624  
FXUS01 KWBC 170753  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
352 AM EDT WED OCT 17 2018  
 
VALID 12Z WED OCT 17 2018 - 12Z FRI OCT 19 2018  
   
..HEAVY RAIN POSSIBLE OVER PARTS OF THE SOUTHERN PLAINS
 
 
   
..SNOW POSSIBLE OVER PARTS OF THE CENTRAL/SOUTHERN ROCKIES
 
 
...TEMPERATURES WILL BE 20 TO 30 DEGREES BELOW AVERAGE OVER THE  
SOUTHERN PLAINS...  
 
A FRONT EXTENDING OVER PARTS OF THE SOUTHEAST INTO THE GULF OF  
MEXICO WILL SLOWLY MOVE SOUTHWARD TO THE FLORIDA PENINSULA BY  
THURSDAY EVENING. SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER  
PARTS OF THE SOUTHERN MID-ATLANTIC INTO THE SOUTHEAST THAT WILL  
MOVE SOUTHWARD OVER THE FLORIDA PENINSULA BY THURSDAY MORNING INTO  
EVENING. RAIN WILL DEVELOP OVER PARTS OF THE NORTHERN  
MID-ATLANTIC THAT WILL MOVE OUT OVER THE ATLANTIC BY WEDNESDAY  
EVENING. IN ADDITION, MOISTURE FLOWING NORTHWARD OUT OF THE GULF  
OF MEXICO WILL OVERRUN THE BOUNDARY PRODUCING SHOWERS AND  
THUNDERSTORMS OVER PARTS OF THE WESTERN/CENTRAL GULF COAST THAT  
WILL END OVER THE CENTRAL GULF COAST BY THURSDAY EVENING.  
OVERNIGHT WEDNESDAY, SHOWERS AND THUNDERSTORMS WILL MOVE  
NORTHWESTWARD INTO PARTS OF THE SOUTHERN PLAINS INTO THURSDAY  
EVENING.  
 
MEANWHILE, MOISTURE WILL MOVE NORTHWARD OVER THE SOUTHERN PLAINS  
AND CLOCKWISE CIRCULATION AROUND HIGH PRESSURE THE CENTRAL PLAINS  
THAT WILL MOVE EASTWARD TO THE OHIO VALLEY BY THURSDAY. THE  
MOISTURE AND CIRCULATION WILL AID IN PRODUCING RAIN OVER THE  
SOUTHERN HIGH PLAINS THROUGH THURSDAY EVENING. ADDITIONALLY, AN  
UPPER-LEVEL LOW OVER THE SOUTHWEST WILL SLOWLY WEAKEN AND MOVE  
NORTHEASTWARD OVER PARTS OF THE GREAT BASIN/CENTRAL ROCKIES BY  
THURSDAY. THE ENERGY WILL AID IN PRODUCING VALLEY RAIN AND  
MOUNTAIN SNOW OVER PARTS OF THE GREAT BASIN/SOUTHWEST AND THE  
CENTRAL/SOUTHERN ROCKIES THROUGH THURSDAY EVENING.  
 
ELSEWHERE, UPPER-LEVEL ENERGY OVER THE GREAT LAKES WILL MOVE  
EASTWARD OFF THE NORTHEAST COAST BY OVERNIGHT THURSDAY. THE  
ENERGY WILL PRODUCE RAIN AND SNOW OVER PARTS OF THE GREAT LAKES  
INTO PARTS OF THE NORTHEAST THAT WILL END OVER THE UPPER GREAT  
LAKES BY LATE WEDNESDAY EVENING AND OVER THE NORTHEAST BY THURSDAY  
EVENING.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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