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 Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
01/15/2019 - 08:00 Jake's Peak West Shore Area Snowpack Observation A view of the pit with distinct layers. Snow fall rates picked up to S1 or S2 as we continued to ascend. Minor surface instabilities/slough (NSF and new snow) were easy to trigger in steeper terrain. Public
02/03/2019 - 13:45 Bear Valley Via Meadow Lake Rd Independence Lake Area Snowpack Observation Public
02/17/2019 - 12:00 BTL Poulsen's Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Public
03/04/2019 - 15:00 Tamarack Peak Mount Rose Area Snowpack Observation The extent to windslab cracking seen. This slab was first undercut. Small cornices broke fairly easily. Public
03/23/2019 - 11:45 Incline Lake Peak Mount Rose Area Avalanche Observation Public
02/07/2019 - 08:00 Shirley Canyon Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Surface hoar developing on north facing aspect at ~7500' Public
02/20/2019 - 08:00 Ward Canyon driveway all the way up to top of Stanford Rock area. Blackwood Canyon or Ward Canyon Area Snowpack Observation Public
03/23/2019 - 15:30 Crater Lake Carson Pass Area Avalanche Observation Reference of crown size and slide surface being old heat crusted layer. Crown area. Approximately 30m wide  Slide ran about 50 m to the next concavity   Public
01/07/2019 - 10:00 Trimmer Peak Luther Pass Area (including Job and Freel) Snowpack Observation ECTP14 at buried facet layer facets under about 40cm of new snow on E aspect at 8000' large roller balls on E aspect with warm/wet new snow Public
05/26/2019 - 12:15 Castle Peak Donner Summit Area Avalanche Observation wind slab failure on a small test slope Public
02/09/2019 - 11:30 Incline Peak Mount Rose Area Avalanche Observation Public
02/23/2019 - 11:00 Stevens Peak Carson Pass Area Snowpack Observation Public
03/10/2019 - 11:00 Rifle Peak Mount Rose Area Avalanche Observation Public
01/08/2019 - 15:00 Andesite Peak Donner Summit Area Avalanche Observation Public
01/24/2019 - 13:00 Waterhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation Cold snow with tree drippings on N aspects below treeline. Most prominent below 8,000'. Exposed rain cust visible above treeline in the distance on Steven's Pk, Red Lake Pk, and beyond. Cornices eroded by NE winds along the summit ridge. 1 cm melt freeze crust on S aspect at 9,490' Public


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