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 http://www.snowpilot.org/. 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 Videos Observation made by
02/25/2017 - 10:10 Fireplug Mount Rose Area Avalanche Observation
Public
01/25/2017 - 13:00 Castle Peak Donner Summit Area Snowpack Observation Public
04/15/2017 - 13:00 Mt. Tallac Cross Desolation Wilderness Area (including Emerald Bay) Avalanche Observation Public
01/06/2018 - 06:00 Twin Peaks Blackwood Canyon or Ward Canyon Area Avalanche Observation Public
02/11/2017 - 15:15 West of Relay Ridge Mount Rose Area Snowpack Observation Shooting crack 15 feet longDebris from wind loaded test slope that failed40 cm crown from wind loaded test slope Public
01/27/2016 - 09:30 Castle Peak North Donner Summit Area Snowpack Observation Public
12/06/2017 - 12:31 Avi Gully "Munchkins" Blackwood Canyon or Ward Canyon Area Snowpack Observation Public
12/20/2015 - 12:30 Andesite ridge Donner Summit Area Snowpack Observation Public
02/18/2017 - 14:21 Andesite Peak Donner Summit Area Snowpack Observation Public
01/15/2017 - 13:45 Jobs Peak (Jaws) Luther Pass Area (including Job and Freel) Avalanche Observation
Public
01/24/2018 - 08:50 Red Lake peak Carson Pass Area Snowpack Observation Public
12/30/2015 - 12:30 Mt. Reba/Round Valley Bear Valley Area Snowpack Observation , , Public
01/23/2016 - 15:00 Castle Valley Donner Summit Area Snowpack Observation , Public
03/19/2017 - 11:01 Mt. Tallac (summer) trail Desolation Wilderness Area (including Emerald Bay) Avalanche Observation
Public
11/30/2017 - 13:45 Judah Ridge just below reflector towers near treeline Donner Summit Area Snowpack Observation Public

Pages

Subscribe to Central Sierra Nevada / Lake Tahoe Snowpack, Weather, and Avalanche Observations for California and Nevada from SAC