Officially the first true POWDER ALERT issued for consistent models showing 2-4 days of moisture over the Northwest beginning tonight and migrating into the Sierra by Sunday/Monday. The Wasatch gets into the action by early next week as well as the Tetons under a warm front keeping snowfall at higher elevations until Wednesday when colder air enhances the powder gods.. The Sierra might end up being the chase winners by mid next week!
Synopsis: Showers will break out in the Northwest Cascades today and eventually turn to snow on Saturday with snow levels falling to just over 3,000 feet by mid-morning (That is more characteristic of December temperatures). Light to occasionally moderate snow will fall through Saturday night (Peak), however continue intermittently through Monday-Tuesday. The Sierra will see light snow by Monday morning turning moderate to occasionally heavy in the evening. Snow will taper some on Tuesday with a reinforcing cold front bringing potentially moderate to heavy snow to the Sierra by Wednesday morning (6-12 additional). The models depict snow in the northern Wasatch by Monday afternoon above 7,000 feet (light to moderate), with a potentially higher amounts by Wednesday/Thursday as colder air filters in (6-9). The highest amounts will end up further North under Southwest Flow in areas such as Powder Mountain and Snowbasin.. The Tetons will see light to moderate snow Monday-Thursday with the peak intensity on Wednesday when some colder air filters closer to the Wyoming/Utah border. Currently it looks like most of the moisture stays near the UT/WY/CO borders so northern Colorado might see snowfall especially by Wednesday/Thursday. I-70 will be a wildcard as the front hovers near the northern borders.
Next week should see our first base building in many areas for the season and the Non Teasing amounts that will stay for the remainder of the Fall.
Long Range? Models are showing another decent looking system reloading in the Pacific Northwest by next weekend as things remaiin active in the north.