871
FOUS11 KWBC 221931
QPFHSD
PROBABILISTIC HEAVY SNOW AND ICING DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
331 PM EDT SUN MAR 22 2026
VALID 00Z MON MAR 23 2026 - 00Z THU MAR 26 2026
..NORTHERN NEW ENGLAND
DAY 1...
WHILE THE PRIMARY PRECIPITATION SHIELD ASSOCIATED WITH A CLIPPER
SYSTEM CROSSING THE NORTHEAST IS FORECAST TO BEGIN MOVING OFFSHORE
THIS EVENING, A SECONDARY PERIOD OF ACCUMULATING SNOW IS EXPECTED
ON MONDAY. AN INVERTED TROUGH, EXTENDING BACK FROM THE DEPARTING
LOW, IS FORECAST TO DEVELOP AND LINGER ACROSS EASTERN NEW ENGLAND.
THIS FEATURE WILL LIKELY ACT TO FOCUS A NORTH-SOUTH ORIENTED BAND
OF SNOW SHOWERS THAT COULD INTENSIFY LATE MONDAY AS AN
INTENSIFYING SHORTWAVE AND ASSOCIATED COLD POOL ALOFT PIVOT INTO
THE REGION FROM THE WEST.
GIVEN THE ADDED LIFT AND SOME MODEST INSTABILITY, LOCALIZED HEAVIER
BURSTS ARE POSSIBLE, ESPECIALLY IN NORTHERN NEW HAMPSHIRE AND
WESTERN MAINE WHERE THE INVERTED TROUGH MAY ALIGN WITH FAVORABLE
UPSLOPE FLOW. WPC PROBABILITIES INDICATE THAT AN ADDITIONAL 2-4
INCHES ARE POSSIBLE WITH THIS BAND, WITH THE HIGHEST PROBABILITIES
(50-70+ PERCENT) FOCUSED OVER THE NORTHERN NEW HAMPSHIRE AND
WESTERN MAINE MOUNTAINS.
..WASHINGTON CASCADES & OLYMPICS
DAYS 2-3...
A DEEPENING STORM LIFTING FROM THE NORTHEASTERN PACIFIC INTO
BRITISH COLUMBIA WILL BRING WIDESPREAD MODERATE TO HEAVY
PRECIPITATION INTO THE REGION ON TUESDAY. HOWEVER, THE HEAVIEST
PRECIPITATION RATES ARE EXPECTED TO COINCIDE WITH RELATIVELY HIGH
SNOW LEVELS THROUGH TUESDAY AFTERNOON. CONSEQUENTLY, THE BULK OF
THE SIGNIFICANT ACCUMULATING SNOW (GREATER THAN 8 INCHES) WILL
REMAIN ABOVE THE MAJOR PASSES AND CONFINED TO THE HIGHER PEAKS OF
THE OLYMPICS AND THE NORTHERN CASCADES.
AS THE FRONT CROSSES THE REGION LATE TUESDAY AND EARLY WEDNESDAY,
SNOW LEVELS WILL BEGIN TO PLUNGE TOWARD 3,000 FT, BUT THIS COOLING
WILL OCCUR AS THE DEEPEST MOISTURE BEGINS TO SHIFT EAST. HOWEVER,
SOME OF PASSES MAY SEE A PERIOD OF RAIN CHANGING TO SNOW, IMPACTING
TRAVEL.
THE CHANCES FOR SIGNIFICANT ICE ACROSS THE CONUS IS LESS THAN
10 PERCENT.
PEREIRA
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