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
12/18/2020 - 16:30 Col between Schallenberger Ridge and Mount Judah Donner Summit Area Snowpack Observation Public
12/19/2020 - 09:00 Stevens Peak Carson Pass Area Avalanche Observation Public
12/19/2020 - 11:00 Charity Valley Creek North Carson Pass Area Avalanche Observation Public
12/19/2020 - 11:00 Mt. Lola Independence Lake Area Snowpack Observation Minor track collapsing into lower snowpack facets, but no significant snowpack collapses in this meadow. Minor amounts of windload from SW winds along ridgetop. Small wind slab at treeline, 5 inches max thickness. Forecaster
12/19/2020 - 12:00 Red Lake Peak Carson Pass Area Snowpack Observation Large surface hoar below 8000 feet on shady slopes. Coverage above Crater Lake. Similar snow structure to other areas in forecast area. Professional Observer
12/19/2020 - 12:00 Tamarack Peak, Relay Ridge Mount Rose Area Snowpack Observation 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
12/19/2020 - 12:30 Galena area Mount Rose Area Snowpack Observation Public
12/19/2020 - 13:00 Pole Creek Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Educator
Alpenglow Expeditions
12/19/2020 - 13:15 Andesite peak Donner Summit Area Snowpack Observation 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 School
12/19/2020 - 14:30 South Aspect of Tamarack Peak Mount Rose Area Snowpack Observation 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
12/20/2020 - 07:30 Tamarack Peak Mount Rose Area Snowpack Observation Public
12/20/2020 - 09:15 South Lake Tahoe Snowpack Observation Public
12/20/2020 - 12:00 Deep Creek Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation 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 - 12:30 Incline Peak Mount Rose Area Snowpack Observation Wind effected snow surfaces Public
12/20/2020 - 12:45 Along approach to My. Reba Bear Valley Area Snowpack Observation Large rollet balls or pinwheels visible on west aspect Public

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