454  
FXUS01 KWBC 020757  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
257 AM EST TUE JAN 02 2018  
 
VALID 12Z TUE JAN 02 2018 - 12Z THU JAN 04 2018  
 
...TEMPERATURES WILL BE 15 TO 25 DEGREES BELOW AVERAGE FROM THE  
SOUTHERN PLAINS TO THE OHIO VALLEY...  
   
..HEAVY SNOW POSSIBLE ALONG THE SOUTHERN COAST OF LAKE SUPERIOR
 
 
...THERE IS A THREAT OF RAIN/FREEZING RAIN ALONG THE SOUTHEAST  
COAST...  
   
..SNOW POSSIBLE OVER PARTS OF THE SOUTHERN MID-ATLANTIC COAST
 
 
COLD HIGH PRESSURE OVER THE MIDDLE MISSISSIPPI/OHIO VALLEYS WILL  
SLOWLY CONTINUE TO MODIFY THROUGH THURSDAY. IN ADDITION,  
UPPER-LEVEL ENERGY OVER EASTERN ONTARIO WILL AID IN PRODUCING LAKE  
EFFECT SNOW DOWNWIND FROM THE LOWER GREAT LAKES THROUGH WEDNESDAY  
MORNING. ADDITIONALLY, EASTERLY FLOW OFF THE ATLANTIC WILL AID IN  
PRODUCING LIGHT RAIN SHOWERS OVER THE EAST COAST OF FLORIDA.  
 
MEANWHILE, ANOTHER AREA OF UPPER-LEVEL ENERGY OVER SOUTHERN  
MANITOBA WILL MOVE SOUTHEASTWARD AIDING IN THE DEVELOPMENT OF AN  
UPPER-LEVEL TROUGH OVER THE GREAT LAKES/OHIO VALLEY ON WEDNESDAY  
INTO THURSDAY. THE ASSOCIATED FRONT WILL MOVE INTO THE UPPER  
MIDWEST ON TUESDAY ADVANCING SOUTH AND EASTWARD TO THE SOUTHERN  
PLAINS/LOWER MISSISSIPPI VALLEY INTO THE OHIO VALLEY/LOWER GREAT  
LAKES BY WEDNESDAY EVENING. THE SYSTEM WILL DEVELOP SNOW OVER  
PARTS OF THE UPPER MISSISSIPPI VALLEY/UPPER GREAT LAKES ON TUESDAY  
AFTERNOON INTO TUESDAY EVENING THAT WILL MOVE INTO THE GREAT LAKES  
ON WEDNESDAY INTO WEDNESDAY EVENING.  
 
A THIRD AREA OF UPPER-LEVEL ENERGY OVER THE CENTRAL HIGH PLAINS  
WILL MOVE SOUTHEASTWARD TO THE SOUTHEAST COAST BY WEDNESDAY  
EVENING DEVELOPING AN AREA OF LOW PRESSURE OFF THE EAST-CENTRAL  
COAST OF FLORIDA ON WEDNESDAY AFTERNOON. THE AREA OF LOW PRESSURE  
WILL BEGIN TO QUICKLY DEEPEN OVERNIGHT WEDNESDAY WHILE MOVING  
NORTHEASTWARD TO OFF THE SOUTHERN MID-ATLANTIC COAST. CIRCULATION  
AROUND THE LOW WILL AID IN STREAMING MOISTURE INTO THE SOUTHEAST  
BY WEDNESDAY AFTERNOON AND INTO THE MID-ATLANTIC COAST BY  
OVERNIGHT WEDNESDAY. THERE IS A SLIGHT RISK OF RAIN/FREEZING RAIN  
DEVELOPING OVER PARTS OF THE SOUTHEAST COAST ON WEDNESDAY  
AFTERNOON INTO EVENING. WEDNESDAY EVENING INTO THURSDAY, SNOW  
WILL DEVELOP OVER PARTS OF THE SOUTHERN AND NORTHERN MID-ATLANTIC  
COAST. RAIN WILL END OVER FLORIDA BY WEDNESDAY EVENING.  
 
ELSEWHERE, AN UPPER-LEVEL LOW THAT IS SOUTHEASTWARD OFF THE  
CALIFORNIA COAST OVER THE PACIFIC WILL MOVE NORTHEASTWARD AND  
WEAKEN TO NORTHERN CALIFORNIA BY OVERNIGHT WEDNESDAY. MOISTURE  
ASSOCIATED WITH THE LOW WILL MOVE ONSHORE OVER CALIFORNIA BY  
WEDNESDAY AFTERNOON INTO THURSDAY. THE SYSTEM WILL PRODUCE LIGHT  
RAIN OVER PARTS OF NORTHERN/CENTRAL CALIFORNIA ON WEDNESDAY  
AFTERNOON INTO THURSDAY.  
 
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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