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
12/10/2017 - 12:10 Castle Pass Donner Summit Area Snowpack Observation Educator
Tahoe Mountain School
01/17/2016 - 14:30 Above Highway Chutes Mount Rose Area Snowpack Observation Educator
Sierra Nevada College
01/04/2017 - 17:00 Jakes Peak West Shore Area Avalanche Observation
Wind Slab Avalanche, 9100', NE aspect, 38 degrees.
01/27/2016 - 13:40 Rubicon West Shore Area Snowpack Observation Forecaster
11/15/2017 - 12:00 East Ridge of Relay Pk Mount Rose Area Snowpack Observation Snowpit location as noted on map. 15 in of total snow depth. Forecaster
03/20/2016 - 09:45 Rubicon Peak West Shore Area Snowpack Observation Forecaster
11/26/2016 - 11:00 Tamarack Peak Mount Rose Area Snowpack Observation Forecaster
01/13/2016 - 11:30 Bards Bowl Bear Valley Area Avalanche Observation
03/12/2017 - 11:00 Slide Mountain Mount Rose Area Snowpack Observation Ski and boot supportable snow on solar aspects at 11:30am.Rough snow texture from previous wind and avalanche debris. Forecaster
02/18/2018 - 12:00 Rubicon Peak West Shore Area Snowpack Observation Wind scoured N aspects at 9000'. Forecaster
12/20/2016 - 10:15 Tamarack Peak Mount Rose Area Snowpack Observation Forecaster
04/08/2017 - 12:00 Peak 9,310' Desolation Wilderness Area (including Emerald Bay) Avalanche Observation
Photo take from CHP helo, courtsey of Matt Calcutt.
Photo taken from summit of Peak 9,269, just S of Rubicon Peak.
01/07/2017 - 11:00 East Ridge Tamarack Peak Mount Rose Area Avalanche Observation
Large cornices with a collapsed section and wind slab avalanche below.
Large cornices with a collapsed section and wind slab avalanche below.
Debris below wind slab
Another cornice collapse
False color image to show debris downslope.
01/14/2016 - 14:30 Donner Peak Donner Summit Area Avalanche Observation
03/08/2018 - 14:00 Mt. Lola Independence Lake Area Snowpack Observation At 8400', N aspect, HS=340cm, facet layer buried 150cm down. Cold unconsolidated snow existed at 8400' on N aspects. Forecaster


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