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 Videos Observation made by
02/26/2017 - 11:00 Carpenter Ridge Independence Lake Area Avalanche Observation
Test slope cracking of easy to trigger but very shallow wind slab.
Propagation up to 30' with shallow wind slab.
Triggered wind slab up to 4 inches thick on top of older wind slab from 24+ previous.
Some wind transport refill of skin track after 3 hrs, well below treeline on Carpenter Rd on N aspect at 8,040'.
04/15/2017 - 13:00 Mt. Tallac Cross Desolation Wilderness Area (including Emerald Bay) Avalanche Observation Public
03/23/2016 - 12:00 Echo Peak Echo Summit Area Avalanche Observation
11/27/2017 - 12:00 Shoulder of Elephant Back above large shelf Carson Pass Area Avalanche Observation
I was exiting above the rock in the center.
Looking down form where I exited the ridge. Notice the crack
Looking up. The highest part went the farthest, but was mostly sluff
01/07/2018 - 14:25 Proletariat Bowl Skier's Right Mount Rose Area Avalanche Observation Public
01/10/2017 - 11:30 Negro Canyon Donner Summit Area Avalanche Observation
Intentially skier trigger wind slab on small test slope
Wind slab failing within storm snow about 4-6'' above the old snow rain crust interface.
02/07/2017 - 04:00 Frog Lake Cliffs Carson Pass Area Avalanche Observation
01/13/2016 - 23:31 North aspect near Tinker Knob Donner Summit Area Avalanche Observation Public
02/21/2017 - 01:00 Corkscrew slide path Desolation Wilderness Area (including Emerald Bay) Avalanche Observation
Toe of the debris.
Huge blocks in the debris.
Looking up from the highest point of the debris.
Looking down on the debris from higher on the edge of the Corkscrew path.
Professional Observer
03/02/2017 - 13:20 North Bowl Castle Peak Donner Summit Area Avalanche Observation
04/23/2017 - 10:30 South side of Rose Mount Rose Area Avalanche Observation , , , Public
12/18/2016 - 12:00 Red Lake Peak Carson Pass Area Avalanche Observation
12/24/2015 - 14:00 Silver Peak, N Ridge Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation
01/22/2017 - 11:20 Negro Canyon Donner Summit Area Avalanche Observation
Witnessed remote trigger wind slab avalanche/test slope failure from ridgetop (SE aspect, 6,880')..
Small natural wind slab avalanche futher up ridge from remote trigger test slope failure (ESE aspect, 7,000').
Signs of recent natural cornice collapse and subtle evidence of a mostly refilled crown line (NE aspect, 7,240')
Rapid storm snow settlement at 6,500.
02/25/2017 - 13:30 Incline peak ENE bowl approx 9000 ft Mount Rose Area Avalanche Observation


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