FOUS11 KWBC 120744
QPFHSD

Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
344 AM EDT Mon Oct 12 2026

Valid 12Z Mon Oct 12 2026 - 12Z Thu Oct 15 2026

...Great Basin to the Central Rockies... Days 1-3...

The mid-level low over eastern Oregon this morning will sink 
southward into Nevada today and head toward the AZ/UT border by 
late Tuesday and into west central Colorado by early Wednesday. 
Snow levels will be rather high ahead of the trough with the 
southwesterly flow into the region. As the upper low moves through,
snow levels will drop from 9000-11,000ft to about 7000-9000ft 
beneath the upper low itself. Snow will slowly end from west to 
east starting Wednesday afternoon in Nevada and into Utah by the 
end of this forecast (12Z Thu), with snow still ongoing over 
Colorado beneath the upper low. WPC probabilities of at least 8 
inches of snow are >50% above about 7000ft in NV, 9000ft in UT, 
10,000ft in WY, and 11,000ft in CO. 


...Northern and Western Maine... Day 2...

A cold front will push through Maine tonight into early Tuesday, 
allowing temperatures to fall just below freezing near the Canadian
border. Surface low pressure over the Great Lakes will ride along 
the front and bring in light to modest precipitation starting 
Tuesday morning. With 750-850mb temperatures just above 0C, some 
sleet or freezing rain is possible for especially sheltered 
locations. The HREF show higher and more expansive probabilities of
ZR compared to the REFS, but it is the opposite for sleet. Either 
way, a wintry mix is likely for far northwestern/interior Maine 
early Tuesday before milder air turns everything to rain later in 
the day. WPC probabilities of at least 0.1" icing are 10-20% near 
the NH and Canadian borders. 


Fracasso


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