680  
FXUS01 KWBC 220801  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
301 AM EST TUE JAN 22 2019  
 
VALID 12Z TUE JAN 22 2019 - 12Z THU JAN 24 2019  
 
...A WINTER STORM IS EXPECTED TO IMPACT PARTS OF THE CENTRAL  
PLAINS INTO THE UPPER MIDWEST AND THE GREAT LAKES THROUGH  
WEDNESDAY...  
   
..ACTIVE WEATHER RETURNS TO THE PACIFIC NORTHWEST
 
 
   
..VERY COLD CONDITIONS ACROSS THE EASTERN U.S. WILL MODERATE
 
 
A LOW PRESSURE SYSTEM CONTINUES TO CONSOLIDATE AS IT EXITS THE  
CENTRAL ROCKIES INTO THE CENTRAL PLAINS THIS TUESDAY MORNING.  
PARTS OF THE CENTRAL HIGH PLAINS HAS ALREADY BEEN IMPACTED BY  
BLIZZARD OR NEAR-BLIZZARD CONDITIONS AS THE STORM INTENSIFIES.  
THIS LOW IS FORECAST TO TRACK EAST-NORTHEAST ACROSS THE CENTRAL  
PLAINS AND INTO THE GREAT LAKES THROUGH WEDNESDAY. A SWATH OF  
SNOW IS EXPECTED TO THE NORTH OF THE STORM TRACK WITH A FOOT OF  
ACCUMULATION POSSIBLE OVER THE GREAT LAKES. SOME MIXED  
PRECIPITATION CAN ALSO BE EXPECTED NEAR THE STORM TRACK, AS WELL  
AS PARTS OF INTERIOR NORTHEAST ON WEDNESDAY. SOUTH OF THE STORM  
TRACK, RAIN IS EXPECTED TO FALL AHEAD OF A COLD FRONT, ESPECIALLY  
OVER THE SOUTHEAST LATER ON WEDNESDAY INTO THURSDAY MORNING WHERE  
HEAVY RAIN ALONG WITH THUNDERSTORMS ARE POSSIBLE.  
 
BEFORE THE ARRIVAL OF THE AFOREMENTIONED COLD FRONT, VERY COLD AIR  
WILL DOMINATE MUCH OF THE EASTERN SEABOARD. HOWEVER, AS THE COLD  
HIGH PRESSURE SYSTEM GIVES WAY TO THE DEVELOPING LOW PRESSURE  
SYSTEM COMING FROM THE CENTRAL PLAINS, TEMPERATURES WILL MODERATE  
TO ABOVE NORMAL LEVELS ON WEDNESDAY UNDER INCREASING SOUTHERLY  
FLOW.  
 
MEANWHILE, MOISTURE ASSOCIATED WITH A RATHER ENERGETIC PACIFIC  
CYCLONE IS ABOUT TO REACH THE PACIFIC NORTHWEST. RAIN COULD  
BECOME HEAVY LATER TODAY OVER THE COASTAL SECTIONS AS WELL AS  
ACROSS THE OLYMPIC PENINSULA. THE MOISTURE WILL THEN CONTINUE TO  
PENETRATE FURTHER INLAND, REACHING THE INTERMOUNTAIN REGION ON  
WEDNESDAY IN THE FORM OF SNOW. THE SNOW WILL MOVE INTO THE  
NORTHERN ROCKIES WEDNESDAY NIGHT AND EARLY THURSDAY JUST AS THE  
NEXT SURGE OF ARCTIC AIR FROM CENTRAL CANADA ARRIVES.  
 
 
KONG  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  
 

 
 
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