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
02/18/2017 - 12:30 Stevens Peak Carson Pass Area Snowpack Observation mall natural avalanche on east facing cross loaded slope. Professional Observer
02/21/2017 - 14:00 Hidden Peak West Shore Area Snowpack Observation Shooting cracks on a wind-loaded test slope @ 8600 ft. ECTN 15 at the upper density change in the storm snowECTN 21 at the lower density change in the storm snow Forecaster
01/18/2016 - 13:00 Blue Lakes Carson Pass Area Snowpack Observation Professional Observer
02/24/2017 - 13:30 Negro Canyon Donner Summit Area Snowpack Observation Ski cut triggered loose dry sluff on a N aspect at ~7500 ft.Cornice failure caused by ski kicks on a ENE aspect at 7200 ft. Forecaster
02/27/2017 - 12:00 Flagpole Peak Echo Summit Area Snowpack Observation 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
02/01/2016 - 11:30 Tamarack Peak Mount Rose Area Snowpack Observation scouring on a NE, exposed ridgesmall shooting crack during a kick turn Public
03/13/2017 - 11:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Runnels creating less than smooth snow surfaces on ESE aspects (photo left), transitioning to smooth on NE aspects (photo right).Decent supportability in open areas at 9:45am.Cracking of weak melt freeze crust on nil aspect under forest canopy.Poor supportability of surface melt-freeze on N aspect at 6,700' at 9:30am. Forecaster
02/06/2016 - 11:30 Rubicon Peak West Shore Area Snowpack Observation Public
03/18/2017 - 14:00 Relay Peak Mount Rose Area Snowpack Observation Public
02/11/2016 - 12:30 Cathedral Bowl Tallac Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Public
02/19/2016 - 08:25 Crystal Bay (Stateline ridge), NV Mount Rose Area Snowpack Observation , Educator
Donner Summit Avalanche Seminars
03/29/2017 - 11:30 South Side Castle Peak Donner Summit Area Snowpack Observation Educator
Sierra Nevada College
02/23/2016 - 12:30 Lincoln Ridge Yuba Pass Area Snowpack Observation Forecaster
04/05/2017 - 11:00 S. Maggie's Peak Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Large Glide Cracks on S. Maggie's Public
03/02/2016 - 13:30 Third Creek Mount Rose Area Snowpack Observation Forecaster


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