924  
FXUS01 KWBC 270728  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
327 AM EDT FRI JUN 27 2025  
 
VALID 12Z FRI JUN 27 2025 - 12Z SUN JUN 29 2025  
 
...THERE ARE HEAT ADVISORIES ACROSS MUCH OF THE OHIO/TENNESSEE  
VALLEYS AND MIDDLE /LOWER MISSISSIPPI VALLEY...  
 
...THERE IS A SLIGHT RISK OF EXCESSIVE RAINFALL OVER PARTS OF THE  
CENTRAL APPALACHIANS AND NORTHERN MID-ATLANTIC ON FRIDAY...  
 
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF  
THE NORTHERN/CENTRAL PLAINS AND GREAT LAKES ON FRIDAY AND THE  
UPPER MISSISSIPPI VALLEY AND NORTHERN/CENTRAL PLAINS ON SATURDAY...  
 
UPPER-LEVEL RIDGING WEAKENS FROM THE OHIO VALLEY TO THE SOUTHEAST  
ON FRIDAY, RESULTING IN A REDUCED AREA OF HEAT ADVISORIES OVER THE  
EAST. THE MOST EXTREME HEAT IS EXPECTED TO SUBSIDE TO TEMPERATURES  
MORE TYPICAL OF LATE JUNE BY FRIDAY NIGHT AND REMAIN SO THROUGHOUT  
THIS UPCOMING WEEKEND. FOR SATURDAY AND SUNDAY, HIGH TEMPERATURES  
IN THE 80S TO LOWER 90S ARE EXPECTED ACROSS THE REGION. THIS HEAT  
LEVEL CAN BE DANGEROUS TO ANYONE WITHOUT EFFECTIVE COOLING AND/OR  
ADEQUATE HYDRATION, ESPECIALLY THOSE ENGAGING IN LENGTHY OUTDOOR  
ACTIVITIES. HEAT-RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING  
EXTREME HEAT. WEAR LIGHTWEIGHT AND LOOSE-FITTING CLOTHING. TAKE  
ACTION WHEN YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE.  
 
ADDITIONALLY, A WAVE OF LOW PRESSURE OVER THE UPPER MIDWEST ON  
FRIDAY WILL MOVE EASTWARD TO THE NORTHEAST COAST BY SUNDAY  
MORNING. ON FRIDAY, A SECOND WAVE MOVES FROM THE NORTHERN HIGH  
PLAINS TO THE UPPER MISSISSIPPI VALLEY BY SUNDAY. WITH THE  
NORTHERN HIGH PLAINS LOW, SHOWERS AND SEVERE THUNDERSTORMS WILL  
DEVELOP ALONG AND AHEAD OF THE ASSOCIATED FRONT OVER PARTS OF THE  
NORTHERN/CENTRAL PLAINS. THEREFORE, THE SPC HAS ISSUED A SLIGHT  
RISK (LEVEL 2/5) OF SEVERE OVER PARTS OF THE NORTHERN/CENTRAL  
PLAINS THROUGH SATURDAY MORNING. THE HAZARDS ASSOCIATED WITH THESE  
THUNDERSTORMS ARE FREQUENT LIGHTNING, SEVERE THUNDERSTORM WIND  
GUSTS, HAIL, AND A FEW TORNADOES. HOWEVER, THERE WILL BE AN  
INCREASED THREAT OF SEVERE THUNDERSTORM WIND GUSTS OF 65 KNOTS OR  
GREATER AND HAIL TWO INCHES OR GREATER OVER THE AREA.  
 
IN ADDITION, THE WAVE OF LOW PRESSURE OVER PART OF THE GREAT LAKES  
WILL PRODUCE SHOWERS AND SEVERE THUNDERSTORMS. THEREFORE, THE SPC  
HAS ISSUED A SLIGHT RISK (LEVEL 2/5) OF SEVERE OVER PARTS OF THE  
GREAT LAKES THROUGH SATURDAY MORNING. THE HAZARDS ASSOCIATED WITH  
THESE THUNDERSTORMS ARE FREQUENT LIGHTNING, SEVERE THUNDERSTORM  
WIND GUSTS, HAIL, AND A FEW TORNADOES.  
 
ANOTHER AREA OF SHOWERS AND THUNDERSTORMS WILL DEVELOP HEAVY RAIN  
OVER PARTS OF THE CENTRAL APPALACHIANS AND NORTHERN MID-ATLANTIC.  
THEREFORE, THE WPC HAS ISSUED A SLIGHT RISK (LEVEL 2/4) OF  
EXCESSIVE RAINFALL OVER PARTS OF THE CENTRAL APPALACHIANS AND  
NORTHERN MID-ATLANTIC THROUGH SATURDAY MORNING. THE ASSOCIATED  
HEAVY RAIN WILL CREATE MAINLY LOCALIZED AREAS OF FLASH FLOODING,  
WITH URBAN AREAS, ROADS, SMALL STREAMS, AND LOW-LYING AREAS THE  
MOST VULNERABLE.  
 
MOREOVER, SHOWERS AND THUNDERSTORMS WILL DEVELOP ON FRIDAY OVER  
PARTS OF THE OHIO/TENNESSEE VALLEYS, THE CENTRAL GULF COAST, AND  
THE SOUTHEAST.  
 
ON SATURDAY, A FRONT MOVING ACROSS THE NORTHERN PLAINS AND UPPER  
MISSISSIPPI VALLEY WILL PRODUCE SHOWERS AND SEVERE THUNDERSTORMS  
OVER PARTS OF THE UPPER MISSISSIPPI VALLEY AND THE NORTHERN  
PLAINS. THEREFORE, THE SPC HAS ISSUED A SLIGHT RISK (LEVEL 2/5) OF  
SEVERE THUNDERSTORMS OVER PARTS OF THE UPPER MISSISSIPPI VALLEY  
AND THE NORTHERN PLAINS FROM SATURDAY THROUGH SUNDAY MORNING. THE  
HAZARDS ASSOCIATED WITH THESE THUNDERSTORMS ARE FREQUENT  
LIGHTNING, SEVERE THUNDERSTORM WIND GUSTS, HAIL, AND A FEW  
TORNADOES.  
 
FURTHERMORE, ON SATURDAY, SHOWERS AND THUNDERSTORMS WILL DEVELOP  
OVER PARTS OF THE LOWER GREAT LAKES TO THE NORTHEAST AS A FRONT  
MOVES ACROSS THE AREA. FURTHERMORE, FROM THE OHIO VALLEY SOUTHWARD  
TO THE GULF COAST, DAYTIME HEATING AND AMPLE MOISTURE WILL PRODUCE  
SHOWERS AND THUNDERSTORMS OVER THE REGION.  
 
MEANWHILE, UPPER-LEVEL IMPULSES WILL PRODUCE LIGHT RAIN FROM  
FRIDAY TO SATURDAY EVENING ALONG THE U.S./CANADIAN BORDER FROM  
WASHINGTON STATE TO MONTANA.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  
 

 
 
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