681  
FXUS01 KWBC 212019  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
318 PM EST SUN JAN 21 2018  
 
VALID 00Z MON JAN 22 2018 - 00Z WED JAN 24 2018  
 
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF  
EASTERN TEXAS AND THE LOWER MISSISSIPPI VALLEY...  
 
...HEAVY SNOW POSSIBLE FROM THE CENTRAL PLAINS TO THE UPPER  
MISSISSIPPI VALLEY AND OVER THE CASCADES...  
 
...RAIN/FREEZING RAIN POSSIBLE FROM THE CENTRAL PLAINS INTO THE  
UPPER GREAT LAKES AND INTO NORTHERN NEW ENGLAND...  
 
...HEAVY RAIN POSSIBLE OVER PARTS OF THE PACIFIC  
NORTHWEST/NORTHERN CALIFORNIA AND NORTHERN NEW ENGLAND COAST...  
 
A STORM OVER THE CENTRAL PLAINS WILL LIFT NORTHEASTWARD TO THE  
GREAT LAKES BY TUESDAY. THE SYSTEM WILL PRODUCE SNOW OVER PARTS  
OF THE CENTRAL ROCKIES THAT WILL END OVERNIGHT SUNDAY. SNOW WILL  
ALSO DEVELOP OVER THE CENTRAL PLAINS, ON SUNDAY EVENING, THAT WILL  
EXPAND INTO UPPER MISSISSIPPI VALLEY/UPPER GREAT LAKES BY MONDAY  
MORNING. THE SNOW WILL BE HEAVY AT TIMES OVER THE CENTRAL PLAINS  
OVERNIGHT SUNDAY AND OVER PARTS OF THE UPPER MISSISSIPPI VALLEY ON  
MONDAY INTO MONDAY EVENING. OVERNIGHT MONDAY, THE SNOW WILL STOP  
OVER THE CENTRAL PLAINS AS SNOW MOVES INTO THE MIDDLE MISSISSIPPI  
VALLEY AND WESTERN OHIO VALLEY. ON MONDAY AFTERNOON INTO EVENING,  
SNOW WILL DEVELOP OVER PARTS OF NORTHERN NEW ENGLAND CONTINUING  
INTO TUESDAY.  
 
IN ADDITION, RAIN WILL DEVELOP OVER PARTS OF THE MIDDLE  
MISSISSIPPI VALLEY INTO THE GREAT LAKES ON SUNDAY EVENING THAT  
WILL EXPAND INTO THE OHIO VALLEY/LOWER GREAT LAKES BY MONDAY  
MORNING. THE RAIN WILL EXPAND INTO SOUTHERN NEW ENGLAND BY  
MONDAY EVENING AND INTO THE NORTHERN MID-ATLANTIC OVERNIGHT  
MONDAY. IN THE TRANSITION ZONE BETWEEN THE RAIN AND SNOW,  
RAIN/FREEZING RAIN WILL DEVELOP IN BANDS FROM THE CENTRAL PLAINS  
INTO THE GREAT LAKES, ON SUNDAY EVENING INTO MONDAY, AND INTO NEW  
ENGLAND OVERNIGHT MONDAY INTO TUESDAY.  
 
ADDITIONALLY, SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER PARTS OF  
THE SOUTHERN PLAINS INTO THE LOWER MISSISSIPPI VALLEY ON MONDAY  
EVENING ADVANCING TO THE TENNESSEE VALLEY/CENTRAL GULF COAST BY  
MONDAY MORNING. BY MONDAY EVENING, THE SHOWERS AND THUNDERSTORMS  
WILL MOVE TO PARTS OF THE OHIO VALLEY SOUTHWARD TO THE EASTERN  
GULF COAST AND TO PARTS OF THE MID-ATLANTIC INTO THE SOUTHEAST BY  
TUESDAY MORNING.  
 
MEANWHILE, UPPER-LEVEL ENERGY WILL MOVE INLAND OVER THE PACIFIC  
NORTHWEST MOVING EASTWARD TO THE NORTHERN PLAINS BY TUESDAY.  
 
MORE TO FOLLOW  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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