756  
FXUS01 KWBC 081958  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
357 PM EDT TUE MAY 08 2018  
 
VALID 00Z WED MAY 09 2018 - 00Z FRI MAY 11 2018  
 
...SHOWERS AND THUNDERSTORMS POSSIBLE OVER PARTS OF THE  
UPPER/MIDDLE MISSISSIPPI VALLEY...  
 
...EMBEDDED THUNDERSTORMS POSSIBLE OVER INTERIOR PARTS OF PACIFIC  
NORTHWEST...  
 
UPPER-LEVEL ENERGY OVER THE NORTHERN/CENTRAL PLAINS WILL SLOWLY  
ADVANCE EASTWARD TO THE LOWER GREAT LAKES BY THURSDAY MORNING.  
THE ENERGY WILL AID IN PRODUCING SHOWERS AND THUNDERSTORMS OVER  
PARTS OF THE NORTHERN PLAINS INTO THE UPPER/MIDDLE MISSISSIPPI  
VALLEY AND PARTS OF THE UPPER GREAT LAKES THAT WILL MOVE EASTWARD  
TO THE LOWER GREAT LAKES/OHIO VALLEY/CENTRAL APPALACHIANS  
EXTENDING WESTWARD INTO PARTS OF THE CENTRAL PLAINS BY THURSDAY.  
 
MEANWHILE, A FRONT WILL MOVE ONSHORE OVER THE PACIFIC NORTHWEST  
OVERNIGHT TUESDAY CONTINUING TO MOVE INLAND TO THE NORTHERN  
ROCKIES/NORTHERN HIGH PLAINS SOUTHWESTWARD TO THE GREAT BASIN BY  
THURSDAY, TOO. THE SYSTEM WILL PRODUCE RAIN OVER PARTS OF THE  
PACIFIC NORTHWEST THAT EXPAND EASTWARD INTO THE NORTHERN  
INTERMOUNTAIN REGION BY WEDNESDAY MORNING. THE RAIN WILL CONTINUE  
EXPANDING EASTWARD WITH EMBEDDED THUNDERSTORMS OVER PARTS OF THE  
NORTHERN ROCKIES BY WEDNESDAY EVENING MOVING INTO PARTS OF THE  
NORTHERN PLAINS BY THURSDAY.  
 
ELSEWHERE, AN UPPER-LEVEL LOW OVER THE MID-ATLANTIC WILL AID IN  
PRODUCING DIURNAL SHOWERS AND THUNDERSTORMS OVER PARTS OF THE  
APPALACHIANS THROUGH TUESDAY EVENING. THE ENERGY WILL ALSO HELP  
PRODUCE SHOWERS AND THUNDERSTORMS OVER PARTS OF SOUTHERN  
MID-ATLANTIC COAST BY WEDNESDAY MORNING ENDING BY WEDNESDAY  
EVENING. ADDITIONALLY, THE ENERGY WILL AID IN PRODUCING RAIN OVER  
PARTS OF SOUTHERN NEW ENGLAND COAST OVERNIGHT WEDNESDAY INTO  
THURSDAY.  
 
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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