157
FXUS01 KWBC 020801
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 AM EDT THU OCT 02 2025
VALID 12Z THU OCT 02 2025 - 12Z SAT OCT 04 2025
...THUNDERSTORMS AND HEAVY RAINFALL EXPECTED ALONG THE SOUTHEAST
ATLANTIC COAST THE NEXT SEVERAL DAYS WITH ISOLATED FLASH FLOODING
POSSIBLE...
...COOL AND UNSETTLED WEATHER PERSISTS ACROSS PORTIONS OF THE
GREAT BASIN, PACIFIC NORTHWEST, AND NORTHERN ROCKIES...
...UNSEASONABLY HOT WEATHER CONTINUES FOR MUCH OF THE PLAINS AND
MIDWEST HEADING INTO THE WEEKEND WITH RECORD CHALLENGING HIGH
TEMPERATURES LIKELY...
STRONG SURFACE HIGH PRESSURE WILL DESCEND SOUTHWARD FROM CANADA
AND SETTLE OVER THE NORTHEAST AND MID-ATLANTIC TODAY INTO FRIDAY,
BRINGING A MUCH COOLER AND FALL-LIKE AIRMASS TO MUCH OF THE
REGION. FARTHER SOUTH, A PROLONGED STRETCH OF EASTERLY, ONSHORE
FLOW AROUND THE SOUTHERN PERIPHERY OF THIS AREA OF HIGH PRESSURE
WILL LEAD TO SWELLS, HIGH SURF, DANGEROUS RIP CURRENTS, AND SOME
COASTAL FLOODING ALONG MUCH OF THE EAST COAST THE NEXT FEW DAYS.
THE PERSISTENT, MOIST, ONSHORE FLOW WILL ALSO BRING REPEATED
ROUNDS OF POTENTIALLY HEAVY SHOWERS AND THUNDERSTORMS TO THE
COASTLINES OF FLORIDA, GEORGIA AND POSSIBLY THE CAROLINAS THROUGH
THE END OF THE WEEK AND INTO THE WEEKEND. SHOWERS AND STORMS
CAPABLE OF PRODUCING INTENSE DOWNPOURS WILL BE MOST PREVALENT
ALONG EASTERN PORTIONS OF THE FLORIDA PENINSULA WHERE 1 TO 3
INCHES OF RAIN OR MORE IS POSSIBLE THROUGH SATURDAY. WHILE THE
OVERALL RISK IS MARGINAL, SOME LOCALIZED INSTANCES OF FLASH
FLOODING CAN'T BE RULED OUT, PARTICULARLY IN URBAN OR POOR
DRAINAGE AREAS.
UNSETTLED AND UNSEASONABLY COOL WEATHER WILL CONTINUE FOR PARTS OF
THE PACIFIC NORTHWEST, GREAT BASIN, NORTHERN ROCKIES, AND
INTERMOUNTAIN WEST THE NEXT FEW DAYS AS A POTENT UPPER-LEVEL
TROUGH SLOWLY DIGS ACROSS THE REGION. MOIST SOUTHWEST FLOW OUT
AHEAD OF THE DEEPENING TROUGH WILL BRING INCREASING SHOWER AND
THUNDERSTORM ACTIVITY STARTING LATER TODAY AND LASTING THROUGH
FRIDAY AND INTO THE DAY ON SATURDAY. ADDITIONALLY, THE COLD AIR
ALOFT ASSOCIATED WITH THE UPPER LEVEL TROUGH WILL SUPPORT A BIT OF
SNOW IN THE HIGHEST ELEVATIONS OF THE NORTHERN ROCKIES,
PARTICULARLY ON SATURDAY. IN THE LOWER ELEVATIONS, SOME OF THE
MORE INTENSE SHOWERS AND THUNDERSTORMS COULD CONTAIN PERIODS OF
HEAVIER RAINFALL. AS A RESULT, LOCALIZED FLASH FLOODING WILL BE
POSSIBLE, ESPECIALLY FROM THE SIERRA FOOTHILLS INTO THE GREAT
BASIN LATER TODAY INTO FRIDAY AND PORTIONS OF THE GREAT BASIN,
NORTHERN ROCKIES, AND INTERMOUNTAIN WEST FRIDAY INTO SATURDAY.
GIVEN THE PREVALENCE OF CLOUDS AND PRECIPITATION ASSOCIATED WITH
THE DIGGING UPPER-LEVEL TROUGH, HIGH TEMPERATURES WILL STAY ON THE
COOLER SIDE OF NORMAL BY ROUGHLY 10 TO 20 DEGREES ACROSS MUCH OF
THE WESTERN U.S. THROUGH THE END OF THE WEEK AND INTO THE WEEKEND.
DOWNSTREAM OF THE UPPER-LEVEL TROUGH OVER THE WESTERN U.S. IS AN
EXPANSIVE UPPER-LEVEL RIDGE THAT WILL FURTHER AMPLIFY OVER THE
CENTRAL AND LATER EASTERN U.S. THE NEXT FEW DAYS. THIS RIDGE OF
HIGH PRESSURE WILL CONTINUE TO SUPPORT AN EXTENDED PERIOD OF
UNSEASONABLY HOT WEATHER ACROSS THE PLAINS AND MIDWEST BEFORE
EXPANDING EASTWARD THROUGH THE END OF THE WEEK AND INTO THE
WEEKEND. THE HOTTEST WEATHER RELATIVE TO NORMAL WILL BE CONFINED
TO THE NORTHERN PLAINS AND UPPER MIDWEST, WHERE HIGH TEMPERATURES
WILL SOAR TO BETWEEN 10 AND 20 DEGREES ABOVE NORMAL TODAY, TO
BETWEEN 20 AND 30 DEGREES ABOVE NORMAL FRIDAY AND SATURDAY. HIGH
TEMPERATURES FOR MANY PLACES WILL LIKELY CHALLENGE RECORDS FRIDAY
AND SATURDAY AS HIGHS CLIMB WELL INTO THE UPPER 80S TO THE LOW/MID
90S. RECORD HIGH LOW TEMPERATURES SATURDAY MORNING ARE ALSO LIKELY
FOR MANY PLACES AS WELL GIVEN TEMPERATURES FORECAST TO ONLY BOTTOM
OUT IN THE 60S TO NEAR 70. DESPITE THE CALENDAR SAYING IT'S
OCTOBER, IT SURE WILL BE FEELING MUCH MORE SUMMER-LIKE THAN
FALL-LIKE THE NEXT FEW DAYS.
MILLER
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