These observations document past conditions at a small and variable scale. They are not to 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 Media Observation made by
12/21/2020 - 12:30
Snowpack Observation 		Castle Peak
Donner Summit Area 		Guide
Tahoe Mountain Scho
12/21/2020 - 12:00
Snowpack Observation 		Shirley Canyon
Cabin Creek, Deep Creek, or Pole Creek Area 		Surface Hoar Guide
Alpenglow Expeditio
12/21/2020 - 11:30
Snowpack Observation 		Slab Cliffs
Mount Rose Area 		Forecaster
12/21/2020 - 09:45
Snowpack Observation 		Scott Peak
Five Lakes Area 		Public
12/20/2020 - 14:30
Snowpack Observation 		Peter Leh
Donner Summit Area 		Public
12/20/2020 - 13:00
Snowpack Observation 		Deep Creek
Cabin Creek, Deep Creek, or Pole Creek Area 		Educator
Alpenglow Expeditio
12/20/2020 - 12:45
Snowpack Observation 		Along approach to My. Reba
Bear Valley Area 		Large rollet balls or pinwheels visible on west aspect Public
12/20/2020 - 12:30
Snowpack Observation 		Incline Peak
Mount Rose Area 		Wind effected snow surfaces Public
12/20/2020 - 12:00
Snowpack Observation 		Deep Creek
Cabin Creek, Deep Creek, or Pole Creek Area 		The largest whumpf of the day occurred in a N-facing meadow at about 7000 ft. Brandon is pointing to some cracks resulting from the collapse of the Dec 11 facet layer. Surface hoar in a meadow this morning. Forecaster
12/20/2020 - 07:30
Snowpack Observation 		Tamarack Peak
Mount Rose Area 		Public
12/19/2020 - 14:30
Snowpack Observation 		South Aspect of Tamarack Peak
Mount Rose Area 		Southern aspect in tree line, 75 cm deep Southern aspect in tree line, 75 cm deep Snow from the Dec 11th facet layer Snow from the Dec 11th facet layer Public
12/19/2020 - 13:15
Snowpack Observation 		Andesite peak
Donner Summit Area 		Dec 11 Facets, some appeared to start rounding at this location Students showcasing the current drastic difference between boot and ski pen Educator
Tahoe Mountain Scho
12/19/2020 - 13:00
Snowpack Observation 		Pole Creek
Cabin Creek, Deep Creek, or Pole Creek Area 		Educator
Alpenglow Expeditio
12/19/2020 - 12:30
Snowpack Observation 		Galena area
Mount Rose Area 		Public
12/19/2020 - 12:00
Snowpack Observation 		Tamarack Peak, Relay Ridge
Mount Rose Area 		Small test slope that triggered a wind slab to release. Slab that broke off runs from ski tips towards camera. See shooting cracks near back of skis. Same test slope as first photo, taken by individual on the test slope. Heavily wind affected snow in Hourglass Bowl. We did not ski Hourglass today. Public

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