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
01/23/2022 - 12:11

Snowpack Observation
Castle Peak

Donner Summit Area
Raised track and wind effect on the north face of Castle Sun softened snow on a South aspect @ 2pm Soft, surface faceted snow in sheltered terrain. 2-3mm surface hoar in a start zone above steep terrain Educator

West Wind Collecti
12/19/2021 - 13:15

Snowpack Observation
Relay Ridge

Mount Rose Area
Test slope producing small windslabs Wind texture and drifting snow along the ridge Dec 9 facets rounding Educator

West Wind Collecti
01/08/2016 - 07:00

Snowpack Observation
W end Boreal Ridge above Central Sierra Snow Lab

Donner Summit Area
Educator

Donner Summit Avalanche Semina
12/22/2019 - 13:15

Snowpack Observation
Andesite peak

Donner Summit Area
Small windslab on test slope Shooting cracks on test slope prior to the small slab releasing Educator

Tahoe Mountain Scho
02/08/2018 - 10:00

Snowpack Observation
South of Grouse Rock

Blackwood Canyon or Ward Canyon Area
Educator

Donner Summit Avalanche Semina
12/29/2020 - 14:00

Snowpack Observation
NE benches below Silver Peak

Cabin Creek, Deep Creek, or Pole Creek Area
Educator

Alpenglow Expeditio
12/12/2020 - 01:45

Snowpack Observation
Andesite Peak

Donner Summit Area
Very Small Wind slab (NE aspect) Educator

Tahoe Mountain Scho
01/07/2023 - 12:52

Snowpack Observation
Johnson Canyon

Donner Summit Area
Intense blowing snow over Sierra Crest in early afternoon CT showed no clean shears around the Jan 4 or Dec 31 RC.  E aspect, just below 7000'. Educator

Tahoe Mountain Scho
02/08/2023 - 10:30

Snowpack Observation
Deer Park

Five Lakes Area
Educator

Alpenglow Expeditio
12/17/2017 - 12:07

Snowpack Observation
Andesite Ridge

Donner Summit Area
Surface Conditions mix of sustrugi and melt freeze crusts Educator

Tahoe Mountain Scho
12/21/2019 - 02:00

Snowpack Observation
judah billboards

Donner Summit Area
Educator

Alpine Skills International (AS
01/06/2019 - 12:30

Snowpack Observation
Tamarack Peak

Mount Rose Area
One of many easily triggered windslabs today Shooting cracks were common today Educator

Tahoe Mountain Scho
02/06/2021 - 13:00

Snowpack Observation
Andesite Ridge

Donner Summit Area
Educator

NORTH AMERICAN SKI TRAINING AND CLIMBI
12/13/2022 - 23:22

Snowpack Observation
Donner Summit / Judah

Donner Summit Area
Educator

Blackbird Mountain Guid
02/23/2022 - 11:00

Snowpack Observation
Powderhouse

Luther Pass Area (including Job and Freel)
Educator

Lake Tahoe Community College - Wilderness Educati

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