605
FXUS01 KWBC 110721
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
220 AM EST MON NOV 11 2024
VALID 12Z MON NOV 11 2024 - 12Z WED NOV 13 2024
...AN ATMOSPHERIC RIVER WILL BRING A COUPLE ROUNDS OF HEAVY, LOWER
ELEVATION RAIN AND HIGH ELEVATION MOUNTAIN SNOW TO THE PACIFIC
NORTHWEST AND NORTHERN CALIFORNIA...
...LINGERING PRECIPITATION CHANCES FOR THE NORTHEAST AND CAROLINAS
MONDAY WITH SOME LOCALLY HEAVIER RAINFALL ALONG THE CENTRAL GULF
COAST...
...ABOVE AVERAGE TEMPERATURES CONTINUE FOR MUCH OF THE COUNTRY,
MORE SEASONABLE TEMPERATURES FOR THE NORTHEAST AND THE WEST ON
TUESDAY...
A PAIR OF PACIFIC STORM SYSTEMS WILL HELP TO USHER IN WAVES OF
MOISTURE INTO THE PACIFIC NORTHWEST AND NORTHERN CALIFORNIA IN AN
ACTIVE ATMOSPHERIC RIVER PATTERN OVER THE NEXT COUPLE OF DAYS.
MODERATE TO HEAVY COASTAL RAIN AND HIGH ELEVATION MOUNTAIN SNOW IS
ALREADY ONGOING OVER THE PACIFIC NORTHWEST THIS MORNING AND WILL
CONTINUE TO SPREAD INLAND AS WELL AS INTO NORTHERN CALIFORNIA
THROUGHOUT THE DAY MONDAY. A MODERATE LOWER ELEVATION RAIN/WINTRY
MIX AND HIGHER ELEVATION SNOW WILL ALSO SPREAD INTO PORTIONS OF
THE NORTHERN ROCKIES AND GREAT BASIN BY MONDAY EVENING. SOME
LOCALLY HEAVIER SNOWFALL TOTALS OF 8-12"+ WILL BE POSSIBLE FOR THE
CASCADES WITH MORE MODERATE TOTALS ELSEWHERE. PRECIPITATION WILL
LINGER INTO TUESDAY FOR THE PACIFIC NORTHWEST AND NORTHERN
ROCKIES/GREAT BASIN AS WELL AS SPREAD INTO THE CENTRAL ROCKIES AS
THIS SYSTEM CONTINUES INLAND. THEN, ON TUESDAY EVENING, A SECOND
SYSTEM WILL APPROACH THE PACIFIC NORTHWEST BRINGING THE NEXT WAVE
OF MOISTURE INLAND. SHOWERS AND EVEN SOME THUNDERSTORMS ALONG THE
COAST AND UPSLOPE PORTIONS OF THE COASTAL RANGES WILL LEAD TO SOME
HEAVIER RAINFALL TOTALS LATE TUESDAY INTO EARLY WEDNESDAY, WITH AN
ISOLATED THREAT FOR FLOODING. ADDITIONAL HEAVY SNOWFALL IS ALSO
EXPECTED FOR THE CASCADES.
SOME SHOWERS AND THUNDERSTORMS WILL LINGER IN THE CAROLINAS AND
ALONG THE CENTRAL GULF COAST AHEAD OF A COLD FRONT PUSHING OFF THE
EAST COAST THROUGH THE DAY MONDAY. HIGHER MOISTURE ALONG THE GULF
COULD LEAD TO SOME LOCALLY HEAVIER DOWNPOURS. A SECONDARY COLD
FRONT TO THE NORTHWEST WILL ALSO BRING SOME ADDITIONAL LIGHT TO
MODERATE SHOWERS TO THE INTERIOR NORTHEAST, WHICH MAY INCLUDE A
WINTRY MIX BY MONDAY EVENING. ELSEWHERE, SOME ISOLATED SHOWERS AND
STORMS WILL BE POSSIBLE ACROSS THE CENTRAL/NORTHERN PLAINS AND
MISSISSIPPI VALLEY LATE TUESDAY/EARLY WEDNESDAY MORNING AS THE
FIRST STORM SYSTEM OVER THE WEST REACHES THE REGION.
FORECAST HIGH TEMPERATURES MONDAY CONTINUE TO REMAIN ABOVE AVERAGE
BY AROUND 5-15 DEGREES FOR MUCH OF THE COUNTRY. SOME OF THE MOST
UNSEASONABLY WARM HIGHS WILL BE THROUGHOUT NEW ENGLAND, WITH HIGHS
IN THE 50S AND 60S, AND THE MID-ATLANTIC, WITH HIGHS INTO THE 60S
AND 70S. OTHERWISE, TEMPERATURES RANGE FROM THE 40S AND 50S IN THE
NORTHERN PLAINS/MIDWEST; THE 50S AND 60S FOR THE PACIFIC
NORTHWEST, NORTHERN ROCKIES, GREAT BASIN, AND CALIFORNIA; THE 50S
FOR THE CENTRAL PLAINS AND OHIO VALLEY; AND THE 70S AND 80S FOR
THE DESERT SOUTHWEST, TEXAS, AND THE SOUTHEAST. A COLD FRONT
PASSING THROUGH THE NORTHEAST WILL BRING MUCH COOLER, MORE
SEASONABLE TEMPERATURES TUESDAY, AS HIGHS FALL INTO THE 40S AND
50S. THE PACIFIC SYSTEM PASSING THROUGH THE WEST WILL ALSO BRING
SOME MORE SEASONABLE TEMPERATURES TUESDAY, WITH HIGHS FALLING INTO
THE 40S FOR THE GREAT BASIN/NORTHERN ROCKIES AND THE 60S AND 70S
IN THE DESERT SOUTHWEST.
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