877
FXUS01 KWBC 271949
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
349 PM EDT FRI JUN 27 2025
VALID 00Z SAT JUN 28 2025 - 00Z MON JUN 30 2025
...THERE ARE HEAT ADVISORIES AND A FEW EXTREME HEAT WARNINGS
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 SATURDAY AND
SUNDAY...
WITH THE RIDGE ALOFT WEAKENING THE SPATIAL EXTENT OF THE EXCESSIVE
HEAT HAS SHRUNK DOWN TO THE MIDDLE/LOWER MISSISSIPPI VALLEY AND
THE OHIO/TENNESSEE VALLEYS AND WILL CONTINUE REDUCING INTO THE
WEEKEND. 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.
AFTERNOON HIGH TEMPERATURES ARE EXPECTED TO RETURN TO SEASONAL
NORMAL FOR LATE JUNE.
FOR SATURDAY AND SUNDAY, HIGH TEMPERATURES IN THE 80S TO LOWER 90S
ARE FORECAST FOR MUCH OF THE EASTERN HALF OF THE COUNTRY.
MEANWHILE A SURFACE LOW PRESSURE SYSTEM WILL TRACK FROM THE UPPER
MIDWEST TO THE NORTHEAST BY SUNDAY WITH A SECONDARY WAVE TRACKING
FROM THE NORTHERN HIGH PLAINS TO THE UPPER MISSISSIPPI VALLEY.
SHOWERS AND SEVERE THUNDERSTORMS WILL DEVELOP ALONG AND AHEAD OF
THE ASSOCIATED FRONT OVER PARTS OF THE NORTHERN/CENTRAL PLAINS.
SPC HAS ISSUED A SLIGHT RISK (LEVEL 2/5) OF SEVERE WEATHER FOR
PORTIONS OF THE NORTHERN/CENTRAL PLAINS INTO THE UPPER MISSISSIPPI
VALLEY THROUGH SUNDAY 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.
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. ELSEWHERE,
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. 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. FARTHER EAST
SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER PARTS OF THE LOWER
GREAT LAKES TO THE NORTHEAST AS THE FRONT ADVANCES THROUGH THE
AREA. THE OHIO VALLEY SOUTHWARD TO THE GULF COAST, DAYTIME HEATING
AND AMPLE MOISTURE WILL PRODUCE SHOWERS AND THUNDERSTORMS OVER THE
REGION. UPPER-LEVEL IMPULSES ARE FORECAST TO PRODUCE LIGHT RAIN
THROUGH SATURDAY EVENING ALONG THE INTERNATIONAL BORDER FROM
WASHINGTON TO MONTANA.
CAMPBELL/ZIEGENFELDER
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page