281
FXUS01 KWBC 170814
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
313 AM EST FRI NOV 17 2023
VALID 12Z FRI NOV 17 2023 - 12Z SUN NOV 19 2023
...HEAVY RAIN OVER EASTERN TO NORTHERN FLORIDA PENINSULA EXPECTED
TO TAPER OFF LATER TODAY AS MAIN LOW PRESSURE SYSTEM MOVES OUT TO
SEA...
...UNSETTLED WEATHER EXPANDING INTO THE WESTERN U.S. THROUGH THE
WEEKEND...
...A COLD FRONT WILL USHER GUSTY WINDS AND MUCH COLDER
TEMPERATURES FROM THE NORTHERN PLAINS TODAY AND SPREADING INTO THE
EASTERN U.S. ON SUNDAY...
A COASTAL CONVERGENCE ZONE SET UP ON THE BACK SIDE OF AN EXITING
LOW PRESSURE SYSTEM HAS HELPED PRECIPITATING TROPICAL MOISTURE
NEAR AN INVERTED TROUGH ACROSS EASTERN TO NORTHERN FLORIDA LAST
NIGHT INTO EARLY THIS MORNING, RESULTING IN EXCEPTIONALLY HEAVY
RAINFALL. AS THE MAIN LOW PRESSURE CENTER TRACKS FARTHER OUT INTO
THE ATLANTIC TO THE NORTH OF THE BAHAMAS TODAY, THE HEAVY RAIN
THREAT IS EXPECTED TO DIMINISH OVER THE FLORIDA PENINSULA. THE
COLD FRONT THAT HELPS PUSH THIS LOW PRESSURE SYSTEM OUT TO SEA IS
EXPECTED TO BRING A BRIEF SURGE OF MUCH COLDER TEMPERATURES WITH
GUSTY WINDS ACROSS THE NORTHERN PLAINS AND THE GREAT LAKES TODAY,
BEFORE OVERSPREADING MUCH OF THE EASTERN U.S. BY SUNDAY.
SCATTERED SHOWERS ARE EXPECTED TO BE AHEAD OF AND ALONG THE FRONT
ACROSS THE GREAT LAKES AND OHIO VALLEY TODAY, BEFORE SLIDING FROM
WEST TO EAST ACROSS THE NORTHEAST ON SATURDAY. COLDER AND DRIER
AIR WILL REACH INTO NEW ENGLAND BY SUNDAY MORNING WITH LIGHT SNOW
POSSIBLE OVER THE INTERIOR SECTIONS.
MEANWHILE, MORE ACTIVE WEATHER WILL REACH INTO THE WESTERN U.S.
THROUGH THIS WEEKEND AS A COUPLE OF MORE VIGOROUS SYSTEMS FROM THE
PACIFIC FORCE THEIR WAY INTO THE WEST COAST. A DEEP LOW WILL
FIRST BRING SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS TO
CALIFORNIA TODAY AND THEN SNOW TO THE SIERRA NEVADA THIS WEEKEND.
THE LOW WILL PHASE WITH A NORTHERN STREAM
TROUGH AND EXPAND RAINFALL COVERAGE INTO THE PACIFIC NORTHWEST ON
SATURDAY. SNOW LEVELS WILL DROP AS COOL AIR FILTERS INTO THE
REGION, SUPPORTING HEAVY SNOW OVER THE CASCADES ON SATURDAY AND
SUNDAY. BY SUNDAY MORNING, HIGH-ELEVATION SNOW AND VALLEY RAIN ARE
EXPECTED TO OVERSPREAD THE INTERMOUNTAIN WEST, EVEN INTO THE
CENTRAL TO SOUTHERN ROCKIES, AS A COLD FRONT PUSHES ACROSS THE
INTERIOR WESTERN U.S.
KONG/KEBEDE
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