329  
FXUS01 KWBC 040757  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
257 AM EST MON DEC 04 2017  
 
VALID 12Z MON DEC 04 2017 - 12Z WED DEC 06 2017  
 
...HEAVY SNOW POSSIBLE OVER THE UPPER MISSISSIPPI VALLEY AND PARTS  
OF THE UPPER GREAT LAKES..  
   
..HEAVY RAIN POSSIBLE OVER PARTS OF UPPER PENINSULA OF MICHIGAN
 
 
...HEAVY RAIN POSSIBLE OVER PARTS OF THE SOUTHERN  
APPALACHIANS/TENNESSEE VALLEY...  
 
...TEMPERATURES WILL BE 20 TO 30 DEGREES ABOVE AVERAGE OVER PARTS  
OF THE MIDDLE/UPPER MISSISSIPPI VALLEY...  
 
A STRONG STORM OVER THE MIDDLE MISSOURI VALLEY WILL ADVANCE  
NORTHEASTWARD INTO CENTRAL ONTARIO BY TUESDAY EVENING. THE SYSTEM  
WILL PRODUCE SNOW OVER PARTS OF THE NORTHERN/CENTRAL ROCKIES  
ENDING BY MONDAY EVENING. SNOW WILL ALSO DEVELOP OVER THE  
NORTHERN PLAINS EXPANDING INTO PARTS OF THE UPPER MISSISSIPPI  
VALLEY BY MONDAY EVENING WITH THE SNOW BECOMING HEAVY. THE HEAVY  
SNOW WILL EXPAND INTO PARTS OF THE UPPER GREAT LAKES OVERNIGHT  
MONDAY WITH THE HEAVY SNOW MOVING INTO SOUTHWESTERN ONTARIO ON  
TUESDAY INTO TUESDAY AFTERNOON. LIGHT SNOW WILL CONTINUE OVER  
PARTS OF THE UPPER GREAT LAKES TUESDAY AFTERNOON INTO TUESDAY  
EVENING.  
 
IN ADDITION, SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER PARTS OF  
THE UPPER/MIDDLE MISSISSIPPI VALLEY INTO PARTS OF THE UPPER GREAT  
LAKES ON MONDAY MORNING. SHOWERS AND THUNDERSTORMS WILL ALSO  
EXPAND SOUTHWARD ALONG THE ASSOCIATED FRONT OVER THE MIDDLE  
MISSISSIPPI VALLEY INTO PARTS OF THE SOUTHERN PLAINS BY MONDAY  
EVENING. ON TUESDAY, SHOWERS AND THUNDERSTORMS WILL MOVE INTO THE  
LOWER MISSISSIPPI VALLEY THAT WILL BECOME CONFINED TO THE CENTRAL  
GULF COAST BY TUESDAY EVENING. ADDITIONALLY, RAIN THAT WILL BE  
HEAVY AT TIMES WILL MOVE INTO THE UPPER GREAT LAKES LATE MONDAY  
MORNING INTO MONDAY EVENING. OVERNIGHT MONDAY, THE RAIN WILL MOVE  
EASTWARD INTO THE LOWER GREAT LAKES TO PARTS OF THE LOWER  
MISSISSIPPI VALLEY/SOUTHERN PLAINS. ON TUESDAY, RAIN WILL DEVELOP  
OVER PARTS OF THE MID-ATLANTIC/NORTHEAST AS THE RAIN ALONG THE  
FRONT MOVES EASTWARD TO THE NORTHEAST ROUGHLY SOUTHWESTWARD TO THE  
CENTRAL/SOUTHERN APPALACHIANS INTO THE LOWER MISSISSIPPI VALLEY BY  
TUESDAY EVENING.  
 
MEANWHILE, A SECONDARY FRONT WILL MOVE SOUTHWARD OUT OF  
WEST-CENTRAL CANADA MOVING INTO THE MIDDLE MISSISSIPPI VALLEY BY  
TUESDAY EVENING. LIGHT SNOW WILL DEVELOP OVER PARTS OF THE  
NORTHERN HIGH PLAINS OVERNIGHT MONDAY MOVING INTO PARTS OF THE  
NORTHERN PLAINS BY TUESDAY EVENING. ELSEWHERE, MOISTURE FROM THE  
WESTERN GULF OF MEXICO WILL MOVE NORTHWARD OVER THE SOUTHERN  
PLAINS AS UPPER-LEVEL ENERGY MOVES EASTWARD OVER THE LOWER  
MISSISSIPPI VALLEY AND DISSIPATING OVER PARTS OF THE SOUTHEAST  
OVERNIGHT MONDAY. THE ENERGY AND MOISTURE WILL AID IN PRODUCING  
SHOWERS AND THUNDERSTORMS OVER PARTS OF THE WESTERN GULF  
COAST/SOUTHERN PLAINS ON MONDAY THAT WILL EXPAND INTO PARTS OF THE  
LOWER MISSISSIPPI VALLEY OVERNIGHT MONDAY.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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