528  
FXUS01 KWBC 262023  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
322 PM EST SUN NOV 26 2017  
 
VALID 00Z MON NOV 27 2017 - 00Z WED NOV 29 2017  
   
..HEAVY RAIN AND SNOW FOR THE SIERRAS
 
 
...HEAVY RAIN POSSIBLE OVER THE PACIFIC NORTHWEST COAST AND HEAVY  
SNOW FOR THE CASCADES...  
 
...LAKE EFFECT SNOW OVER PARTS OF THE LOWER GREAT LAKES AND  
NORTHERN APPALACHIANS...  
 
...TEMPERATURES WILL BE 20 TO 30 DEGREES ABOVE AVERAGE FOR  
CENTRAL/NORTHERN PLAINS AND PARTS OF THE SOUTHERN HIGH PLAINS...  
 
A FRONT OVER THE NORTHERN INTERMOUNTAIN REGION INTO THE GREAT  
BASIN AND SOUTHERN CALIFORNIA WILL MOVE EASTWARD TO THE UPPER  
GREAT LAKES/MIDDLE MISSISSIPPI VALLEY AND THE CENTRAL/SOUTHERN  
PLAINS BY TUESDAY. A HEAD OF THE FRONT, TEMPERATURES WILL BE WELL  
ABOVE AVERAGE OVER THE PLAINS AS A STRONG UPPER-LEVEL RIDGE WILL  
BE OVER THE HIGH PLAINS UNTIL MONDAY EVENING. WITH THE FRONT  
MOVING INLAND, THE SNOW LEVELS WILL LOWER OVER THE NORTHWEST AS  
HEAVY SNOW DEVELOPS OVER THE CASCADES THROUGH MONDAY MORNING.  
LIGHT SNOW WILL CONTINUE OVER THE CASCADES THROUGH MONDAY EVENING.  
LIKEWISE, HEAVY RAIN WILL DEVELOP OVER THE PACIFIC NORTHWEST  
THROUGH EARLY MONDAY MORNING. IN ADDITION, RAIN WILL DEVELOP OVER  
PARTS OF NORTHERN/CENTRAL CALIFORNIA THROUGH MONDAY EVENING.  
HEAVY RAIN AND SNOW WILL ALSO DEVELOP OVER THE SIERRAS THROUGH  
MONDAY EVENING, TOO. OVERNIGHT SUNDAY, SNOW AND LOWER ELEVATION  
RAIN WILL DEVELOP OVER PARTS OF THE NORTHERN INTERMOUNTAIN  
REGION/NORTHERN ROCKIES INTO PARTS OF THE GREAT BASIN THROUGH LATE  
MONDAY NIGHT. THE RAIN WILL BE CONFINED TO THE OLYMPIC PENINSULA  
MONDAY NIGHT INTO TUESDAY MORNING. AS THE BOUNDARY BEGINS TO MOVE  
ONTO THE PLAINS, SNOW WILL DEVELOP OVER PARTS OF THE CENTRAL  
ROCKIES MONDAY EVENING INTO TUESDAY. ADDITIONALLY, THE BOUNDARY  
WILL MOVE INTO DRY AIR OVER THE PLAINS MONDAY EVENING INTO  
TUESDAY. THE FRONT WILL BE DRY ACROSS THE NORTHERN/CENTRAL PLAINS  
MONDAY EVENING INTO TUESDAY.  
 
MEANWHILE, A WEAK FRONT WILL MOVE OVER THE LOWER GREAT LAKES INTO  
THE NORTHEAST THROUGH MONDAY EVENING. THE SYSTEM WILL PRODUCE  
LIGHT SNOW OVER PARTS OF THE LOWER GREAT LAKES INTO THE NORTHERN  
APPALACHIANS THAT WILL MOVE INTO PARTS OF THE NORTHEAST LATE  
SUNDAY NIGHT, MOVING OFF THE NORTHEAST COAST BY MONDAY AFTERNOON.  
LAKES EFFECT SNOW WILL DEVELOP DOWNWIND OF LAKES ONTARIO ON MONDAY  
INTO MONDAY EVENING. ELSEWHERE, UPPER-LEVEL ENERGY WILL MOVE OVER  
THE SOUTHERN TIP OF FLORIDA MONDAY AFTERNOON INTO TUESDAY. THE  
ENERGY WILL AID IN PRODUCING SHOWERS AND THUNDERSTORMS OVER THE  
SOUTHERN TIP OF FLORIDA MONDAY EVENING INTO TUESDAY.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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