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. This program is available as a free download at A video on how to download and use this program is available here.

Location Region Observation Type Date and time of observation or avalanche occurrence Avalanche observation video Avalanche photos Snowpit videos (tests, etc) Snowpack photos Snowpit or crown profile photo or graph Observation made by
Becker Peak Echo Summit Area Snowpack Observation 03/01/2017 - 14:30 Large intentionally skier-triggered cornice collapse. The impact and weight of the cornice did not produce cracking in the wind-loaded test slope. Ski poles are in the photo for scale. Runnels indicating warming in the snowpack on a S aspect. Small roller balls on a S aspect above Echo Lake near a cliff band. Forecaster
above buck lake West Shore Area Avalanche Observation 03/01/2017 - 14:00 wind loaded slab wind loaded slabs Public
Mt. Tallac Desolation Wilderness Area (including Emerald Bay) Snowpack Observation 03/01/2017 - 12:00 Recent natural roller ball activity on SE aspect around 8,000'. Some from today, some from previous days. Forecaster
Ebbetts Pass Ebbetts Pass Area Snowpack Observation 02/28/2017 - 12:00 Professional Observer
Negro Canyon Donner Summit Area Snowpack Observation 02/28/2017 - 09:00 Surface hoar on a N-NW aspect at 9am @ 7200 ft. Ski kicks triggered failures in the cornices but the cornice pieces did not trigger wind slab failures. Forecaster
Flagpole Peak Echo Summit Area Snowpack Observation 02/27/2017 - 12:00 Late morning view of south east face of Flagpole peak, showing previous natural slide activity. Winds were transporting snow and largely covering up the skin track between laps. A natural loose dry avalanche on a steep slope just below the summit ridge. Evidence of wind altered snow just below the summit. Sastrugi on a low elevation ridge in early afternoon. Professional Observer
Peak 9269' SE Aspect West Shore Area Avalanche Observation 02/27/2017 - 10:00 Public
Peak 9269' West Shore Area Avalanche Observation 02/27/2017 - 09:00 E to SE aspect, 9.000'Skin track barely visible exiting upper climbers right just below crown.Skin track barely visible exiting upper climbers right just below crown.Debris piles. Forecaster
Shallenberger Ridge Donner Summit Area Snowpack Observation 02/26/2017 - 13:00 3-5mm surface hoar, 7k', North aspect Guide Alpenglow Expeditions
Rose Knob / Junior Knob Mount Rose Area Avalanche Observation 02/26/2017 - 12:37 Public
Indian Valley Ebbetts Pass Area Snowpack Observation 02/26/2017 - 12:00 Professional Observer
Echo Peak Echo Summit Area Avalanche Observation 02/26/2017 - 11:15 Small part of the cornice broke off  - far upper left of photo.The debris made it over the next rollover.  Avalanche path.  I had noticed tracks in this area on my hike up. Public
Carpenter Ridge Independence Lake Area Avalanche Observation 02/26/2017 - 11:00 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'. Forecaster
Incline peak ENE bowl approx 9000 ft Mount Rose Area Avalanche Observation 02/25/2017 - 13:30 Public
Andesite Peak Donner Summit Area Snowpack Observation 02/25/2017 - 13:04 Guide Tahoe Mountain School