ON WEDNESDAY.  
 
AS THE HIGH PRESSURE SYSTEM IN THE SOUTH MOVES VERY SLOWLY TOWARD  
FLORIDA, RETURN FLOW FROM THE GULF OF MEXICO WILL BEGIN TO BRING  
INCREASING MOISTURE THROUGH EASTERN TEXAS AND INTO THE CENTRAL  
PLAINS, WHERE SOME SHOWERS ARE LIKELY ON WEDNESDAY. IN ADDITION,  
THE NORTHERN EXTENT OF THE MOISTURE COULD RESULT IN SOME WINTRY  
PRECIPITATION ACROSS THE NORTH-CENTRAL PLAINS ON WEDNESDAY AS WELL.  
 
KONG  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  
 

 
 
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