622  
FXUS01 KWBC 141925  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
224 PM EST FRI DEC 14 2018  
 
VALID 00Z SAT DEC 15 2018 - 00Z MON DEC 17 2018  
 
...EXCESSIVE RAINFALL POSSIBLE OVER PARTS OF SOUTHEAST INTO THE  
MID-ATLANTIC...  
 
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF  
NORTHEASTERN FLORIDA...  
   
..MODERATE TO HEAVY SNOW FOR THE NORTHERN CASCADES
 
 
...HEAVY RAIN POSSIBLE OVER PARTS OF THE OHIO VALLEY INTO THE  
MID-ATLANTIC AND PARTS OF NORTHERN CALIFORNIA...  
 
A STORM OVER THE LOWER MISSISSIPPI VALLEY WILL MOVE NORTHEASTWARD  
TO THE MID-ATLANTIC BY SUNDAY. THE SYSTEM WILL PRODUCE SHOWERS  
AND THUNDERSTORMS ALONG AND NEAR THE ASSOCIATED FRONT FROM PARTS  
OF THE TENNESSEE VALLEY INTO PARTS OF THE SOUTHEAST THAT WILL MOVE  
OFF THE SOUTHEAST COAST BY SATURDAY AFTERNOON. RAIN WILL DEVELOP  
OVER PARTS OF THE LOWER/MIDDLE MISSISSIPPI VALLEY EASTWARD INTO  
MID-ATLANTIC/SOUTHEAST THAT WILL END OVER THE LOWER/MIDDLE  
MISSISSIPPI VALLEY BY SATURDAY EVENING. THE RAIN WILL SLOWLY END  
OVER THE SOUTHEAST BY OVERNIGHT SATURDAY, WHILE THE RAIN WILL  
CONTINUE OVER PARTS OF THE EASTERN OHIO VALLEY/NORTHERN  
MID-ATLANTIC THROUGH SUNDAY. IN ADDITION, UPPER-LEVEL ENERGY OVER  
SOUTHEASTERN CANADA WILL MOVE EASTWARD OVER NORTHERN NEW ENGLAND  
AND OUT OVER THE WESTERN ATLANTIC BY SATURDAY NIGHT. THE ENERGY  
WILL AID IN PRODUCING RAIN AND SNOW OVER PARTS OF THE LOWER GREAT  
LAKES INTO NORTHERN NEW ENGLAND ENDING BY SATURDAY MORNING.  
 
MEANWHILE, A FRONT OVER THE WEST COAST WILL MOVE EASTWARD TO THE  
UPPER GREAT LAKES/MIDDLE MISSISSIPPI VALLEY INTO PARTS OF THE  
CENTRAL PLAINS/NORTHERN HIGH PLAINS BY SUNDAY. THE SYSTEM WILL  
PRODUCE RAIN AND HIGHER ELEVATION SNOW OVER PARTS OF THE PACIFIC  
NORTHWEST INTO NORTHERN/CENTRAL CALIFORNIA THAT WILL MOVE INTO THE  
NORTHERN ROCKIES AND WANE ON SATURDAY MORNING. MOISTURE AHEAD OF  
THE NEXT FRONT WILL AID IN PRODUCING RAIN ALONG THE NORTHWEST  
COAST INTO THE NORTHERN/CENTRAL CALIFORNIA COAST BY EARLY SUNDAY  
MORNING. AS THE MOISTURE MOVES INLAND, THE RAIN EXPANDS EASTWARD  
INTO THE NORTHWEST AND SNOW WILL DEVELOP AT HIGHER ELEVATIONS BY  
SUNDAY MORNING.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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