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
12/26/2015 - 10:30 Incline Lake Peak Mount Rose Area Avalanche Observation
01/05/2016 - 11:15 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation
03/15/2016 - 13:00 Donner Peak Donner Summit Area Avalanche Observation
Tahoe Mountain School
01/03/2017 - 13:25 rose knob Mount Rose Area Avalanche Observation Public
01/27/2018 - 08:00 Midway between Lincoln and Anderson Peak Donner Summit Area Avalanche Observation
Small, wide slab avalanche just below the Crest
Same slide from skier's left edge
01/17/2016 - 23:30 Crater Lake Road Carson Pass Area Avalanche Observation
Professional Observer
01/29/2016 - 22:43 Negro Canyon Donner Summit Area Avalanche Observation
03/01/2017 - 14:00 above buck lake West Shore Area Avalanche Observation wind loaded slab, wind loaded slabs Public
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.
03/15/2016 - 12:00 South Face of Round Top Carson Pass Area Avalanche Observation
Professional Observer
11/11/2015 - 11:30 Elephants Back NE face Carson Pass Area Avalanche Observation
02/19/2017 - 13:00 Angora Echo Summit Area Avalanche Observation Public
01/24/2016 - 14:45 Andesite Peak Donner Summit Area Avalanche Observation Test slope failure on Andesite Peak Educator
Tahoe Mountain School
02/26/2017 - 11:00 Carpenter Ridge Independence Lake Area Avalanche Observation
Test slope cracking of easy to trigger but very shallow wind slab.
Propagation up to 30' with shallow wind slab.
Triggered wind slab up to 4 inches thick on top of older wind slab from 24+ previous.
Some wind transport refill of skin track after 3 hrs, well below treeline on Carpenter Rd on N aspect at 8,040'.
02/20/2018 - 12:00 Black Butte Carson Pass Area Snowpack Observation Professional Observer


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