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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