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 button above.
Date and time of observation or avalanche occurrence Location Region Observation Type Photos Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
12/03/2019 - 14:00 Red Lake peak Trailhead Carson Pass Area Snowpack Observation CT RP results Layer ID Snow bombs Sky cover Guide
Alpine Skills International (ASI)
12/03/2019 - 13:00 Castle Peak Donner Summit Area Avalanche Observation Forecaster
12/03/2019 - 12:30 Castle Peak Donner Summit Area Snowpack Observation Good snowcover at 8,000'. Snowpack height 1-1.5m on N aspect. Settlement around trees at ~8,600'. Wet snow with tree dripping and bombing at ~7,900' on W aspect. Wet surface snow, but supportable and over 1m deep at the start of the Castle Rd (~7,300'). Forecaster
12/03/2019 - 02:00 East Shoulder of Mount Rose Mount Rose Area Snowpack Observation Roller ball activity, SE slope @ 8500' Public
12/02/2019 - 14:00 Powderhouse Luther Pass Area (including Job and Freel) Snowpack Observation Snow covered trees at about 8000 feet on Luther Pass. Poor photo, but the heavy new snow cracked as I undercut it with my ski. Over 9000 foot summit area had obvious wind features. This small cornice broke easily as I skinned near it. Snow depths at and just below summit ranged from 100 - 115 cms Professional Observer
12/02/2019 - 11:30 East Ridge Tamarack Peak Mount Rose Area Avalanche Observation settlement crack natural avalanche reactive cornice and wind slab Professional Observer
12/01/2019 - 16:00 East Ridge of Tamarack Peak Mount Rose Area Snowpack Observation Public
12/01/2019 - 13:00 Incline lake Mount Rose Area Snowpack Observation Public
12/01/2019 - 12:00 Proletariat (southern flank of Tamarack) Mount Rose Area Snowpack Observation Public
12/01/2019 - 11:00 Andesite Peak Mount Rose Area Snowpack Observation Small cornice kicks on test slopes did not initiate any avalanches. HS=95cm Some starting zones not filled in yet with rocky terrain. Forecaster
12/01/2019 - 10:00 West Grouse Blackwood Canyon or Ward Canyon Area Snowpack Observation Public
11/30/2019 - 15:45 Tahoma West Shore Area Snowpack Observation Public
11/30/2019 - 13:30 Hour glass Mount Rose Area Snowpack Observation Guide
Alpine Skills International (ASI)
11/30/2019 - 12:15 Elephant's Back Carson Pass Area Snowpack Observation Cracking near cornice features Still very thin and rocky in this north facing 9000 foot elevation terrain. Looking at the base of a 75cm snow pack. An ECTP 13 that broke at the ground. This followed a CTM 15 (SC) in same location. Professional Observer
11/30/2019 - 10:00 Grouse Rock Snowpack Observation Public


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