State of the Snowpack for 11/30/2019 - 12/6/2019

Dates of the Week: 
11/30/2019 to 12/6/2019
Avalanche Problems: 
  • Wind slabs - Several avalanches reported in two different groups. One group during and just after the storm from 11/30-12/2 and another group during a wind event on 12/5 and 12/6. Both groups had natural and human-triggered avalanches. One near miss occurred on Thursday. 
  • Storm slab - A few instabilities reported during the storm from 11/30 to 12/2.
  • Loose wet - A few natual avalanches reported during the rain (12/1-12/2) and on Tuesday (12/3) when the sun came out. 
General Snowpack Structure: 
  • The 11/30-12/2 storm deposited heavy snow on top of colder lighter snow creating an upside-down snowpack early in the week. In some areas, a thin layer of facets existed near the base of the snowpack.
  • By the end of the week, the snowpack had gained strength and consolidated into a right-side-up pack.
Weather Events: 
  • Large winter storm with strong winds, warming temperatures, and significant precipitation falling as a mix of rain and heavy snow last weekend 11/30-12/2. 
  • Wind event that transported snow and formed wind slabs on the night of 12/4 and during the day on 12/5 and 12/6.