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
02/16/2019 - 22:00 Powderhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation Graupel was very widespread at Powerhouse this afternoon. Near the summit a fully extended pole could easily be buried up to the handle. Stormy day with strong winds near the ridges. Professional Observer
12/03/2018 - 12:00 Red Lake Peak Carson Pass Area Snowpack Observation Surface Hoar growing on flat terrain near base of Red Lake Peak. Previous skier triggered slide in sun in middle of photo. Natural slide on left of photo and skier triggered slide on far right. Cracking in front of ski tip. Professional Observer
02/14/2019 - 12:00 Elephant's Hump Carson Pass Area Snowpack Observation Professional Observer
02/28/2019 - 13:00 Frog Lake Ridge Carson Pass Area Snowpack Observation Professional Observer
12/17/2018 - 12:00 Round valley Donner Summit Area Snowpack Observation New small cornice broke easily under a ski kick. Wind blown snow texture on NW side of ridge to Castle. On a few steeper switchbacks cracks propagated. Professional Observer
02/17/2019 - 12:00 South Camp Peak East Shore Area Snowpack Observation Professional Observer
04/14/2019 - 14:00 Angora Peak Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Professional Observer
02/09/2019 - 12:00 Horse Meadow Luther Pass Area (including Job and Freel) Snowpack Observation Professional Observer
12/11/2018 - 12:00 Thunder Mountain Carson Pass Area Snowpack Observation Professional Observer
01/08/2019 - 12:00 Squaw Ridge Carson Pass Area Snowpack Observation Professional Observer
03/29/2019 - 12:00 Indian Valley Ebbetts Pass Area Avalanche Observation Professional Observer
02/26/2019 - 14:30 Powderhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation This wind feature is notable because it is at the base of Powderhouse only a couple hundred feet from the road. Large potentially dangerous tree bombs were widespread. This one is sitting directly on the existing skin track. After kicking on a wind feature over a tree well there was minor slab failure. Professional Observer
02/16/2019 - 12:00 Blue Lakes Rd Snowpack Observation Professional Observer
01/15/2019 - 13:00 Scott Creek Blackwood Canyon or Ward Canyon Area Snowpack Observation Professional Observer
01/16/2019 - 13:00 near Frog Lake Carson Pass Area Avalanche Observation Crown at midpoint of avalanche. Lowest portion of the debris. Looking up towards the start zone. Snow pushed up against tree by slide. Looking down from where the cornice broke that triggered this slide. Profile of avalanche crown. Facets are by fingers of glove. Shovel blade is roughly at bed surface. Professional Observer


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