805  
FXUS01 KWBC 261112  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
612 AM EST WED DEC 26 2018  
 
VALID 12Z WED DEC 26 2018 - 12Z FRI DEC 28 2018  
 
...WINTER STORM WITH HEAVY SNOWFALL EXPECTED FROM THE CENTRAL AND  
NORTHERN GREAT PLAINS TO THE UPPER GREAT LAKES TODAY AND  
THURSDAY...  
 
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF  
THE SOUTHERN PLAINS...  
 
...HEAVY RAIN POSSIBLE FROM THE SOUTHERN PLAINS TO THE SOUTHERN  
APPALACHIANS AND TENNESSEE VALLEY...  
 
A STRONG STORM OVER THE SOUTHERN ROCKIES/SOUTHERN HIGH PLAINS WILL  
MOVE NORTHEASTWARD TO THE MIDDLE MISSISSIPPI VALLEY BY THURSDAY  
EVENING. THE STORM WILL SPREAD HEAVY SNOW AND GUSTY WIND TO MUCH  
OF THE CENTRAL/NORTHERN PLAINS AND UPPER MIDWEST WEDNESDAY INTO  
THURSDAY. SHOWERS AND THUNDERSTORMS WILL DEVELOP ALONG AND AHEAD  
OF THE ASSOCIATED FRONT OVER THE SOUTHERN PLAINS THAT WILL MOVE  
EASTWARD TO THE WESTERN OHIO VALLEY TO THE LOWER MISSISSIPPI  
VALLEY BY THURSDAY EVENING. RAIN WILL DEVELOP OVER THE CENTRAL  
PLAINS THAT WILL MOVE NORTHEASTWARD INTO THE GREAT LAKES/OHIO  
VALLEY BY THURSDAY. OVERNIGHT THURSDAY AREAS OF RAIN/FREEZING  
RAIN WILL DEVELOP OVER PARTS OF THE NORTHEAST THAT WILL CHANGE  
OVER TO ALL RAIN BY FRIDAY. IN ADDITION, LOWER ELEVATION RAIN AND  
SNOW WILL DEVELOP OVER PARTS OF THE SOUTHWEST/SOUTHERN ROCKIES  
WITH SNOW EXTENDING FROM THE CENTRAL ROCKIES/EASTERN GREAT BASIN  
INTO THE NORTHERN PLAINS/NORTHERN ROCKIES ON WEDNESDAY. SNOW WILL  
MOVE INTO PARTS OF THE UPPER MISSISSIPPI VALLEY/UPPER GREAT LAKES  
OVERNIGHT WEDNESDAY INTO THURSDAY. THE SNOW AND RAIN WILL END  
BRIEFLY OVER PARTS OF THE SOUTHWEST/SOUTHERN ROCKIES OVERNIGHT  
WEDNESDAY, TOO, BEFORE THE NEXT SYSTEM ON THURSDAY EVENING INTO  
FRIDAY. ALSO OVERNIGHT WEDNESDAY, MOISTURE FROM THE GULF OF  
MEXICO AND THE ATLANTIC WILL MOVE INTO PARTS OF THE SOUTHEAST THAT  
WILL AID IN THE DEVELOPMENT OF SHOWERS AND THUNDERSTORMS OVER  
PARTS OF THE SOUTHEAST THURSDAY INTO FRIDAY.  
 
MEANWHILE, AN AREA OF UPPER-LEVEL ENERGY ALONG THE NORTHWEST COAST  
WILL MOVE SOUTHEASTWARD TO THE GREAT BASIN/SOUTHWEST BY THURSDAY  
EVENING FORMING AN UPPER-LEVEL LOW. THE ENERGY WILL AID IN  
PRODUCING RAIN AND HIGHER ELEVATION SNOW OVER PARTS OF THE PACIFIC  
NORTHWEST ON WEDNESDAY MORNING. THE SNOW WILL EXPAND INLAND TO  
THE NORTHERN INTERMOUNTAIN REGION/GREAT BASIN OVERNIGHT WEDNESDAY  
INTO THURSDAY MORNING. THE RAIN AND SNOW WILL WANE OVER PARTS OF  
THE PACIFIC NORTHWEST/NORTHERN INTERMOUNTAIN REGION THURSDAY  
AFTERNOON INTO EVENING. SNOW WILL MOVE INTO PARTS OF THE  
SOUTHWEST/SOUTHERN ROCKIES THURSDAY EVENING INTO FRIDAY.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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