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
12/14/2020 - 09:00 Grouse Rock Blackwood Canyon or Ward Canyon Area Snowpack Observation Educator
Blackbird Mountain Guides
12/14/2020 - 10:00 Tamarack Peak Mount Rose Area Snowpack Observation Public
12/14/2020 - 11:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Northerly below treeline terrain like this is where the Dec 11 weak layer is present. Cracking down to Dec 11 facet layer when traveling through terrain. Widespread whumpfing and cracking started around 7000' in terrain like this. Forecaster
12/14/2020 - 12:00 Lower Round Top Carson Pass Area Snowpack Observation Professional Observer
12/14/2020 - 14:30 Ellis Peak Blackwood Canyon or Ward Canyon Area Snowpack Observation Public
12/15/2020 - 09:15 Above long creek Yuba Pass Area Snowpack Observation EctP7down35 cm. On dec 11 layer December 11 facet layer Snow pit Public
12/15/2020 - 11:00 Mt Judah Sunflower Ridge Donner Summit Area Snowpack Observation Dec11 facets are uniformly fist hard and loose below new snow and rain crust Low Tide generally small cornice on judah ridge Public
12/15/2020 - 11:15 Incline Peak Mount Rose Area Snowpack Observation Evidence of E wind scouring overnight. Mid morning snow surface warming on SE aspect at 9,500'. Fragile cornices linger. Forecaster
12/15/2020 - 13:45 Stevens Peak Carson Pass Area Snowpack Observation Public
12/15/2020 - 14:30 Deep Creek Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Snow pits Roller balls , Guide
Alpenglow Expeditions
12/15/2020 - 16:00 Elephants back Avalanche Observation Public
12/15/2020 - 16:00 Tamarack Lake Mount Rose Area Snowpack Observation ECTP23 on interface between facets and Dec 11 wind slab Was able to squeeze facets and get some cohesion Glop City, USA Public
12/16/2020 - 09:45 Andesite Peak Donner Summit Area Snowpack Observation At least 5 whumpfs while ascending through this open area. 1 cm thick surface melt-freeze crust. 2mm thick surface melt-freeze crust. Signs of minor E wind scouring on ridgetop. Forecaster
12/16/2020 - 11:00 Meadow Below Andesite Peak Donner Summit Area Snowpack Observation Public
12/16/2020 - 11:00 Stoney Ridge West Shore Area Snowpack Observation Decent coverage in the Stoney Ridge area, but there are still lots of large rocks present. Lower elevation snowpit. You can see the 2 crusts in the pit wall. the worriesome weak layer is below the lower crust. Forecaster

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