338
FOUS11 KWBC 211915
QPFHSD
PROBABILISTIC HEAVY SNOW AND ICING DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
315 PM EDT SAT MAR 21 2026
VALID 00Z SUN MAR 22 2026 - 00Z WED MAR 25 2026
..NORTHEAST
DAYS 1-2...
A CLIPPER SYSTEM WILL TRACK ACROSS THE NORTHEAST LATE TODAY THROUGH
SUNDAY WITH SNOW SPREADING INTO NORTHERN NEW YORK THIS EVENING AND
NORTHERN NEW ENGLAND OVERNIGHT. WHILE WARM ADVECTION WILL BE A
PRINCIPLE DRIVER FOR THE DEVELOPING PRECIPITATION, IT COMBINED WITH
THE HIGH ANGLE WILL SUPPORT A CHANGEOVER TO RAIN ACROSS MUCH OF
UPSTATE NEW YORK AND SOUTHERN NEW ENGLAND ON SUNDAY. IN CONTRAST,
THE HIGHER ELEVATIONS OF THE ADIRONDACKS AND MUCH OF NORTHERN NEW
ENGLAND ARE EXPECTED TO REMAIN COLD ENOUGH FOR SNOW TO REMAIN THE
PRIMARY PRECIPITATION TYPE BEFORE THE SYSTEM EXITS SUNDAY NIGHT.
TERRAIN-ENCHANCED LIFTING ALONG WITH COOLER TEMPERATURES WILL
SUPPORT HEAVIER SNOW TOTALS ACROSS PORTIONS OF THE ADIRONDACKS,
GREEN, AND WHITE MOUNTAINS -- WITH SEVERAL INCHES LIKELY, AS
INDICATED BY THE GREATER THAN 50 PERCENT WPC PROBABILITIES FOR
ACCUMULATIONS OVER 8 INCHES.
WHILE LESSER AMOUNTS ARE MORE LIKELY ACROSS THE LOWER ELEVATIONS,
GUIDANCE INDICATES THAT LOW-TO-MID LEVEL FRONTOGENESIS MAY HELP
CONTRIBUTE TO BANDED HEAVIER SNOWFALL RATES (0.5-1 IN/HR) THAT MAY
BE SUFFICIENT ENOUGH TO SUPPORT A SWATH OF HEAVIER TOTALS FROM
EAST OF THE WESTERN MAINE MOUNTAINS TO DOWN EAST MAINE ON SUNDAY.
HIGHER PROBABILITIES FOR AMOUNTS OVER 4 INCHES HAVE EXPANDED ACROSS
THIS AREA AND ARE NOW GREATER THAN 70 PERCENT ACROSS A BROADER
AREA. ADDITIONALLY, PROBABILITIES FOR TOTALS OVER 8 INCHES HAVE
INCREASED IN THIS AREA ALSO, WITH SOME GREATER THAN 50 PERCENT
PROBABILITIES NEAR THE MAINE COAST.
PEREIRA
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