761
FXUS01 KWBC 250600
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
200 AM EDT MON AUG 25 2025
VALID 12Z MON AUG 25 2025 - 12Z WED AUG 27 2025
...EXCESSIVE RAINFALL IS A THREAT ACROSS PORTIONS OF THE SOUTHWEST
THROUGH TUESDAY...
...FLASH FLOODING A CONCERN ACROSS PORTIONS OF COLORADO, KANSAS,
OKLAHOMA, AND ARKANSAS THROUGH WEDNESDAY...
...THE PACIFIC NORTHWEST WILL REMAIN HOT MONDAY AND TUESDAY; COOL
CONDITIONS SPREAD THROUGH THE EAST...
THROUGH WEDNESDAY, MONSOONAL MOISTURE, DIURNAL HEATING, AND
UPPER-LEVEL IMPULSES WILL PRODUCE SHOWERS AND THUNDERSTORMS OVER
PORTIONS OF THE WEST. SLIGHT RISKS OF EXCESSIVE RAINFALL/FLASH
FLOODING EXIST ACROSS PORTIONS OF THE SOUTHWEST MONDAY AND TUESDAY
AND IDAHO/SOUTHWEST MONTANA ON WEDNESDAY. ELEVATED CONVECTION
WITH HEAVY RAINFALL NORTH OF A FRONT WILL DEVELOP AT TIMES OVER
PARTS OF COLORADO, OKLAHOMA, KANSAS, AND ARKANSAS THROUGH
WEDNESDAY; A SLIGHT RISK OF EXCESSIVE RAINFALL IS DEPICTED OVER
PORTIONS OF THESE AREAS. FOR THE WEST, THE MAIN CONCERN IS
FLOODING OF DRY WASHES/ARROYOS, URBAN AREAS, BURN SCARS, AND BOX
CANYONS. FOR AREAS EAST OF THE ROCKIES, HOURLY AMOUNTS TO 2.5"
WOULD BE PROBLEMATIC IN URBAN AREAS. SWATHS OF HEAVY RAIN EACH
DAY ARE EXPECTED TO INCREASE SOIL SATURATION OVER TIME, MAKING
AREAS INCREASINGLY SENSITIVE TO FURTHER HEAVY RAINFALL.
MEANWHILE, WARM CORE RIDGING ACROSS THE NORTHWEST WILL AID AND
ABET A HEAT WAVE ACROSS NORTHWEST CONTINUING ON MONDAY AND
TUESDAY, BEFORE LOSING ITS GRIP ON THE REGION ON WEDNESDAY.
RECORD HIGHS ARE EXPECTED TO BE THREATENING IN MORE LOCATIONS
ACROSS WASHINGTON AND OREGON ON MONDAY THAN TUESDAY; TEMPERATURES
WILL RISE TO NEAR 100F. THIS HEAT WILL BE DANGEROUS, POSING A
THREAT TO ANYONE WITHOUT EFFECTIVE COOLING AND ADEQUATE HYDRATION.
NUMEROUS DAILY HIGH TEMPERATURE RECORDS ARE LIKELY TO BE BROKEN.
FOR MANY AREAS, THERE WILL BE LITTLE NIGHTTIME RELIEF FROM THE
EXTREME HEAT, WITH OVERNIGHT LOWS REMAINING WELL ABOVE NORMAL.
EXTREME HEAT IS DANGEROUS EVEN AT NIGHT WHEN TEMPERATURES DO NOT
COOL DOWN. STAY INFORMED AND TAKE STEPS TO PROTECT YOURSELF FROM
HEAT-RELATED ILLNESSES. FOR INFORMATION ON STAYING COOL AND SAFE,
VISIT WWW.WEATHER.GOV/SAFETY/HEAT. AS TEMPERATURES RISE, LIMIT
OUTDOOR ACTIVITY, STAY HYDRATED, AND ENSURE ACCESS TO
AIR-CONDITIONING AND OTHER COOLING AREAS.
MEANWHILE, EAST OF THE ROCKIES AND NORTH OF THE GULF COAST, LARGE
SWATHS OF BELOW AVERAGE TEMPERATURES ARE EXPECTED, WITH
TEMPERATURES MORE REMINISCENT OF EARLY FALL THAN LATE SUMMER UNDER
THE AEGIS OF STRONG HIGH PRESSURE (BY AUGUST STANDARDS). COOL TO
COLD CONDITIONS ARE EXPECTED OVERNIGHT FROM THE GULF COAST
NORTHWARD, WITH RESPLENDENT SUNSHINE DURING THE DAY OVER PORTIONS
OF THE MIDWEST, APPALACHIANS, AND MUCH OF THE EAST. RECORD LOWS
WILL BE THREATENED ON TUESDAY AT INTERNATIONAL FALLS, MINNESOTA
(CLOSE TO FREEZING) AND WELL AS PORTIONS OF THE MIDWEST WHERE 40S
AND 50S ARE FORECAST. ON WEDNESDAY, THE RECORD LOW TERRITORY
EXPANDS ACROSS THE MIDWEST, TOWARDS THE SOUTHERN GREAT LAKES AND
INTO THE SOUTHEAST, ENCOMPASSING A BROADER AREA OF 40S AND 50S.
IN AREAS WITH RAIN, SUCH AS KANSAS/OKLAHOMA ON MONDAY, THE
ARKLATEX AND RED RIVER VALLEY OF THE SOUTH ON TUESDAY, AND KANSAS
ON WEDNESDAY, HIGHS MAY ONLY REACH INTO THE 60S AND 70S
THREATENING RECORD COLD MAXIMA FOR THE DATES. LAKE EFFECT AND
LAKE ENHANCED SHOWERS AND THUNDERSTORMS ARE EXPECTED MONDAY
THROUGH WEDNESDAY, WITH CONVECTIVE COVERAGE NEAR THE GREAT LAKES
DECREASING NOTICEABLY LATE ON TUESDAY AND DURING THE DAY WEDNESDAY.
ROTH
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