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
01/29/2016 - 11:00 Andesite Ridge Donner Summit Area Snowpack Observation Forecaster
12/08/2015 - 12:30 Tamarack Peak Mount Rose Area Snowpack Observation Forecaster
01/02/2016 - 10:15 Carpenter Ridge Independence Lake Area Avalanche Observation
02/12/2018 - 11:00 Slab Cliffs Mount Rose Area Snowpack Observation  Skier triggered cracking on a very small, isolated wind slab on a WNW aspect at 9700 ft. Light wind scouring from recent NE winds. Forecaster
02/03/2016 - 10:00 Andesite Peak Donner Summit Area Snowpack Observation Forecaster
03/25/2016 - 11:45 Emerald Bay Chute Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Forecaster
12/13/2015 - 11:00 Deep Creek Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation
12/24/2016 - 11:30 Andesite Peak Donner Summit Area Avalanche Observation
02/03/2017 - 11:00 East Ridge Tamarack Peak Mount Rose Area Snowpack Observation Triggered wind slab at 9100', N aspect, 6-8'' deep. Debris from intentionally skier triggered wind slab.Triggered wind slab, N aspect, 9100', 8-12'' deep.ECTP-11.  14'' deep, N aspect, 9200' in wind loaded location. 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.
02/23/2017 - 13:00 Cinder Cone Sawtooth Ridge to Tahoe City Snowpack Observation ECTN results at two locations in the pit. The rain crust from the start of the storm is at the bottom and the snow below that was still wet. NW aspect at 7500 ft. Small Loose dry snow sluff on a sheltered NNW aspect at 7300 ft. Forecaster
04/05/2016 - 11:30 Rubicon Peak West Shore Area Snowpack Observation Forecaster
02/10/2017 - 12:00 Andesite Peak Donner Summit Area Snowpack Observation Cornice kicks on test slopes produced limited loose snow with no signs of slab propagation.2x ECTN's on wind slabs off summit.  8200', E aspect. Forecaster
03/24/2017 - 11:30 Incline Lake Peak Mount Rose Area Snowpack Observation Snow and wind starting in the morning hours.3-5'' wind slabs formed off of summit ridge on N aspects. Forecaster
12/22/2015 - 11:00 Andesite Ridge Donner Summit Area Snowpack Observation Forecaster


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