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
03/22/2016 - 11:00 Mt Judah Donner Summit Area Snowpack Observation Public
02/16/2017 - 13:17 1/2 way up Powderhouse Luther Pass Area (including Job and Freel) Snowpack Observation Wandering crust below 70cm Rain CrustSlope angleRain Crust @70cm from topPit aspect and coordinatesSlope where snowpit was dug (past dead tree in pic) , Public
01/13/2016 - 23:31 North aspect near Tinker Knob Donner Summit Area Avalanche Observation Public
04/09/2017 - 12:00 Polaris Bowl Avalanche Observation
01/10/2017 - 23:01 Powderhouse Luther Pass Area (including Job and Freel) Avalanche Observation Public
02/03/2016 - 23:19 Symphony Bowl-South Slide Mtn Mount Rose Area Avalanche Observation
03/10/2018 - 11:15 lower Hawk's Peak, Tahoe Donner Nordic area Donner Summit Area Snowpack Observation Public
11/24/2017 - 13:05 Round Top Carson Pass Area Snowpack Observation Previous post hole. I was able to stand on top on not sink. 190lbs Public
03/23/2018 - 03:30 Mt. Houghton Mount Rose Area Avalanche Observation Public
02/04/2017 - 14:00 North aspect, south of Peter Grub Hut Donner Summit Area Snowpack Observation Public
01/03/2016 - 10:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Public
04/14/2017 - 09:45 East of frog lake Carson Pass Area Avalanche Observation
01/14/2017 - 13:00 Castle Peak Andesite Ridge Donner Summit Area Snowpack Observation Public
12/15/2015 - 10:30 Incline Lake Peak Mount Rose Area Avalanche Observation
01/27/2018 - 08:00 Midway between Lincoln and Anderson Peak Donner Summit Area Avalanche Observation
Small, wide slab avalanche just below the Crest
Same slide from skier's left edge


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