475
FXUS01 KWBC 081955
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
353 PM EDT WED JUL 08 2026
VALID 00Z THU JUL 09 2026 - 00Z SAT JUL 11 2026
...SEVERE WEATHER OVER THE PLAINS TO THE UPPER MIDWEST AND OHIO
VALLEY...
...DANGEROUSLY HOT TEMPERATURES CONTINUE FOR THE SOUTHWEST AND
SOUTHEAST...
...LOCALLY HEAVY RAINFALL AND FLASH FLOODING POSSIBLE FOR MANY
AREAS EAST OF THE ROCKIES...
A DECIDEDLY SUMMERTIME PATTERN WILL HOLD OVER MUCH OF THE LOWER 48
OVER THE NEXT COUPLE OF DAYS. A FRONTAL BOUNDARY FROM THE PACIFIC
NORTHWEST TO THE GREAT LAKES WILL DELINEATE A LINE BETWEEN
WARM/HOT AND HUMID AIR TO THE SOUTH VERSUS MILDER AIR TO THE NORTH
(MOSTLY OVER CANADA). ALONG AND AHEAD OF THIS FRONT, SHOWERS AND
THUNDERSTORMS WILL ORGANIZE AND MAY PRODUCE BOTH SEVERE WEATHER
AND FLASH FLOODING DUE TO LOCALLY HEAVY RAINFALL THIS
AFTERNOON/EVENING. IN ADDITION, ANOTHER FRONTAL BOUNDARY OVER THE
SOUTHERN PLAINS THROUGH THE TENNESSEE VALLEY TO THE SOUTHERN
MID-ATLANTIC WILL ALSO FAVOR SHOWERS AND THUNDERSTORMS WITH
LOCALLY HEAVY RAINFALL. THE NORTHERN FRONT WILL PUSH SOUTHWARD AND
EASTWARD TONIGHT INTO THURSDAY, MOVING THE THREAT INTO THE MIDWEST
AND OHIO VALLEY. THE WAVY FRONT OVER THE TENNESSEE VALLEY MAY LIFT
JUST ENOUGH NORTHWARD TO BRING MOISTURE INTO THE MID-ATLANTIC
TOMORROW, WITH A CHANCE OF LOCALLY HEAVY RAIN AND FLASH FLOODING
FOR AREAS OF NORTHERN VIRGINIA THROUGH MARYLAND INTO SOUTHEASTERN
PENNSYLVANIA AND SOUTHERN NEW JERSEY. THOUGH BOTH THE STORM
PREDICTION CENTER AND THE WEATHER PREDICTION CENTER INDICATE
SLIGHT RISK AREAS, SOME STORMS MAY BE RATHER SEVERE FOR PARTICULAR
LOCATIONS GIVEN THE HUMID AIR MASS. FURTHERMORE, AREAS THAT SEE
PERSISTENT HEAVY RAINFALL MAY SEE LOCALLY HIGH AMOUNTS OF SEVERAL
INCHES WITH IMPACTS THAT COULD BE EXACERBATED OVER URBAN AREAS.
MOST OF THE LOWER 48 WILL BE UNDER THE INFLUENCE OF A HEAT DOME,
BROKEN ACROSS THE SOUTHERN TIER. THIS WILL FAVOR NEAR TO ABOVE
NORMAL TEMPERATURES AT WHAT IS NEAR OR NEARING THE HOTTEST TIME OF
THE YEAR. FOR PARTS OF THE SOUTHWEST, THIS WILL LEAD TO
TEMPERATURES WELL INTO THE 100S FOR THE LOWER ELEVATIONS AND INTO
THE 110S FOR THE TYPICALLY HOTTER LOCATIONS. OVER THE SOUTHEAST,
UPPER 90S ARE FORECAST FOR PARTS OF FLORIDA WHICH WILL SEE LITTLE
RELIEF FROM AFTERNOON THUNDERSTORMS DUE TO THE SUPPRESSION OF SUCH
DEVELOPMENT FROM THE HEAT DOME. OVERNIGHT LOWS WILL ONLY DROP INTO
THE MID/UPPER 70S TO LOW 80S, LEAVING LITTLE TIME TO COOL OFF AT
NIGHT. THE COMBINATION OF THE HEAT, HUMIDITY, AND DURATION LEADS
TO MAJOR TO EXTREME LEVELS OF HEATRISK OVER THE SOUTHEAST/FLORIDA
-- ANYONE WITHOUT ADEQUATE ACCESS TO COOLING/HYDRATION WOULD BE
SUSCEPTIBLE TO HEAT-RELATED ILLNESS.
FRACASSO
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