148
FXUS01 KWBC 082001
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 PM EDT SAT AUG 08 2026
VALID 00Z SUN AUG 09 2026 - 00Z TUE AUG 11 2026
...HEAT TO PERSIST ACROSS MUCH OF THE CONUS, WITH RECORD HIGHS
POSSIBLE ACROSS PORTIONS OF THE WEST AND CENTRAL ROCKIES/ PLAINS...
...MULTIPLE ROUNDS OF STRONG TO SEVERE THUNDERSTORMS EXPECTED FROM
THE PLAINS TO THE GREAT LAKES, NORTHEAST, AND MID-ATLANTIC...
...HEAVY RAINFALL AND FLASH FLOODING POSSIBLE ACROSS PORTIONS OF
THE SOUTHERN GREAT LAKES AND UPPER OHIO VALLEY...
A BROAD UPPER RIDGE WILL EXTEND ACROSS MUCH OF THE SOUTHERN CONUS
THROUGH EARLY NEXT WEEK, WITH A BREAK IN THE RIDGE NEAR THE LOWER
MISSISSIPPI VALLEY. THIS PATTERN WILL SUPPORT ABOVE-NORMAL
TEMPERATURES ACROSS MUCH OF THE CONUS, WITH THE GREATEST
TEMPERATURE ANOMALIES EXTENDING FROM CALIFORNIA AND THE NORTHERN
INTERMOUNTAIN WEST EASTWARD TO THE MID MISSISSIPPI VALLEY.
RECORD-BREAKING HIGHS AND VERY WARM OVERNIGHT LOWS ARE EXPECTED
ACROSS PORTIONS OF THE SOUTHWEST, CENTRAL ROCKIES, AND HIGH
PLAINS. MEANWHILE, A SERIES OF DISTURBANCES LIFTING OUT OF THE
WESTERN GULF AND ACROSS THE EASTERN PORTION OF THE RIDGE WILL
SUPPORT PERIODS OF SHOWERS AND THUNDERSTORMS FROM PARTS OF THE
SOUTHERN PLAINS AND WESTERN GULF COAST INTO THE SOUTHEAST.
MONSOONAL CONVECTION WILL ALSO PROVIDE SOME LOCALIZED RELIEF FROM
THE HEAT ACROSS THE SOUTHWEST AND GREAT BASIN, BUT THESE STORMS
WILL POSE A THREAT FOR HEAVY RAINFALL AND FLASH FLOODING. FARTHER
NORTH, DRIER CONDITIONS WILL PERSIST FROM PARTS OF THE CASCADES
EASTWARD TO THE NORTHERN HIGH PLAINS, SUPPORTING CONTINUED
ELEVATED FIRE WEATHER CONCERNS.
MEANWHILE, FARTHER NORTH, A SERIES OF UPPER-LEVEL DISTURBANCES
WILL GENERATE ADDITIONAL PERIODS OF SHOWERS AND THUNDERSTORMS FROM
THE NORTHERN PLAINS THROUGH THE GREAT LAKES, NORTHEAST, AND
MID-ATLANTIC. SOME OF THESE STORMS ARE EXPECTED TO BECOME STRONG
TO SEVERE. ON SUNDAY, A CONCENTRATED AREA OF DAMAGING WINDS AND
HAIL IS EXPECTED ACROSS MUCH OF SOUTH DAKOTA, WHILE SCATTERED
DAMAGING WIND GUSTS WILL ALSO BE POSSIBLE FROM EASTERN IOWA ACROSS
NORTHERN ILLINOIS AND INDIANA. ON MONDAY, THUNDERSTORMS CAPABLE OF
PRODUCING SEVERE WIND GUSTS WILL BE POSSIBLE FROM PARTS OF
NORTHERN ILLINOIS EASTWARD INTO WESTERN PENNSYLVANIA, WITH
ISOLATED SEVERE GUSTS ALSO POSSIBLE FROM PORTIONS OF THE CENTRAL
AND NORTHERN PLAINS INTO THE MIDWEST.
IN ADDITION TO DAMAGING WINDS AND HAIL, SOME OF THESE
THUNDERSTORMS WILL PRODUCE LOCALLY HEAVY RAINFALL AND FLASH
FLOODING. THE GREATEST POTENTIAL FOR HEAVY RAINFALL AND FLASH
FLOODING WILL BE FOCUSED ACROSS THE SOUTHERN GREAT LAKES AND UPPER
OHIO VALLEY, WHERE MULTIPLE ROUNDS OF CONVECTION COULD PRODUCE
LOCALLY HEAVY RAINFALL AND EXACERBATE FLASH FLOOD CONCERNS.
SHOWERS AND THUNDERSTORMS WILL REMAIN POSSIBLE INTO EARLY TUESDAY,
PARTICULARLY ACROSS THE NORTHEAST AND MID-ATLANTIC.
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