490
FXUS01 KWBC 162017
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
300 PM EST SAT DEC 16 2023
VALID 00Z SUN DEC 17 2023 - 00Z TUE DEC 19 2023
...A RAPIDLY INTENSIFYING LOW PRESSURE SYSTEM WILL BRING AN
INCREASINGLY STORMY END TO THE WEEK FOR THE ENTIRE EASTERN
SEABOARD REACHING UP INTO NEW ENGLAND ON MONDAY...
...COLDER AIR BEHIND THE STORM WILL TRIGGER LAKE-ENHANCED SNOW
FROM WEST TO EAST ACROSS THE GREAT LAKES TOWARD THE APPALACHIANS
ON MONDAY...
...A SLOW-MOVING OCEANIC STORM IN THE PACIFIC WILL SPREAD
UNSETTLED WEATHER UP THE WEST COAST THROUGH THE NEXT FEW DAYS...
A LOW PRESSURE SYSTEM CURRENTLY DEVELOPING AND EXPANDING OVER THE
RELATIVELY WARM WATERS OF THE GULF OF MEXICO IS FORECAST TO
INTERACT WITH A SURGE OF COLD AIR MASS FROM CENTRAL CANADA TO
DELIVER QUITE A STORMY END TO THE WEEK FOR THE EASTERN SEABOARD.
SHOWERS AND THUNDERSTORMS AHEAD OF THIS INTENSIFYING STORM SYSTEM
HAS ALREADY BEEN EXPANDING STEADILY OVER MUCH OF FLORIDA THIS
SATURDAY AFTERNOON. THIS IS ONLY A PRECURSOR OF WHAT IS TO COME
AS THE STORM CENTER IS STILL LOCATED OVER THE EASTERN GULF OF
MEXICO WHILE GATHERING STRENGTH MORE RAPIDLY. EAST TO
NORTHEASTERLY WINDS WILL FURTHER STRENGTHEN OVER ALL OF FLORIDA AS
THE STORM CENTER IS FORECAST TO REACH THE WEST COAST OF THE
PENINSULA EARLY SUNDAY MORNING. THE WIND SHEAR AHEAD OF THE STORM
CENTER COULD TRIGGER A FEW TORNADOES ACROSS THE FLORIDA PENINSULA
TONIGHT. BY SUNDAY, THE LOW PRESSURE CENTER IS FORECAST TO SKIRT
THE SOUTHEAST U.S. COAST, WITH THE BIGGEST THREAT OF HEAVY RAIN UP
THROUGH THE COASTAL PLAINS AS THE DAY PROGRESSES WITH HEAVY
THUNDERSTORMS POSSIBLY CONTAINING DAMAGING WINDS AND SEVERE
WEATHER. BY SUNDAY NIGHT, THE HEAVY RAIN SHOULD BE TAPERING OFF
OVER THE SOUTHEAST WHILE SPREADING UP RAPIDLY INTO THE
MID-ATLANTIC STATES AHEAD OF THE STORM CENTER, WITH SOME STRONG
THUNDERSTORMS POSSIBLE. THE STORM CENTER WILL THEN TRACK MORE
QUICKLY NORTHWARD INTO NEW ENGLAND ON MONDAY WHILE THE ENTIRE
SYSTEM EXPANDS ITS INFLUENCE ACROSS MUCH OF THE EASTERN U.S.
WIND-SWEPT RAIN, HEAVY AT TIMES, WILL THEN OVERSPREAD THE ENTIRE
NORTHEAST DURING THE DAY ON MONDAY. MEANWHILE, COLDER AIR FROM
CENTRAL CANADA WILL BE PULLED SOUTHEASTWARD ACROSS THE GREAT LAKES
ON MONDAY BEHIND THE BIG STORM, TRIGGERING LAKE-ENHANCED SNOW FROM
WEST TO EAST ACROSS THE GREAT LAKES AND TOWARD THE APPALACHIANS BY
MONDAY EVENING AS RAIN BEGINS TO TAPER OFF ACROSS THE
MID-ATLANTIC. EVEN THOUGH THE BIG STORM WILL BEGIN TO DEPART THE
NORTHEAST MONDAY EVENING, THE BIG STORM WILL OVERSPREAD THE ENTIRE
EASTERN U.S. WITH VERY BLUSTERY CONDITIONS.
MEANWHILE, A LARGE AND SLOW-MOVING OCEANIC STORM IN THE PACIFIC
WILL GRADUALLY MAKE ITS PRESENCE KNOWN FOR THE WEST COAST AS
UNSETTLED WEATHER AHEAD OF THE SYSTEM GRADUALLY SPREADS UP THE
WEST COAST THROUGH THE NEXT FEW DAYS. THE RAIN IS EXPECTED TO
REACH CENTRAL CALIFORNIA FIRST BUT NOT UNTIL SUNDAY NIGHT. THE
UNSETTLED WEATHER IS FORECAST TO EXPAND NORTHWARD THROUGH
CALIFORNIA BY MONDAY EVENING WHILE GETTING READY TO REACH THE
COASTAL SECTIONS OF THE PACIFIC NORTHWEST. THE REMINDER OF THE
WESTERN AND CENTRAL U.S. WILL REMAIN DRY THROUGH MONDAY UNDER A
STABLE AND EXPANSIVE HIGH PRESSURE SYSTEM. THE ENTIRE COUNTRY
WILL REMAIN MILDER THAN NORMAL FOR THIS TIME OF YEAR. IN FACT,
SOME RECORD HIGH TEMPERATURES ARE POSSIBLE ACROSS NEW ENGLAND ON
MONDAY AS WARM AND MOIST AIR FROM THE ATLANTIC SURGES INTO THE
REGION AMID WIND-SWEPT HEAVY RAIN IN THE HEIGHT OF THE BIG EASTERN
STORM.
KONG
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