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Significant moisture will be streaming into the Northwest over the next several days. Temperatures will start out cool with all snow to the bases late Thursday/Friday (4,000 feet). A break in the action late Friday into Saturday will migrate to a wetter system late Saturday-Monday. That system will be warmer and bring significant high elevation snow above 6,000 feet. Powder Alert is primarily for the Thursday PM/Friday system with colder temperatures. System will impact northern Oregon (Mount Hood), all the way up through Whistler. Expect highest amounts from Crystal to Mount Baker by late Friday (7-12). Temperatures will favor the northern Cascades however Crystal has elevation advantages for the 2nd storm Saturday/Monday. The weekend storm will bring higher moisture and 6,000 foot snow levels Saturday night through Sunday. Colder air moves in late Sunday changing all rain at the bases back to snow. Light snow will linger into Monday so there is a chance of another chase day late Sunday or early Monday (Watch for wet Mank).
IDAHO/TETONS: Models are digging the first storm Thursday night/Friday further south so areas from Stanley and north may see the highest amounts (5-8). Areas from Schweitzer and into the East Cascades of Washington should grab 6-10 inches. Brundage near McCall Idaho could reap higher rewards with cold air trapped in the valleys with better snow densities.
The Tetons are on watch for the leftovers spilling in Friday PM- Saturday morning. I am confident in 5-7 inches by early Saturday. .Higher amounts possible? The next storm for the Tetons will move in Sunday morning through Monday with a period of continuous light to occasional moderate snow.
Chases? Baker, Crystal, Brundage, Schweitzer, Whistler Friday? Tetons Saturday AM? Cascades again by late Sunday or Monday with drier snow on top of some wet Mank.
This has been the winter for more dense snow than I can remember in a long time! We had that week of Sub Arctic Air early in the season that blasted the Tetons and northern Colorado. Long term models are showing a chance of colder air and higher chances of snow for the Northwest late January. Storms might dig further south!