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 Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
01/17/2016 - 23:30 Crater Lake Road Carson Pass Area Avalanche Observation
Professional Observer
03/01/2017 - 14:00 above buck lake West Shore Area Avalanche Observation wind loaded slab wind loaded slabs Public
01/29/2016 - 22:43 Negro Canyon Donner Summit Area Avalanche Observation
Public
03/14/2017 - 13:00 West Ridge of Mt. Tallac Desolation Wilderness Area (including Emerald Bay) Avalanche Observation
Loose wet avalanche size D1.5-D2 triggered by natural cornice collapse.
Forecaster
03/15/2016 - 13:00 Donner Peak Donner Summit Area Avalanche Observation
Guide
Tahoe Mountain School
11/11/2015 - 11:00 NE slope of Elephant's Back Carson Pass Area Avalanche Observation
Public
01/03/2017 - 13:25 rose knob Mount Rose Area Avalanche Observation Public
01/22/2017 - 08:45 Third Creek Drainage Mount Rose Area Avalanche Observation
Small natural windslab avalanche on north facing wind loaded micro feature.
Shooting cracks and breakable windslab on skin track
Approximate layers that reacted during CT and the Jan 8 rain crust is visible at the bottom
Public
12/26/2015 - 10:00 Ralston Peak Desolation Wilderness Area (including Emerald Bay) Avalanche Observation Public
01/04/2016 - 21:45 Ward Peak, west face Blackwood Canyon or Ward Canyon Area Avalanche Observation Guide
Alpenglow Expeditions
02/12/2017 - 11:30 Main bowl of Rose Knob Peak East Shore Area Avalanche Observation Public
02/18/2017 - 03:30 Frog Lake Ridge above Red lake Carson Pass Area Avalanche Observation
Crown and bed surface
Skier with debris field.
Public
01/15/2016 - 13:00 Donner Peak Donner Summit Area Avalanche Observation
Forecaster
02/22/2017 - 03:10 Little Gold Lake Outside of the Forecast Area Avalanche Observation Lakes Basin
Public
01/18/2016 - 07:00 Castle Peak (SnoMo Bowl) Donner Summit Area Avalanche Observation
Public

Pages

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