State of the Snowpack for 1/23/2021 - 1/29/2021

Dates of the Week: 
1/23/2021 to 1/29/2021
Avalanche Problems: 

Update 2/5/2021:  Widespread avalanche cycle occurred during and immediately after the large storm event on Jan 27-29.  Reports of persistent slab avalanches occurring in many areas of the forecast region along with many wind slab avalanches.  Delayed reports due to limited visibility and continued storm conditions.

General Snowpack Structure: 
  • Rain crusts on all aspects on 1/22. Near crust facets below the rain crust. Dec 11 facets still present in the lower snowpack.
  • Cold light snow buried the crust and surface hoar formed on top of that snow before getting buried in some places by a second wave of cold light snow. 
  • 4-6 ft of storm snow buried those weak layers Tuesday - Saturday. 
Weather Events: 
  • Light snow (2-5 inches) with shifting winds (SW to NE) on 1/23-1/24
  • Another snow event on Sunday night through Monday night with up to a foot of snow
  • Atmospheric river event Tuesday night through Saturday morning with storm totals of 4 to 6 ft of new snow and SW - S winds.