540  
FXUS01 KWBC 080718  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
318 AM EDT SAT SEP 08 2018  
 
VALID 12Z SAT SEP 08 2018 - 12Z MON SEP 10 2018  
 
...HEAVY RAIN POSSIBLE FROM PARTS OF THE OHIO VALLEY INTO PARTS OF  
THE LOWER GREAT LAKES...  
 
...HEAVY RAIN POSSIBLE FOR PARTS OF THE LOWER RIO GRANDE VALLEY  
AND PARTS OF THE TENNESSEE/LOWER MISSISSIPPI VALLEYS...  
 
GORDON HAS BECOME AN EXTRATROPICAL LOW THAT WILL MOVE  
NORTHEASTWARD TO PARTS OF THE OHIO VALLEY BY SUNDAY NIGHT INTO  
MONDAY. THE SYSTEM WILL AID IN PRODUCING SHOWERS AND  
THUNDERSTORMS WITH HEAVY RAIN AT TIMES OVER PARTS OF THE MIDDLE  
MISSISSIPPI AND OHIO VALLEYS THAT WILL MOVE NORTHEASTWARD  
EXTENDING FROM PARTS OF THE OHIO VALLEY TO PARTS OF THE NORTHERN  
MID-ATLANTIC BY SUNDAY EVENING INTO MONDAY. SHOWERS AND  
THUNDERSTORMS WILL ALSO DEVELOP ALONG THE ASSOCIATED FRONT FROM  
PARTS OF THE MIDDLE/LOWER MISSISSIPPI VALLEY INTO PARTS OF THE  
SOUTHERN PLAINS THAT WILL MOVE EASTWARD TO THE OHIO/TENNESSEE  
VALLEYS INTO PARTS OF THE LOWER MISSISSIPPI VALLEY AND THE WESTERN  
GULF COAST BY SUNDAY EVENING. ADDITIONALLY, A QUASI-STATIONARY  
FRONT EXTENDING FROM PARTS OF THE OHIO VALLEY EASTWARD TO THE  
MID-ATLANTIC COAST WILL ALSO TRIGGER SHOWERS AND THUNDERSTORM OVER  
THE REGION THROUGH SUNDAY EVENING, TOO. FURTHERMORE, TROPICAL  
MOISTURE AND DAYTIME HEATING WILL AID IN PRODUCING SHOWERS AND  
THUNDERSTORMS OVER PARTS OF THE SOUTHEAST/SOUTHERN MID-ATLANTIC  
THROUGH SUNDAY EVENING INTO MONDAY.  
 
MEANWHILE, A FRONT OVER PARTS OF THE NORTHERN ROCKIES INTO THE  
GREAT BASIN WILL SLOWLY MOVE EASTWARD TO THE NORTHERN PLAINS BY  
SUNDAY EVENING. SHOWERS AND THUNDERSTORMS WILL DEVELOP ALONG AND  
NEAR THE BOUNDARY OVER PARTS OF THE NORTHERN PLAINS INTO THE  
NORTHERN ROCKIES THAT WILL MOVE EASTWARD INTO PARTS OF THE  
NORTHERN/CENTRAL PLAINS BY SUNDAY EVENING. IN ADDITION, WEAK  
ONSHORE FLOW WILL AID IN PRODUCING LIGHT RAIN OVER PARTS OF THE  
PACIFIC NORTHWEST THROUGH SUNDAY EVENING.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab HPC Page Main Text Page