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 Videos Observation made by
12/31/2016 - 12:00 Talking Mountain Echo Summit Area Snowpack Observation Coverage on North aspects along the ridge. Forecaster
03/27/2017 - 10:30 Lincoln Ridge Yuba Pass Area Snowpack Observation Sunny skies in the Yuba Pass area with signs of rapid warming becoming evident at 9:45 am.Kicking small cornince sections on NE aspect at treeline at 7,800' produced no results on wind loaded slope below.Signs of rapid warming/wet snow instability on SE aspect test slope at 7,800' at 10:50 am. Forecaster
01/27/2016 - 10:30 Donner Peak Donner Summit Area Snowpack Observation Forecaster
12/18/2016 - 12:00 Rubicon Peak West Shore Area Snowpack Observation Forecaster
03/07/2017 - 10:00 lncline Lake Peak Mount Rose Area Snowpack Observation Cornices and blowing snow near the summit of Incline Lake Peak.Limited wind slab cracking isolated to undercut areas. Note the skin track undercut. 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
01/19/2018 - 12:45 Castle Peak | Andesite Ridge Donner Summit Area Snowpack Observation Minor cracks that barely extend away from my skis on a traditionally wind-loaded test slope on Andesite Peak. Forecaster
01/06/2017 - 14:15 Andesite Peak Donner Summit Area Snowpack Observation Settlement crack Forecaster
02/19/2017 - 11:30 Mt. Tallac Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Wind slab up to 6in on test slope.Tiny wind slab on test slope. Forecaster
04/09/2017 - 11:30 Peak 9269' West Shore Area Snowpack Observation Signs of loose wet instability at 10am on ESE aspect at 7,000'.Skier triggered cracking of very small wind slabs near summit ridge, NE aspect.Roller ball activity below the cliffs to climbers right of the summit of Dick's Peak. Forecaster
12/21/2017 - 11:00 Andesite Peak Donner Summit Area Snowpack Observation Wind transport of snow at treeline.The maximum extent of cracking seen today in new wind slabs on W-NW aspects. Small 1.5m crack off tip of right ski.Cracking of undercut wind slab on NE aspect at treeline. Forecaster
02/21/2018 - 12:30 Chickadee Ridge Mount Rose Area Snowpack Observation Recent storm snow over poorly developed near surface facets. Forecaster
03/30/2016 - 12:00 Mt. Rose Wilderness Mount Rose Area Snowpack Observation Forecaster
12/26/2016 - 11:00 Andesite Peak Donner Summit Area Snowpack Observation Forecaster


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