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
12/18/2016 - 12:00 Rubicon Peak West Shore Area Snowpack Observation Forecaster
02/26/2016 - 12:45 Rubicon Peak West Shore Area Snowpack Observation Forecaster
11/27/2016 - 07:00 Castle Peak and Basin Peak Donner Summit Area Avalanche Observation Forecaster
01/06/2017 - 14:15 Andesite Peak Donner Summit Area Snowpack Observation Settlement crack Forecaster
03/26/2017 - 11:00 Elephant's Hump Carson Pass Area Snowpack Observation Difficult to see in photo, but minor amounts of blowing snow visible in near and above treeline areas.Sun/melt-freeze crust that existed in the vast majority of areas, including on some steeper and/or shaded N aspects.Signs of settlement of recent storm snow. Forecaster
02/02/2018 - 10:15 Lincoln Valley Yuba Pass Area Snowpack Observation Recent roller balls created by snow falling from sun exposed trees onto colder shaded N aspect terrain did not produce any degree of loose wet avalanche activity. Forecaster
03/30/2016 - 12:00 Mt. Rose Wilderness Mount Rose Area Snowpack Observation Forecaster
11/23/2015 - 11:30 Carpenter Ridge Independence Lake Area Snowpack Observation Forecaster
12/26/2016 - 11:00 Andesite Peak Donner Summit Area Snowpack Observation Forecaster
11/15/2017 - 08:30 Rubicon Peak West Shore Area Snowpack Observation Large exposed anchors (aka rocks, stumps, logs, etc) on a north aspect at 8600 ft55 cm deep snowpack consisting of moist new snow and moist larger grained old snow near the bottom.Snow coverage at 7500 ft.Snow coverage at 7200 ft. Forecaster
01/19/2018 - 11:00 Incline Lake Peak Mount Rose Area Snowpack Observation Intentionally cracked wind slab along summit ridge near noted lat/long.Another intentionally cracked wind slab along summit ridge near noted lat/long. Forecaster
12/09/2016 - 12:00 Grouse Rocks Blackwood Canyon or Ward Canyon Area Snowpack Observation Forecaster
02/07/2016 - 09:00 Andesite Ridge Donner Summit Area Snowpack Observation Forecaster
12/20/2017 - 12:00 Castle Peak Donner Summit Area Snowpack Observation Shooting cracks triggered by ski kicks on an E facing wind-loaded test slope at 7900 ft.The same slope after it failed on the next ski kick. Forecaster
04/13/2016 - 13:00 Red Lake Peak Carson Pass Area Snowpack Observation Forecaster

Pages

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