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 Region Observation Type Photos Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
12/27/2021 - 05:00 Hidden Peak - Goat Cliffs West Shore Area Avalanche Observation Mostly filled-in avalanche crown in the Goat Cliffs area of Hidden Peak. Forecaster
12/26/2021 - 12:00 Prosser Hill Little Truckee Summit Areas Snowpack Observation Skin track refill in ~30min. Wind slab development. Strong winds and copious amounts of snow for transport. Public
12/26/2021 - 11:00 Kingsbury/Spooner East Shore Area Snowpack Observation Professional Observer
12/25/2021 - 12:00 Powderhouse Luther Pass Area (including Job and Freel) Snowpack Observation Textured snow surface from snow falling off trees Evidence of snow settlement Fully scoured windward ridge aspect Cracking on a wind loaded test slope Nearly filled in skin track Professional Observer
12/24/2021 - 13:33 Spooner Summit East Shore Area Snowpack Observation Public
12/24/2021 - 12:00 Border Ruffian Carson Pass Area Snowpack Observation Professional Observer
12/24/2021 - 10:30 Flower Ridge, Mt. Judah Donner Summit Area Avalanche Observation First easy cornice collapse, just feet from the parking lot. Propagating wind slab failure on one of the many test slopes along our approach. Open creek at 7,200' with an impressive flow following the Dec 22 rain event. Public
12/24/2021 - 09:48 East of Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation Public
12/23/2021 - 17:00 Burnt Glades Echo Summit Area Snowpack Observation Public
12/23/2021 - 13:00 Powderhouse Luther Pass Area (including Job and Freel) Snowpack Observation Periods of blizzard conditions. 3-4" of new snow @ 7600' @ 10:00am Pit profile. ECTP 29 that did not repeat itself in two more tests after. Large Facet trending towards rounding at bottom of pack. Moist semi-compressible snow within the bottom 30cm. Skin track filling in fast from blowing snow. Professional Observer
12/23/2021 - 12:00 Andesite Peak Donner Summit Area Avalanche Observation The largest wind slab we saw. It was triggered by a backpack size piece of cornice kicked onto the slope. Another view of that same avalanche. The crown was about 1 ft deep at the deepest. Two smaller wind slab on a nearby test slope. The lower one was triggered by a ski kick and the upper one by an oven sized piece of cornice. Alternate view of the test slope avalanches. The crown height on these was between 8 and 12 inches. Forecaster
12/23/2021 - 10:30 Elephant's Hump Carson Pass Area Snowpack Observation Professional Observer
12/22/2021 - 13:30 North Carson Pass Carson Pass Area Snowpack Observation Large cornice build up and recent debris pile. Shovel tilt displaying top 10cm of new snow failing on buried surface hoar. Top 10cm of snow wet and compressible. Intermittent waves of sunshine and snow throughout the day. Precipitation particles were mostly small flakes and sometimes small ice pellets like shown here. Professional Observer
12/22/2021 - 12:00 Tamarack Peak Mount Rose Area Snowpack Observation 6-8 inch deep wind slab on a small wind-loaded test slope. Newly formed 6-8 inch deep wind slab on a small wind-loaded test slope. Another small wind slab failure on a wind-loaded test slope. Skier triggered shooting crack in a wind-loaded area near the ridge. Forecaster
12/21/2021 - 22:35 Independence Lake Independence Lake Area Snowpack Observation Snow available for transport.  Skin track re-fill Wind effect. Public

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