117  
FXUS01 KWBC 120812  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
412 AM EDT THU OCT 12 2017  
 
VALID 12Z THU OCT 12 2017 - 12Z SAT OCT 14 2017  
 
...MODERATE SNOW OVER PARTS OF THE CASCADES AND THE NORTHERN  
ROCKIES ...  
   
..HEAVY RAIN POSSIBLE OVER PARTS OF PACIFIC NORTHWEST COAST
 
 
UPPER-LEVEL ENERGY OVER PARTS OF THE NORTHEAST WILL MOVE OUT OVER  
THE WESTERN ATLANTIC OVERNIGHT THURSDAY. THE SYSTEM WILL PRODUCE  
LIGHT RAIN OVER PARTS OF THE NORTHEAST INTO THE MID-ATLANTIC THAT  
WILL END OVER THE NORTHEAST/NORTHERN MID-ATLANTIC BY LATE THURSDAY  
NIGHT. EARLY ON THURSDAY MORNING, ONSHORE FLOW FROM THE ATLANTIC  
WILL DEVELOP OVER PARTS OF THE NORTHERN MID-ATLANTIC THAT WILL  
MOVE INTO THE SOUTHERN MID-ATLANTIC BY THURSDAY EVENING AND  
CONTINUING INTO FRIDAY EVENING. LIGHT RAIN AND DRIZZLE WILL  
DEVELOP OVER PARTS OF THE MID-ATLANTIC ON THURSDAY CONTINUING INTO  
FRIDAY EVENING. IN ADDITION, UPPER-LEVEL ENERGY AND EASTERLY FLOW  
OFF THE ATLANTIC WILL AID IN PRODUCING SHOWERS AND THUNDERSTORMS  
OVER THE FLORIDA PENINSULA ON THURSDAY INTO FRIDAY.  
 
MEANWHILE, A FRONT OVER THE NORTHERN PLAINS INTO THE CENTRAL  
ROCKIES/GREAT BASIN WILL MOVE SLOWLY EASTWARD TO THE UPPER GREAT  
LAKE/MIDDLE MISSISSIPPI VALLEY INTO PARTS OF THE CENTRAL PLAINS  
AND SOUTHERN HIGH PLAINS BY FRIDAY EVENING. MOISTURE WILL POOL  
ALONG THE FRONT OVERNIGHT THURSDAY AIDING IN THE DEVELOPMENT OF  
SHOWERS AND THUNDERSTORMS OVER PARTS OF THE MIDDLE MISSISSIPPI  
VALLEY ON FRIDAY AFTERNOON INTO FRIDAY EVENING WITH LIGHT RAIN  
MOVING INTO THE UPPER GREAT LAKES BY FRIDAY EVENING.  
ADDITIONALLY, MOISTURE FROM THE ATLANTIC WILL MOVE INTO THE GREAT  
LAKES THROUGH LATE THURSDAY EVENING. LIGHT RAIN WILL DEVELOP OVER  
PARTS OF THE GREAT LAKES THURSDAY EVENING INTO FRIDAY MORNING.  
 
IN THE MEANTIME, ONSHORE FLOW WILL CONTINUE OVER THE PACIFIC  
NORTHWEST THROUGH FRIDAY EVENING. RAIN AND HIGHER ELEVATION SNOW  
WILL DEVELOP OVER THE NORTHWEST INTO THE NORTHERN INTERMOUNTAIN  
REGION THROUGH FRIDAY EVENING. SNOW WILL ALSO DEVELOP OVER PARTS  
OF THE NORTHERN ROCKIES THROUGH FRIDAY EVENING INTO SATURDAY.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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