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. BAC 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 snowpit 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 two apps - SnowPilot and AvyLab - to create the snowpit graphs. These apps are available as downloads: click here for the free SnowPilot download; for AvyLab, visit Apple's AppStore or the AvyLab website

Locationsort ascending Region Observation Type Date and time of observation or avalanche occurrence Avalanche observation video Avalanche photos Snowpit videos (tests, etc) Snowpack photos Snowpit or crown profile photo or graph Observation made by
Twin Lakes Other Area Snowpack Observation 02/12/2019 - 11:07 Windy Avalanche Specialist
Twin Lakes BWRA Snowpack Observation 02/01/2021 - 16:30 Professional Observer
Twin Lakes Other Area Snowpack Observation 01/09/2022 - 18:31 Avalanche Specialist
Trees 1/4th mile NE of Leavitt Lake BWRA Snowpack Observation 02/20/2017 - 15:30 Public
Treeline near Koenig Lake BWRA Snowpack Observation 01/04/2018 - 14:00 Professional Observer
Test Cornice BWRA Avalanche Observation 01/17/2019 - 14:22 Test Cornice Human Trigger Avalanche Specialist
SW above Leavitt Lake BWRA Snowpack Observation 01/25/2017 - 13:00 Avalanche Specialist
Stanislaus Wall BWRA Avalanche Observation 12/16/2018 - 02:33 Avalanche Specialist
South Peak BWRA Snowpack Observation 12/25/2018 - 14:00 Avalanche Specialist
South Facing Chimney's above Koenig BWRA Snowpack Observation 04/11/2021 - 13:00 Professional Observer
Sonora Snotel BWRA Snowpack Observation 02/23/2019 - 15:03 PST Public
Sonora Pass/Sardine Creek BWRA Snowpack Observation 03/09/2018 - 14:00 Halfway to the ground Sun is gaining intensity Professional Observer
Sonora Pass- Sardine Meadow terrain BWRA Snowpack Observation 04/12/2022 - 16:00 Avalanche Specialist
Sonora Pass- Sardine can Wall BWRA Snowpack Observation 04/11/2022 - 16:18 Avalanche Specialist
Sonora Pass, CA BWRA Snowpack Observation 04/06/2017 - 13:42 Weather Forecast Avalanche Specialist


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