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
02/26/2018 - 11:00 Frog Lake Ridge Carson Pass Area Snowpack Observation Professional Observer
02/26/2018 - 11:00 Grouse Rock Blackwood Canyon or Ward Canyon Area Avalanche Observation Forecaster
02/26/2018 - 09:00 Donner Pass/Andesite Pk Donner Summit Area Avalanche Observation Guide
Donner Summit Avalanche Seminars
02/25/2018 - 21:00 Becker Ridge Snowpack Observation Thin coverage on the ridge near 8000 ft. Looking from Becker Peak to Talking Mountain. Well developed facets found about 25 cm down in the snowpack on a N aspect at 8000 ft. 2mm grid in the background Forecaster
02/25/2018 - 14:00 Meiss Carson Pass Area Snowpack Observation Professional Observer
02/25/2018 - 12:45 Castle Ridge Donner Summit Area Snowpack Observation South face of Basin Peak Pit location Guide
Tahoe Mountain School
02/25/2018 - 12:30 Castle Ridge Donner Summit Area Snowpack Observation Near ridge line on NW aspect. Cohesive snow around a tree well.  Professional Observer
02/25/2018 - 11:00 East Ridge Relay Peak Mount Rose Area Snowpack Observation Near surface facets buried under recent storm snow at pit location.  N aspect, 9600', NTL terrain. Wind textured snow surface at 9600', N aspect, just off ridgeline. E aspect wind effected snow at 9600'. Forecaster
02/25/2018 - 08:30 Water house Peak Luther Pass Area (including Job and Freel) Snowpack Observation Public
02/24/2018 - 17:30 Andesite Ridge Donner Summit Area Snowpack Observation Guide
Tahoe Mountain School
02/24/2018 - 16:15 Andesite Peak Donner Summit Area Snowpack Observation Shooting crack on an E facing wind loaded test slope @ 7900 ft. after a few hard stomps The same test slope after a few more stomps. The wind slab slid down the small test slope. Forecaster
02/24/2018 - 13:30 Glades east of Ralston Peak Desolation Wilderness Area (including Emerald Bay) Avalanche Observation Public
02/24/2018 - 12:39 Thumb rock Donner Summit Area Snowpack Observation Public
02/24/2018 - 12:00 Trimmer Peak Luther Pass Area (including Job and Freel) Snowpack Observation 10' shooting cracks, while making switchback. shooting cracks Public
02/24/2018 - 10:00 Incline Lake Peak Mount Rose Area Snowpack Observation Potentially problematic interface of recent storm snow on top of old near surface facets as seen in the pit wall. Newly formed cornices, easy to intentionally collapse onto small test slopes below. Newly formed wind slab fractured by a ski cut on this test slope. Moderate amounts of blowing snow. Forecaster


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