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 Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
04/09/2017 - 10:45 Tram Ridge Squaw Snowpack Observation surface hoarhand shear Guide
Alpenglow Expeditions
01/24/2016 - 13:15 Mt. Baldy, north shore Lake Tahoe Snowpack Observation Public
03/06/2018 - 15:45 Winter’s Creek Gully, Carson Range Avalanche Observation Public
03/05/2017 - 13:00 Hirschdale Snowpack Observation Ski kick triggered wind slab both failures were approximately 20cm deep.Debris from wind loaded test slope that failed Public
01/31/2016 - 12:26 Top of Jake's Peak Avalanche Observation Public
03/04/2017 - 14:10 Wheeler Ridge Bear Valley Area Avalanche Observation
01/16/2017 - 13:20 Poison Canyon Bear Valley Area Snowpack Observation Public
02/03/2018 - 13:30 Underwood Bowl Bear Valley Area Snowpack Observation 2 to 5 cm (1 to 2 in) of corn snow on a S aspect at 3:00 pm.Patchy snow cover on SE-S-SW aspects in the area. Recent cornice collapses and good snow cover on NE aspects.Snow cover on N aspects and lack of snow cover on S aspects in the distance Forecaster
01/13/2016 - 11:30 Bards Bowl Bear Valley Area Avalanche Observation
02/20/2016 - 14:00 Horse Canyon Bear Valley Area Snowpack Observation Public
01/10/2018 - 15:30 Mosquito Lake Bear Valley Area Snowpack Observation Public
01/07/2018 - 14:45 Bear Valley Bear Valley Area Snowpack Observation Public
02/04/2018 - 11:00 Kings Realm Bear Valley Area Snowpack Observation Looking at S facing slopes across Mokelumne Canyon. N facing slopes in Kings Realm in the foreground.2 to 5 cm (1 to 2 in) of corn on a S aspect at 8000 ft. by 10:30 amS aspect on the lookers right and N aspect on the left. Photo is from standing at 8000 ft. on the ridge. Forecaster
02/20/2017 - 11:32 north facing slope adjacent to Lake Alpine Bear Valley Area Snowpack Observation Public
02/13/2017 - 09:45 Poison Point Bear Valley Area Snowpack Observation Wind scoured snow surface along ridge between Bard's Bowl and Poison Point. Forecaster


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