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. Please send us your observations using the buttons below.

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
Bronco Chutes Mount Rose Area Avalanche Observation 12/31/2016 - 09:30 Public
Castle Peak Donner Summit Area Snowpack Observation 12/30/2016 - 12:00 Minor snow transport off peak with limited available snow. 7900' in Round Valley-up to 1cm+ surface hoar. Forecaster
Lincoln Ridge Yuba Pass Area Snowpack Observation 12/30/2016 - 12:00 Forecaster
East Side of the North Bowl of Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation 12/30/2016 - 11:30 Public
National Geographic Bowl Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation 12/30/2016 - 10:30 Guide
Alpenglow Expeditions
below Castle Peak Donner Summit Area Snowpack Observation 12/30/2016 - 07:00 Professional Observer
Crater Lake Bowl Carson Pass Area Snowpack Observation 12/29/2016 - 13:00 Recent avalanche in center of photo. Warming related avalanche activity, wet loose off slopes on left and right, and likely cornice break at top. Professional Observer
Polaris Point Blackwood Canyon or Ward Canyon Area Snowpack Observation 12/29/2016 - 11:00 20161229 Polaris Point, CA Buried surface hoar layer above the 12/15 NCF's. Close up of the buried surface hoar. Forecaster
above old ASI Donner Summit Area Snowpack Observation 12/28/2016 - 15:00 Guide
Alpenglow Expeditions
Tamarack Peak Mount Rose Area Snowpack Observation 12/28/2016 - 12:30 Several large cornice drops off of East Ridge into wind loaded terrain produced no results. Forecaster
Above Crater lake, Red Lake Pk Carson Pass Area Avalanche Observation 12/27/2016 - 23:30 The snow on bed where failure occured. Public
Central Sierra Snow Laboratory Donner Summit Area Snowpack Observation 12/27/2016 - 14:01 Professional Observer
Mt. Rose Meadows South Mount Rose Area Snowpack Observation 12/27/2016 - 13:00 Public
Ralston Bowl Desolation Wilderness Area (including Emerald Bay) Snowpack Observation 12/27/2016 - 13:00 Soft surface snow remains available for wind transport, especially in sun protected areas. South facing slope showing evidence of previous wet loose activity. Professional Observer
Squaw Ridge Carson Pass Area Snowpack Observation 12/27/2016 - 12:00 Professional Observer


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