These observations document past conditions at a small and variable scale. They are not too be confused with an avalanche forecast. They come from a variety of sources. We can only vouch for the quality of those produced by the SAC forecasters and professional observers.
Date and time of observation or avalanche occurrence Location Region Observation Type Photos Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
12/20/2020 - 13:00 Deep Creek Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Educator
Alpenglow Expeditions
12/20/2020 - 14:30 Peter Leh Donner Summit Area Snowpack Observation Public
12/21/2020 - 09:45 Scott Peak Five Lakes Area Snowpack Observation Public
12/21/2020 - 11:30 Slab Cliffs Mount Rose Area Snowpack Observation Forecaster
12/21/2020 - 12:00 Shirley Canyon Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Surface Hoar Guide
Alpenglow Expeditions
12/21/2020 - 12:30 Castle Peak Donner Summit Area Snowpack Observation Guide
Tahoe Mountain School
12/22/2020 - 02:30 Peter Leh Snowpack Observation Public
12/22/2020 - 10:30 Lincoln Ridge Yuba Pass Area Snowpack Observation Snow surface evidence of recent wind drifting (left to right). Skier triggered cracking near the edge of the wind slab adjacent to cornice. Mini fridge size cornice sections dropped onto wind slab without results. Forecaster
12/22/2020 - 13:00 Stevens Peak Carson Pass Area Avalanche Observation Wind Slab Cracking Wind Slab Cracking Wind Slab Cracking Natural D1 Wild Slab Avalanche Public
12/22/2020 - 14:00 Andesite Peak Donner Summit Area Snowpack Observation Guide
Alpenglow Expeditions
12/22/2020 - 15:00 Becker Ridge Echo Summit Area Snowpack Observation Public
12/23/2020 - 11:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Wind effects on the ridge of Silver Debirs and variable wind packed surfaces in below treeline areas Forecaster
12/23/2020 - 11:00 Mt. Judah Donner Summit Area Snowpack Observation Firm wind scoured surfaces were common in most areas. Several small D1 wind slab avalanches along the E face of Judah. Unknown trigger, 1-2 days old. Some blowing snow off of the higher peaks on the Sierra Crest. 4-8mm surface hoar throughout this area. Forecaster
12/23/2020 - 12:00 Woods Lake Carson Pass Area Snowpack Observation Professional Observer
12/23/2020 - 12:30 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Cracking on windslabs when we undercut the slope Enjoying a ridgetop transition with calm winds Shooting cracks on stiff windslabs Educator
Alpenglow Expeditions

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