During the next couple of days, over a half a foot of precipitation is expected across much of the Cascades, with snow dominating later on as colder air arrives from the north. Through Tuesday morning, the WPC winter weather forecast suggests over a foot of snow over the Cascades with somewhat higher amounts possible further inland across the Bitterroots, Sawtooth, Northern Rockies over Montana, and the Tetons. The intensity of the precipitation should gradually diminish by early Monday as the powerful upper low drops down from British Columbia. As this dynamic system impacts much of the Western U.S., a warm front at the surface will gradually lift northward as moisture return from the Gulf of Mexico commences by Monday afternoon. As the aforementioned upper low begins to dominate the Pacific Northwest, multiple impulses will slide eastward off this low center which will help spawn areas of rain/snow showers across the Northern Plains/Upper Midwest. The fact the precipitation will be of the mixed bag variety should limit the snowfall accumulations with only a widespread 2 to 4 inches expected through early Tuesday.
Posted on: Sun, 01 Dec 2013 13:04:59 +0000
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