SIGNIFICANT DUMP NEXT WEEK FOR THE SIERRA- LEFTOVERS AIMED AT THE WASATCH AND MOST OF THE CENTRAL ROCKIES
Its Sunday morning and in the short term all eyes are on the several systems impacting the Pacific Northwest this week. Whats different from previous systems are a gradual trend for colder air and moisture to work further south towards the entire Sierra Range (Includes Kirkwood, Squaw, Heavenly, Mammoth, Sugar Bowl). “I think everyone is going to get into the action on the mid to late week storm in California” “There will be a teaser on Tuesday with the real stuff coming later in the week”
2 systems will impact the region beginning Tuesday (Light to moderate) followed by heavier snowfall towards the end of the week. It’s a bit early on amounts with my best guess of 3-7 inches Tuesday and 7-15 inches late week. It’s possible that 1-2 foot snowfall totals may be found in the highest peaks (Above 8500) by next weekend in the Sierra. We are issuing a Powder Watch for most of the Sierra Range for the late week period! Mammoth may come out with the highest amounts?
Below: Snowfall totals through early Friday morning impacting a wide area of the Sierra range
Other good news is that decent leftovers are aimed at the Wasatch, Tetons, and a good portion of Colorado in the extended forecast. Utah has a decent chance of a foot or more of powder Thursday night/Friday with good westerly flow.
Below: Northern and southern Wasatch ranges of Utah get a decent dump late week
Colorado may do well with West/Northwest flow impacting most of the mountain regions of north/central Colorado (Steamboat, Vail, Breckenridge, Aspen, Monarch, Telluride- wildcard) towards the end of the week. I am optimistic!
In the short term, look for 2-3 feet of snow for the Cascades this week with each system being colder and deeper by mid week. Winds will be strong creating blowing and drifting snowfall by Wednesday morning. Resorts will be opening in some areas of Washington! Look for rope drops by the end of the week.
Below: Total snowfall in the Cascades (WA/OR) through Wednesday night (Deepness).
EXTENDED POW CAST
Some additional snow is possible late next weekend in the Northwest with a migration towards high pressure during the week of Thanksgiving. It’s possible that moisture will shift further north over Canada or the far northern Rockies. That eventually drops into the Midwestern States perhaps extending into the East coast at some point near the Thanksgiving holiday.
Map: November 22nd – Trend for high pressure in the PNW and Rockies with perhaps a storm system over the East. Confidence is low-medium this far out!
Powderchaser Steve- Head Forecaster . 11/12/17 . 8AM MST
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