538
FXUS01 KWBC 280754
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
353 AM EDT TUE OCT 28 2025
VALID 12Z TUE OCT 28 2025 - 12Z THU OCT 30 2025
...SHOWERS AND THUNDERSTORMS ALONG WITH SOME GUSTY COASTAL WINDS
FOR THE CAROLINAS AND SOUTHERN MID-ATLANTIC TUESDAY...
...STORM SYSTEM TO BRING WIDESPREAD SHOWERS AND THUNDERSTORMS FROM
THE MISSISSIPPI VALLEY TO THE APPALACHIANS/MID-ATLANTIC
TUESDAY-WEDNESDAY...
...MUCH COOLER, BELOW AVERAGE TEMPERATURES WILL CONTINUE TO
OVERSPREAD MUCH OF THE CENTRAL AND EASTERN U.S. INTO MID-WEEK...
...PACIFIC SYSTEM WILL BRING LOWER ELEVATION RAIN AND HIGHER
ELEVATION SNOW TO THE PACIFIC NORTHWEST TUESDAY...
SHOWERS AND A FEW THUNDERSTORMS WILL CONTINUE INTO TUESDAY FOR
PORTIONS OF THE CAROLINAS AND THE SOUTHERN MID-ATLANTIC AS A
COASTAL LOW PASSES BY THE REGION. SOME LOCALLY HEAVY RAINFALL WILL
BE POSSIBLE PARTICULARLY RIGHT ALONG THE OUTER BANKS. GUSTY WINDS
AND SOME MINOR TO MODERATE COASTAL FLOODING ARE ALSO EXPECTED.
MEANWHILE, TO THE WEST, AN UPPER-LEVEL TROUGH AND ACCOMPANYING
SURFACE COLD FRONT WILL INITIALLY BRING SHOWER AND THUNDERSTORMS
CHANCES TO THE UPPER MIDWEST SOUTHWARD THROUGH THE MISSOURI VALLEY
AND INTO PORTIONS OF THE ADJACENT PLAINS TUESDAY. THEN, INTO THE
OVERNIGHT HOURS, REINFORCING UPPER-ENERGY WILL DIG THE TROUGH
DEEPLY SOUTHWARD AND HELP TO ORGANIZE/REINFORCE A LOW
PRESSURE/FRONTAL SYSTEM IN THE MIDDLE/LOWER MISSISSIPPI VALLEY.
SHOWER AND THUNDERSTORM COVERAGE WILL EXPAND OVERNIGHT IN VICINITY
OF THE LOW AND THE TRAILING COLD FRONT, WITH SOME LOCALLY HEAVY
RAINFALL POSSIBLE PARTICULARLY ACROSS THE MID-SOUTH. THE SYSTEM
WILL CONTINUE EASTWARD WEDNESDAY WITH WIDESPREAD SHOWERS AND
THUNDERSTORMS SPREADING INTO THE OHIO AND TENNESSEE VALLEYS AND
CENTRAL/SOUTHERN APPALACHIANS THROUGH THE DAY, AND INTO THE
MID-ATLANTIC/CAROLINAS BY WEDNESDAY NIGHT. LOCALLY HEAVY RAINFALL
WILL REMAIN POSSIBLE, WITH AN ISOLATED RISK OF FLASH FLOODING,
PARTICULARLY IN THE MORE TERRAIN SENSITIVE AREAS OF THE UPPER
OHIO/TENNESSEE VALLEYS AND THE APPALACHIANS. A PRIOR FRONTAL
PASSAGE FOLLOWED BY THIS SECOND UPPER-LOW/FRONTAL PASSAGE WILL
KEEP TEMPERATURES COOL AND WELL BELOW AVERAGE FOR MUCH OF THE
EASTERN/CENTRAL U.S. WIDESPREAD HIGHS IN THE 50S AND 60S ARE
EXPECTED FOR ALL BUT THE GULF COAST/FLORIDA TUESDAY. COOLER
TEMPERATURES IN THE 60S TO 70S WILL THEN REACH THE GULF COAST BY
WEDNESDAY, A CHANGE PARTICULARLY NOTABLE ACROSS SOUTH TEXAS WHERE
HIGHS INTO THE 90S TO NEAR 100 OVER THE PAST FEW DAYS HAVE BEEN
AROUND DAILY RECORD TYING/BREAKING LEVELS.
ANOTHER PACIFIC STORM SYSTEM WILL BRING LOWER ELEVATION
COASTAL/VALLEY RAIN AND HIGHER ELEVATION SNOW TO THE PACIFIC
NORTHWEST TUESDAY. SOME MODERATE RAIN AND HIGHER ELEVATION SNOW
AMOUNTS WILL BE POSSIBLE, BUT SHOULD REMAIN LIGHTER THAN THIS PAST
WEEKEND'S ATMOSPHERIC RIVER ACTIVITY. THE SYSTEM WILL ALSO DEPART
THE REGION RATHER QUICKLY WITH PRECIPIATION CHANCES TAPERING OFF
BY EARLY WEDNESDAY. FORECAST HIGH TEMPERATURES WILL REMAIN BELOW
AVERAGE FOR MUCH OF THE GREAT BASIN/ROCKIES TUESDAY AS AN
UPPER-LEVEL TROUGH PASSES OVERHEAD, WITH HIGHS MAINLY IN THE 40S
AND 50S. AN UPPER-RIDGE WILL EXPAND OVER THE WESTERN U.S. AS THE
UPPER-TROUGH DEPARTS TO THE EAST, WITH ABOVE AVERAGE TEMPERATURES
FOR MOST LOCATIONS BY WEDNESDAY. HIGHS IN THE 50S AND 60S WILL BE
COMMON FOR THE PACIFIC NORTHWEST AND INTERIOR WEST, WITH HIGHS
INTO THE 70S AND 80S FOR MUCH OF CALIFORNIA. EVEN HOTTER
TEMPERATURES INTO THE 90S ARE EXPECTED FOR THE DESERT SOUTHWEST
AND PARTS OF SOUTHERN CALIFORNIA, WHERE HEAT ADVISORIES HAVE BEEN
ISSUED.
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