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
01/05/2017 - 15:21 Main fork and S. fork of Davis Creek Mount Rose Area Avalanche Observation Public
01/21/2017 - 13:05 Lower Manzanita Bowl Mount Rose Area Avalanche Observation
Storm slab on side loaded small ridge top. Search and Rescue in background
01/25/2017 - 13:02 Porcupine Ridge East Shore Area Avalanche Observation
02/05/2017 - 09:00 Jakes Peak Desolation Wilderness Area (including Emerald Bay) Avalanche Observation
02/11/2017 - 11:00 Davis Creek Main Stem Mount Rose Area Avalanche Observation
The starting zone is behind skier and along side loaded ridge. Crown was covered by later wind loading
As the original slab loaded steep sided ravine below it morphed into a wet slide that scoured down to old snow bed surface
After dropping approximately 500 feet vert the wet slide scoured deeper leaving luge runs made of clear rink ice
After running a 1000+ vert feet some debris was left behind in the less steep areas
The person in this photo gives the reader an idea of the immensity and power of this slide
At a curve in the ravine the slide cut down to bare ground on the outside of the turn
The deposition at the bottom left 10 foot scoured walls and an acre of debris
Skiers give the slide a little more perspective
02/18/2017 - 03:30 Frog Lake Ridge above Red lake Carson Pass Area Avalanche Observation
Crown and bed surface
Skier with debris field.
01/15/2016 - 13:00 Donner Peak Donner Summit Area Avalanche Observation
02/22/2017 - 03:10 Little Gold Lake Outside of the Forecast Area Avalanche Observation Lakes Basin
01/18/2016 - 07:00 Castle Peak (SnoMo Bowl) Donner Summit Area Avalanche Observation
01/27/2018 - 09:05 North Castle Peak Donner Summit Area Avalanche Observation
North East of Castle North
02/06/2016 - 09:01 Mt. Rose Wilderness Mount Rose Area Avalanche Observation
04/14/2017 - 13:00 Tram Face Squaw Avalanche Observation
D2 Wet Slab
03/13/2016 - 08:30 North of Mt. Judah Donner Summit Area Avalanche Observation
Alpenglow Expeditions
03/31/2016 - 10:00 Fireplug Mount Rose Area Avalanche Observation
11/27/2017 - 12:00 Shoulder of Elephant Back above large shelf Carson Pass Area Avalanche Observation
I was exiting above the rock in the center.
Looking down form where I exited the ridge. Notice the crack
Looking up. The highest part went the farthest, but was mostly sluff


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