587
FXUS01 KWBC 100749
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
249 AM EST SUN NOV 10 2024
VALID 12Z SUN NOV 10 2024 - 12Z TUE NOV 12 2024
...WET SUNDAY FOR MUCH OF THE EASTERN U.S., INCLUDING BENEFICIAL
RAINFALL FOR THE NORTHEAST...
...AN ATMOSPHERIC RIVER WILL BRING HEAVY COASTAL RAIN AND HIGH
ELEVATION SNOWFALL TO PORTIONS OF THE PACIFIC NORTHWEST BEGINNING
SUNDAY NIGHT...
...ABOVE AVERAGE TEMPERATURES WILL CONTINUE INTO NEXT WEEK FOR
MOST OF THE COUNTRY...
A BROAD AREA OF SHOWERS AND THUNDERSTORMS AHEAD OF A LOW PRESSURE
SYSTEM/ARCING FRONTAL BOUNDARY THROUGH THE MIDWEST SOUTH INTO THE
MISSISSIPPI VALLEY EARLY SUNDAY MORNING WILL CONTINUE EASTWARD
THROUGH THE DAY, BRINGING AN EXPANDING AREA OF MODERATE TO HEAVY
RAINFALL OVER THE EASTERN U.S. THE FRONT WILL PUSH EASTWARD
THROUGH THE OHIO VALLEY/INTERIOR NORTHEAST AND INTO NEW ENGLAND
AND THE MID-ATLANTIC BY SUNDAY EVENING, BRINGING BENEFICIAL
RAINFALL FOLLOWING MANY WEEKS OF LITTLE TO NO PRECIPITATION.
FURTHER SOUTH, THE FRONT WILL MAKE SLOWER PROGRESS AND KEEP
ADDITIONAL STORM CHANCES FOCUSED OVER THE TENNESSEE AND LOWER
MISSISSIPPI VALLEYS FOLLOWING HEAVY RAIN SATURDAY. MOISTURE
STREAMING NORTHWARD FROM THE GULF, INFLUENCED IN PART BY TROPICAL
STORM RAFAEL, WILL LEAD TO SOME LOCALLY HEAVY DOWNPOURS, WITH
ISOLATED FLASH FLOODING POSSIBLE. A LOCALIZED SLIGHT RISK OF
EXCESSIVE RAINFALL (LEVEL 2/4) IS IN PLACE OVER CENTRAL LOUISIANA
WHERE CONTINUED RAINFALL EARLY SUNDAY OVER VERY SATURATED
GROUNDS/ONGOING FLOODING MAY LEAD TO A FEW MORE SCATTERED
INSTANCES OF FLASH FLOODING. AN ADDITIONAL AREA OF SHOWERS AND
THUNDERSTORMS IS EXPECTED FOR PORTIONS OF THE COASTAL
CAROLINAS/GEORGIA AND INTO FLORIDA IN VICINITY OF A WAVY FRONTAL
BOUNDARY. MOST OF THE RAINFALL SHOULD COME TO AN END BY EARLY
MONDAY AS THE FRONT BEGINS TO CLEAR THE COAST OVER THE NORTHEAST
AND MOISTURE RETURN DECREASES TO THE SOUTH, THOUGH SOME LINGERING
SHOWERS WILL REMAIN POSSIBLE FOR THE INTERIOR NORTHEAST AS A
SECONDARY COLD FRONT PASSES THROUGH.
SOME LIGHT TO MODERATE LOWER ELEVATION RAIN SHOWERS AND HIGHER
ELEVATION SNOWS WILL CONTINUE OVER PORTIONS OF THE PACIFIC
NORTHWEST/NORTHERN ROCKIES THROUGH SUNDAY AFTERNOON AS A WAVY
FRONTAL BOUNDARY LINGERS IN THE REGION. THEN, A STRONGER PACIFIC
STORM SYSTEM/ATMOSPHERIC RIVER WILL APPROACH THE PACIFIC NORTHWEST
SUNDAY EVENING BRINGING MODERATE TO HEAVY COASTAL RAINS BY SUNDAY
NIGHT. THIS SYSTEM WILL CONTINUE INLAND INTO THE DAY MONDAY WITH
AN EXPANDING AREA OF PRECIPITATION ACROSS THE PACIFIC NORTHWEST,
NORTHERN GREAT BASIN/ROCKIES, AND NORTHERN/CENTRAL CALIFORNIA.
FAVORABLE UPSLOPE AREAS ALONG THE COASTAL MOUNTAIN RANGES MAY SEE
2-3" OF RAIN, WITH SOME POTENTIALLY MODERATE TO HEAVY ACCUMULATING
SNOWS FOR HIGHER ELEVATIONS OF THE CASCADES, SIERRA NEVADA, AND
NORTHERN ROCKIES. ANOTHER SYSTEM JUST BEYOND THE CURRENT FORECAST
PERIOD LOOKS TO BRING ANOTHER ROUND OF HEAVY RAIN AND MOUNTAIN
SNOWS MID-WEEK.
MOST AREAS OF THE COUNTRY WILL CONTINUE TO SEE TEMPERATURES 5-15
DEGREES ABOVE AVERAGE OVER THE NEXT COUPLE OF DAYS. FORECAST HIGHS
SUNDAY RANGE FROM THE 50S FOR THE PACIFIC NORTHWEST, GREAT BASIN,
NORTHERN ROCKIES/PLAINS, GREAT LAKES, AND NEW ENGLAND; THE 60S IN
CALIFORNIA, CENTRAL PLAINS, OHIO VALLEY, AND MID-ATLANTIC; AND THE
70S AND 80S FOR THE DESERT SOUTHWEST, TEXAS, LOWER MISSISSIPPI
VALLEY, AND THE GULF COAST. MUCH OF THE EAST COAST WILL SEE EVEN
WARMER HIGHS ON MONDAY AS RAIN CLEARS OUT, WITH HIGHS RISING INTO
THE 60S FOR COASTAL NEW ENGLAND AND THE 70S FOR THE MID-ATLANTIC,
CAROLINAS, AND GEORGIA. ONE REGION THAT WILL REMAIN COLDER WILL BE
PORTIONS OF THE CENTRAL/SOUTHERN ROCKIES AND HIGH PLAINS WHERE
GROUNDS REMAIN SNOW COVERED FOLLOWING THIS PAST FRIDAY'S HISTORIC
STORM, WITH HIGHS MAINLY IN THE 40S TO LOW 50S.
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