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 http://www.snowpilot.org/. 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 Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
02/08/2019 - 11:00 Mt. Judah Donner Summit Area Avalanche Observation Public
02/02/2019 - 02:30 .5 km west of the grill/Tom’s meadow Independence Lake Area Avalanche Observation Public
12/25/2018 - 11:30 1.2 miles west of white rock lake Independence Lake Area Snowpack Observation Public
01/16/2019 - 13:00 2.5k west of peak 8740 Independence Lake Area Avalanche Observation Test slope avalanche on small wind loaded cornice Shooting crack from snowmobile ski tip Shooting crack from snowmobile track Public
02/12/2019 - 10:45 above Crystal Bay Mount Rose Area Snowpack Observation Guide
Donner Summit Avalanche Seminars
01/02/2019 - 12:00 Above Tom's Valley Independence Lake Area Snowpack Observation Exposed, snomo ski breakable rain crust on ridgetop at ~8,100'. Old fracture failing down to the 12/22 rain crust. Faceted snow at this layer interface still shows problematic failure in snowpit tests. Forecaster
02/12/2019 - 10:30 Across from River Ranch Sawtooth Ridge to Tahoe City Avalanche Observation Public
12/18/2018 - 15:00 After Party Independence Lake Area Avalanche Observation Public
12/14/2018 - 10:30 Anderson Ridge Donner Summit Area Snowpack Observation High winds but minimal local ridge top transport wind scoured and side loading below the ridge thin and non-reactive wind loading at 10:30a Public
01/08/2019 - 15:00 Andesite Peak Donner Summit Area Avalanche Observation Public
12/22/2018 - 15:00 Andesite Peak Donner Summit Area Snowpack Observation Educator
Tahoe Mountain School
02/12/2019 - 11:45 Andesite Peak Donner Summit Area Snowpack Observation Moderate amounts of blowing snow noted as we approached near treeline terrain. Skin track refill in above treeline terrain. Skier triggered shooting crack 20 ft long and 1 ft deep in wind slab on test slope. Another party's snowboard cut did not produce results on this wind loaded slope. Forecaster
02/13/2019 - 11:00 Andesite Peak Donner Summit Area Avalanche Observation Long shooting crack on storm snow instability. Natural avalanche that failed early this morning on a storm snow weakness at the beginning of the storm snow Forecaster
12/29/2018 - 14:15 Andesite Peak Donner Summit Area Snowpack Observation Visual outline of the Snowpack on a West Aspect Near Treeline @ 7600' Educator
Tahoe Mountain School
02/10/2019 - 02:00 Andesite Peak Donner Summit Area Avalanche Observation Forecaster

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