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
02/13/2019 - 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
12/22/2018 - 15:00 Andesite Peak Donner Summit Area Snowpack Observation Educator
Tahoe Mountain School
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
12/21/2018 - 11:00 Andesite Peak Donner Summit Area Snowpack Observation Wind loaded test slopes showing unreactive slabs. Minor cracking on old/new snow interface while breaking trail. Skier triggered rollerballs after about 2 hrs of very light rain. Forecaster
02/10/2019 - 12:30 Andesite Ridge Donner Summit Area Snowpack Observation Active wind-loading on Donner Summit Small skier triggered cornice failure causing a loose snow sluff on a test slope. Skin track refilled by wind loading. ECTN on the flank of a natural avalanche that occurred last night. Forecaster
01/07/2019 - 14:00 Andesite Ridge Donner Summit Area Snowpack Observation Educator
Donner Summit Avalanche Seminars
01/22/2019 - 11:45 Angora Peak Echo Summit Area Snowpack Observation Surface hoar present from between 7000 - 8400 at all aspects in the morning. Settlement cone. Ridge just below Angora summit. Professional Observer
12/28/2018 - 12:00 Angora Peak Echo Summit Area Snowpack Observation Professional Observer
01/30/2019 - 12:00 Angora Peak Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Professional Observer
01/03/2019 - 10:00 Angora Peak Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Public
12/14/2018 - 11:00 Approach to Meiss Carson Pass Area Snowpack Observation Professional Observer
01/20/2019 - 02:30 ASI windlip Donner Summit Area Snowpack Observation Public
01/23/2019 - 12:30 Back side of Houghton Mount Rose Area Snowpack Observation Public
02/03/2019 - 13:45 Bear Valley Via Meadow Lake Rd Independence Lake Area Snowpack Observation Public
02/01/2019 - 11:30 Becker Peak Echo Summit Area Snowpack Observation Public

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