Please remember that these observations indicate what was going on in the snowpack at a single point in time and space. They may not represent conditions where you are or where you plan to be. They also come from a variety of sources. SAC cannot vouch for the quality or accuracy of any observations that come from the general public. Some of these may be professional quality observations; some may not. Please use observations listed on this page as part of your information gathering process, but as always don't make decisions based on a single piece of information.

If you are looking for more information on how to understand the information on this page, all of the pit data graphs and stability tests are part of what is presented in a Level II avalanche class that follows the American Avalanche Association (AAA) or American Institute for Avalanche Research and Education (AIARE) curriculum guidelines. All of the coding and abbreviations for data presented follows the publication Snow, Weather, and Avalanches: Observational Guidelines for Avalanche Programs in the United States (SWAG) which is the standard for all professional avalanche programs in the US. An electronic copy is available here. Most of what you are looking for is in Chapter 2 and Appendix F part 1. We use a program called SnowPilot to create the snowpit graphs. It is available as an online tool or as a downloadable program at This website also has a quick video and user guide on how to use create snowpits. Please send us your observations using the buttons below.

Date and time of observation or avalanche occurrence Location Region Observation Type Photos Videos Observation made by
12/01/2017 - 12:00 Tamarack Peak Mount Rose Area Snowpack Observation Protected treed area with 6-8'' of NSF's on top of P hard rain crust.F hard NSF's, mostly .5mm in size. Forecaster
01/06/2017 - 14:15 Andesite Peak Donner Summit Area Snowpack Observation Settlement crack Forecaster
03/14/2016 - 12:00 Relay Peak Mount Rose Area Avalanche Observation
02/15/2018 - 11:15 Ellis Peak Blackwood Canyon or Ward Canyon Area Snowpack Observation Tale of two aspects - 1.8m deep snowpack on N aspect in the foreground and obvoiusly thin snowpack on solar aspects in the background.Wind effected snow surface below treeline on NNW aspect.Minor, inconsequential wind slab noted in near treeline terrain. Forecaster
11/13/2017 - 13:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Fairly thin snowcover on N aspect at 7,800'. Anchors negated.Deepening snowcover on N aspect at 8,000'. Anchors negated. Forecaster
01/23/2018 - 11:00 Lincoln Ridge Yuba Pass Area Snowpack Observation False color image showing small skier triggered cracking due to the surface hoar failure in an area where the 4cm of snow above the surface hoar was slightly denser. N aspect 7600 ft. Wind scoured surfaces along the ridgeline at 7800 ft. Forecaster
01/10/2018 - 12:00 East Ridge Tamarack Peak Mount Rose Area Snowpack Observation ECTP-11 down 1' on facet layer.  9200', N aspect, below treeline terrain.Snowpack layering at 9400' on N aspect.  18'' of snow, with a crust/facet combo below.Facets at 9400' were dry to moist. Forecaster
01/08/2016 - 11:00 Andesite Ridge Donner Summit Area Snowpack Observation , , Forecaster
01/27/2018 - 10:00 Chickadee Ridge Mount Rose Area Snowpack Observation Blowing snow near treeline.More blowing snow near treeline.Test slope wind slab failure 10' wide near noted lat/long.Some of the wind slab cracking giving clues to potential instability. Forecaster
11/28/2016 - 12:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation , Forecaster
01/11/2016 - 12:00 Deep Creek Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Forecaster
12/28/2015 - 11:00 Trimmer Peak Luther Pass Area (including Job and Freel) Snowpack Observation Forecaster
12/20/2017 - 11:45 Chickadee Ridge Mount Rose Area Snowpack Observation Small wind slabs reactive to ski cuts. N aspect ~9,100'.Small wind slabs failed easily on test slopes. N aspect ~9,100'. Forecaster
03/14/2017 - 13:00 West Ridge of Mt. Tallac Desolation Wilderness Area (including Emerald Bay) Avalanche Observation
Loose wet avalanche size D1.5-D2 triggered by natural cornice collapse.
01/20/2017 - 15:45 Andesite Peak Donner Summit Area Avalanche Observation
D2 Wind slab avalanche triggered by a small cornice piece
Small avalanche triggered by a larger piece of cornice
Cracking in the storm snow on in below treeline terrain


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