792
FOUS11 KWBC 181932
QPFHSD
PROBABILISTIC HEAVY SNOW AND ICING DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
332 PM EDT SAT APR 18 2026
VALID 00Z SUN APR 19 2026 - 00Z WED APR 22 2026
..UPSTATE NEW YORK/NORTHERN NEW ENGLAND
DAYS 1/2...
A STRONG COLD FRONT CURRENTLY OVER OHIO SHIFTS INTO WESTERN NY
TONIGHT AND CROSSES THE NORTHEAST SUNDAY. THE ASSOCIATED MID-LEVEL
TROUGH AXIS IS OVER LAKE MICHIGAN AND WILL CROSS UPSTATE NY SUNDAY.
LIFT FROM THE MID-LEVEL TROUGH APPROACH AS WELL AS SFC LOW PRESSURE
DEVELOPMENT SUNDAY ALONG THE NJ TO EASTERN NEW ENGLAND COASTS WILL
AID SOME PRECIP ON THE COOL SIDE OF THE FRONT WITH SNOW AT HIGHER
ELEVATIONS IN INTERIOR NORTHEAST. DAY 1.5 SNOW PROBS FOR >4" ARE
30-60% FOR THE HIGHER ADIRONDACKS, GREENS, WHITES, AND ALONG THE
NH/MAINE BORDER WITH QUEBEC. INCLUDED IN THIS TIMEFRAME IS
ADDITIONAL UPSLOPE SNOW IN THIS TERRAIN FROM NW FLOW IN THE WAKE
OF THE FRONT SUNDAY NIGHT.
..CALIFORNIA
DAY 3...
LOW PRESSURE DEVELOPING WELL OF THE PACNW COAST (AROUND 135W)
DEEPENS AS IT DRIFTS SSE TO OFF FAR NORTHERN CA THROUGH MONDAY. THE
LOW THEN PIVOTS EAST TO NORTHERN CA THROUGH TUESDAY. DECENT
MOISTURE ARRIVES IN A PLUME AHEAD OF THE LOW WITH SNOW LEVELS
GENERALLY 6000-7000FT THAT THEN DROP AS LOW AS 5500FT TUESDAY UNDER
HEIGHT FALLS. DAY 3 SNOW PROBS FOR >6" ARE 40-70% FOR THE HIGHER
SIERRA NEVADA AS WELL AS MT LASSEN, SHASTA, AND THE TRINITY ALPS.
SNOW CONTINUES IN EARNEST THROUGH TUESDAY NIGHT AS THE LOW TRACKS
OVER THE SIERRA NEVADA.
THE PROBABILITY FOR SIGNIFICANT FREEZING RAIN EXCEEDING 0.1 INCHES
ACROSS THE CONUS IS LESS THAN 10 PERCENT.
JACKSON
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