399  
FXUS01 KWBC 171950  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
249 PM EST SUN FEB 17 2019  
 
VALID 00Z MON FEB 18 2019 - 00Z WED FEB 20 2019  
 
...HEAVY RAIN POSSIBLE OVER PARTS OF THE LOWER  
MISSISSIPPI/TENNESSEE VALLEYS AND PARTS OF THE SOUTHERN  
APPALACHIANS...  
 
...HEAVY SNOW POSSIBLE OVER PARTS OF LOWER GREAT LAKES INTO NEW  
ENGLAND AND OVER PARTS OF THE SOUTHERN/CENTRAL ROCKIES/SOUTHWEST...  
 
...TEMPERATURES WILL BE 20 TO 35 DEGREES BELOW AVERAGE OVER THE  
NORTHERN/CENTRAL PLAINS...  
 
A STORM OVER THE OHIO/TENNESSEE VALLEYS WILL MOVE EASTWARD OFF THE  
MID-ATLANTIC COAST BY MONDAY MORNING. THE SYSTEM WILL PRODUCE  
SNOW OVER PARTS OF THE GREAT LAKES INTO PARTS OF THE OHIO  
VALLEY/NORTHERN MID-ATLANTIC THAT WILL MOVE INTO NEW ENGLAND  
OVERNIGHT SUNDAY. THE SNOW WILL BEGIN TO TAPER OFF FROM WEST TO  
EAST OVER THE GREAT LAKES INTO THE NORTHEAST MONDAY AFTERNOON INTO  
EARLY TUESDAY MORNING. THE SYSTEM WILL ALSO PRODUCE RAIN OVER THE  
OHIO/TENNESSEE VALLEYS EASTWARD TO THE MID-ATLANTIC INTO THE  
SOUTHEAST THAT WILL MOVE OFF THE COAST BY MONDAY EVENING.  
ADDITIONALLY, AN AREA OF SHOWERS AND THUNDERSTORMS WILL DEVELOP  
ALONG AND AHEAD OF THE ASSOCIATED FRONT FROM PARTS OF THE  
SOUTHEAST TO THE CENTRAL GULF COAST THAT WILL, LIKEWISE, MOVE  
EASTWARD INTO SOUTHEAST COAST AND FLORIDA BY MONDAY. THE SHOWERS  
AND THUNDERSTORMS WILL LINGER OVER FLORIDA THROUGH TUESDAY. ALONG  
THE RAIN/SNOW LINE THERE WILL BE POCKETS OF RAIN/FREEZING RAIN  
OVER PARTS OF THE NORTHERN MID-ATLANTIC THROUGH MONDAY MORNING.  
 
MEANWHILE, A DEVELOPING UPPER-LEVEL LOW OVER THE GREAT BASIN WILL  
MOVE INTO PARTS OF THE SOUTHWEST BY TUESDAY MORNING CONTINUING TO  
MOVE EASTWARD INTO THE SOUTHERN ROCKIES BY WEDNESDAY. THE STORM  
WILL PRODUCE SNOW OVER THE INTERIOR HIGHER ELEVATION OVER THE  
PACIFIC NORTHWEST INTO CALIFORNIA AND SNOW OVER THE NORTHERN  
INTERMOUNTAIN REGION INTO THE GREAT BASIN AND THE NORTHERN/CENTRAL  
ROCKIES INTO PARTS OF THE SOUTHWEST. THE SNOW WILL BEGIN TO TAPER  
OFF OVER THE PACIFIC NORTHWEST, CALIFORNIA, AND THE GREAT BASIN  
OVERNIGHT SUNDAY. RAIN ALONG PARTS OF THE PACIFIC NORTHWEST COAST  
AND THE CALIFORNIA COAST WILL ALSO TAPER OFF OVERNIGHT SUNDAY. AS  
THE UPPER LOW MOVES INTO THE SOUTHWEST, MOISTURE FROM THE WESTERN  
GULF OF MEXICO WILL START FLOWING NORTHWESTWARD INTO SOUTHERN  
PLAINS AS THE SNOW MOVES INTO PARTS OF THE CENTRAL PLAINS  
OVERNIGHT MONDAY. ON TUESDAY, THE SNOW WILL MOVE INTO THE  
SOUTHERN HIGH PLAINS AND INTO THE MIDDLE MISSISSIPPI VALLEY BY  
TUESDAY EVENING. OVERNIGHT MONDAY, SHOWERS AND THUNDERSTORMS WILL  
DEVELOP OVER PARTS OF THE WESTERN GULF COAST INTO PARTS OF THE  
SOUTHERN PLAINS BY TUESDAY EVENING. RAIN WILL DEVELOP OVER PARTS  
OF THE SOUTHEAST/TENNESSEE VALLEY INTO PARTS OF THE SOUTHERN  
PLAINS ON TUESDAY INTO WEDNESDAY.  
 
ELSEWHERE, UPPER-LEVEL ENERGY OVER THE NORTHERN HIGH PLAINS INTO  
THE MIDDLE MISSISSIPPI VALLEY WILL AID IN PRODUCING SNOW OVER  
PARTS OF THE AREA THROUGH MONDAY AFTERNOON.  
 
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  
 

 
 
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