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
04/10/2016 - 13:30 Woods Lake near Lost Cabin Mine Carson Pass Area Avalanche Observation
Public
01/07/2018 - 14:00 Woods Lake Carson Pass Area Snowpack Observation Minor cracking on a test slope at about 8400'.Rollerballs on steep slopes with exposed rocks., Public
12/29/2017 - 12:30 Woods Lake Carson Pass Area Snowpack Observation Cracking around skis in below treeline terrain down to weak faceted snow.Small test slope-BTL terrain, northerly aspect.  Whumpfing occurred when 1 skier got on slope.Several layers separated by thin crusts with weak faceted snow below. Forecaster
02/19/2016 - 09:26 Winter's Creek area. Mount Rose Area Avalanche Observation , , Public
01/11/2016 - 11:00 Wildflower Ridge Donner Summit Area Snowpack Observation Guide
Tahoe Mountain School
11/25/2015 - 13:45 Wildflower Ridge Donner Summit Area Snowpack Observation Forecaster
01/24/2018 - 14:28 Wildflower Ridge Donner Summit Area Snowpack Observation , , , Public
01/12/2017 - 12:30 Wildflower Ridge Donner Summit Area Snowpack Observation Fairly large sections of cornice along the ridge.Small loose dry triggered by intentional cornice collapse. Forecaster
11/14/2015 - 12:15 Wildflower Ridge Donner Summit Area Snowpack Observation Forecaster
11/20/2015 - 13:30 Wildflower Ridge Donner Summit Area Snowpack Observation Forecaster
03/04/2017 - 14:10 Wheeler Ridge Bear Valley Area Avalanche Observation
Public
12/14/2017 - 16:00 West side Relay Peak Mount Rose Area Snowpack 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
12/25/2016 - 11:07 West ridge of Castle Donner Summit Area Snowpack Observation shooting crack 1shooting crack 2 Guide
Alpenglow Expeditions
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

Pages

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