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
12/17/2020 - 08:00
Avalanche Observation 		Billy's Peak
Cabin Creek, Deep Creek, or Pole Creek Area 		Forecaster
12/16/2020 - 14:00
Snowpack Observation 		Ellis Peak
West Shore Area 		Guide
Blackbird Mountain Guid
12/16/2020 - 14:00
Snowpack Observation 		Donner Rest Area
Donner Summit Area 		Public
12/16/2020 - 11:00
Snowpack Observation 		Meadow Below Andesite Peak
Donner Summit Area 		Public
12/16/2020 - 11:00
Snowpack Observation 		Stoney Ridge
West Shore Area 		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
12/16/2020 - 09:45
Snowpack Observation 		Andesite Peak
Donner Summit Area 		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
12/15/2020 - 16:00
Snowpack Observation 		Tamarack Lake
Mount Rose Area 		ECTP23 on interface between facets and Dec 11 wind slab Was able to squeeze facets and get some cohesion Glop City, USA Public
12/15/2020 - 14:30
Snowpack Observation 		Deep Creek
Cabin Creek, Deep Creek, or Pole Creek Area 		Snow pits Roller balls , Guide
Alpenglow Expeditio
12/15/2020 - 13:45
Snowpack Observation 		Stevens Peak
Carson Pass Area 		Public
12/15/2020 - 11:15
Snowpack Observation 		Incline Peak
Mount Rose Area 		Evidence of E wind scouring overnight. Mid morning snow surface warming on SE aspect at 9,500'. Fragile cornices linger. Forecaster
12/15/2020 - 11:00
Snowpack Observation 		Mt Judah Sunflower Ridge
Donner Summit Area 		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 - 09:15
Snowpack Observation 		Above long creek
Yuba Pass Area 		EctP7down35 cm. On dec 11 layer December 11 facet layer Snow pit Public
12/14/2020 - 14:30
Snowpack Observation 		Ellis Peak
Blackwood Canyon or Ward Canyon Area 		Public
12/14/2020 - 12:00
Snowpack Observation 		Lower Round Top
Carson Pass Area 		Professional Observer
12/14/2020 - 11:00
Snowpack Observation 		Silver Peak
Cabin Creek, Deep Creek, or Pole Creek Area 		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

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