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
12/17/2021 - 14:00
Snowpack Observation 		Johnson Canyon
Donner Summit Area 		10mm Surface Hoar on N-NE-E at 6,900' 3-4mm SH at 6,300' Guide
West Wind Collecti
12/17/2021 - 12:30
Snowpack Observation 		North Side of Kingsbury Grade
East Shore Area 		Public
12/17/2021 - 12:00
Snowpack Observation 		Tram Ridge
Cabin Creek, Deep Creek, or Pole Creek Area 		1-2mm Surface Hoar Guide
Alpenglow Expeditio
12/17/2021 - 12:00
Snowpack Observation 		Tamarack Peak
Mount Rose Area 		Recent NE wind texture Snowpit tests on a 2.3m snowpack Signs of settlement in the new snow. Cornice pieces dropped onto a wind-loaded test slope did not trigger cracking or other signs of instability. Forecaster
12/17/2021 - 09:00
Snowpack Observation 		Incline Peak
Mount Rose Area 		Public
12/16/2021 - 14:30
Snowpack Observation 		SE Slide Path on Waterhouse Peak
Luther Pass Area (including Job and Freel) 		Public
12/16/2021 - 14:02
Snowpack Observation 		Andesite Ridge
Donner Summit Area 		Public
12/16/2021 - 13:23
Snowpack Observation 		Frog Lake area
Carson Pass Area 		Wind features present at the trailhead. Trailhead two weeks ago. Small cornice development. (before ski cut). Cornice after ski cut. Wind effected snow below tree line. Pit profile. Compressible snow within Nov. 9th layer. Clean planar results on dense layer within the top 20cm. Professional Observer
12/16/2021 - 13:00
Snowpack Observation 		Poulsen's Peak
Cabin Creek, Deep Creek, or Pole Creek Area 		Sastrugi on S facing ridgeline from SW wind Small natural wind slab/cornice break on NE aspect at summit of Poulsen's peak Roller balls on W aspect below 7000'. Mostly skier triggered, some natural coming off of exposed rock. Guide
Alpenglow Expeditio
12/16/2021 - 12:30
Snowpack Observation 		Hidden Peak
West Shore Area 		Small cracking in wind loaded terrain Wind scoured snow near ridgelines Small 3-4'' wind slab failures Small wind features forming on ridgelines Forecaster
12/16/2021 - 12:00
Avalanche Observation 		Shirley Canyon
Cabin Creek, Deep Creek, or Pole Creek Area 		Public
12/16/2021 - 02:26
Avalanche Observation 		Above Snow Lake
Desolation Wilderness Area (including Emerald Bay) 		Public
12/15/2021 - 14:00
Snowpack Observation 		Castle Valley Meadow
Donner Summit Area 		Guide
Alpenglow Expeditio
12/15/2021 - 13:00
Avalanche Observation 		Castle / Andesite
Donner Summit Area 		Small natural wind slab avalanche near Castle Peak Public
12/15/2021 - 13:00
Snowpack Observation 		Castle peak
Donner Summit Area 		Public

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