081
FOUS11 KWBC 231939
QPFHSD
PROBABILISTIC HEAVY SNOW AND ICING DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
339 PM EDT FRI OCT 23 2026
VALID 00Z SAT OCT 24 2026 - 00Z TUE OCT 27 2026
..NORTHERN ROCKIES
DAY 1...
AN UPPER TROUGH WILL MOVE OUT OF SOUTHWESTERN MT THIS EVENING AND
INTO CANADA OVERNIGHT. ONGOING MOUNTAIN SNOW WILL ACCUMULATE
SEVERAL INCHES AFTER 00Z ABOVE ABOUT 5000FT OR SO BEFORE ENDING
06-09Z. SNOW COULD FALL MODERATE-HEAVY AT TIMES IN BANDED AREAS
WITH 1"/HR RATES AROUND 00Z THIS EVENING. WPC PROBABILITIES FOR AT
LEAST AN ADDITIONAL 4 INCHES OF SNOW ARE HIGHEST (>50%) ABOVE
5000FT.
..COLORADO
DAYS 1-2...
SOUTHERN PORTION OF THE NORTHERN UPPER TROUGH WILL SPLIT OFF AND
DIG THROUGH THE LOWER CO RIVER VALLEY SATURDAY BEFORE LIFTING
ACROSS THE FOUR CORNERS REGION SUNDAY. SOUTHERLY FLOW WILL BRING IN
A MODERATE MOISTURE PLUME BUT WITH HIGH SNOW LEVELS AROUND
11,000FT SATURDAY. THOSE WILL FALL TO AROUND 9000FT WITH INCREASING
SNOW RATES AND MODEST SNOW ACCUMULATIONS IN THE HIGHER TERRAIN OF
THE SAN JUANS AND CO RANGES. THERE, WPC PROBABILITIES FOR AT LEAST
8 INCHES OF SNOW ARE >50% ABOVE ABOUT 10,000FT OR SO. SNOW WILL
LIGHTEN AND END FROM SOUTHWEST TO NORTHEAST ON SUNDAY NIGHT.
FOR DAY 3, THE PROBABILITY OF SIGNIFICANT SNOWFALL ACROSS THE
CONUS IS LESS THAN 10 PERCENT.
FOR DAYS 1-3, THE PROBABILITY OF SIGNIFICANT ICE ACROSS THE CONUS
IS LESS THAN 10 PERCENT.
FRACASSO
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