918
FOUS11 KWBC 121821
QPFHSD
PROBABILISTIC HEAVY SNOW AND ICING DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
221 PM EDT MON OCT 12 2026
VALID 00Z TUE OCT 13 2026 - 00Z FRI OCT 16 2026
..GREAT BASIN TO THE CENTRAL ROCKIES
DAYS 1-3...
THE MID-LEVEL LOW OVER EASTERN OREGON TODAY WILL SINK SOUTHWARD
INTO NEVADA TONIGHT, HEAD TOWARD THE AZ/UT BORDER BY LATE TUESDAY
AND INTO COLORADO BY LATER WEDNESDAY. THIS SYSTEM WILL BRING HIGHER
ELEVATION SNOW TO PORTIONS OF NV/UT/CO/WY THROUGH EARLY THURSDAY.
SNOW LEVELS WILL START HIGH, BUT GRADUALLY LOWER AS THE UPPER LOW
MOVES OVERHEAD. NONETHELESS, ANY SIGNIFICANT SNOWFALL ACCUMULATIONS
ARE EXPECTED TO REMAIN IN THE ELEVATED TERRAIN. ACCUMULATIONS OF
AT LEAST 8 INCHES SHOULD STAY ABOVE 9000 FEET IN UTAH AND 10000
FEET IN CO, WITH SOME LIGHTER ACCUMULATIONS POTENTIALLY GETTING
DOWN TO 7000 OR 8000 FEET AS THE UPPER LOW MOVES OVERHEAD. THE MAIN
TREND FROM CONTINUITY WAS AN UPTICK IN SNOWFALL ACCUMULATIONS
ABOVE 10000 FEET IN THE SAN JUAN MOUNTAINS OF SOUTHWEST CO.
..NORTHERN AND WESTERN MAINE
DAY 1-2...
A WINTRY MIX IS EXPECTED TO IMPACT PORTIONS OF WESTERN AND NORTHERN
MAINE TUESDAY. COLDER AIR IN THE LOW LEVELS AND A MODEST WARM NOSE
ALOFT SHOULD SUPPORT SOME LIGHT SLEET AND/OR FREEZING RAIN
ACCUMULATIONS OVER WESTERN MAINE TUESDAY MORNING, AS HIGHLIGHTED BY
NBM/HREF/REFS PROBABILITIES. TEMPERATURES WILL BE RIGHT AROUND
FREEZING, AND THUS ONLY EXPECTING LIGHT ACCUMULATION OF ANY MIXED
WINTER WEATHER. OVER NORTHERN MAINE COOLER TEMPERATURES ALOFT WILL
ALLOW FOR A PERIOD OF SNOW, WITH THE MODEL CONSENSUS SUPPORTING A
COATING TO 2 INCHES OF ACCUMULATION.
CHENARD
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