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 button above.
Date and time of observation or avalanche occurrence Location Region Observation Type Photos Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
03/07/2020 - 20:00 Blue Lakes Carson Pass Area Snowpack Observation Public
03/07/2020 - 15:30 LTCC Avy 2 elephant hump pit Carson Pass Area Snowpack Observation Public
03/07/2020 - 14:30 Red Lake State Park Carson Pass Area Snowpack Observation Public
03/07/2020 - 11:30 Andesite Peak Donner Summit Area Snowpack Observation Trace of new snow at the trailhead at 10 am. Thin layer of new snow on very supportable refrozen old snow surface. No new drifting prior to 11 am in traditionally wind loaded areas near the ridgetop. Forecaster
03/06/2020 - 15:30 Blue Lakes near border ruffian Carson Pass Area Snowpack Observation Public
03/06/2020 - 15:00 Powderhouse Luther Pass Area (including Job and Freel) Snowpack Observation Educator
Lake Tahoe Community College - Wilderness Education
03/06/2020 - 12:00 Rubicon Peak West Shore Area Snowpack Observation Transitional soft snow on east aspects below peak. Corn snow lower on peak around 8000'. Forecaster
03/06/2020 - 11:00 Tamarack Peak Mount Rose Area Snowpack Observation low tide at trailhead N facing 9500’ HS 150 ECTN 18 130cm ECTN 28 120 cm on softer more angular layers sun affected, wind scoured, wind loaded wind scoured hourglass sun affected proletariat with wave clouds Public
03/06/2020 - 11:00 Red Lake Peak Carson Pass Area Snowpack Observation A quick pit with hand hardness on a north aspect at 8800 feet. Ridges were windy and skies were mostly blue over Red Lake Peak. To the east huge lenticular clouds loomed. Sunny slopes from 8-9500 feet had minimal ski penetration. Stepping off my split board on the sunny side of the ridge there were areas with a weaker surface and 35 cm boot penetration. Steeper sunny east facing terrain was decent corn around 11am. Professional Observer
03/05/2020 - 10:45 Mt. Judah Donner Summit Area Snowpack Observation Melt freeze crust with some areas of transitional soft snow on east aspects. Transitional previous storm snow on east aspects in wind protected areas. Melting out rocks with running water on the south side of Judah. Forecaster
03/04/2020 - 12:30 Incline Peak/Slab Cliffs Mount Rose Area Snowpack Observation N aspect pit with no signs of instability at old/new interface. Ski cut on S aspect test slope around 9,500' at 12:30pm producing minor loose wet. Ski cut on another upper elevation S aspect around 12:30pm producing loose wet.. Forecaster
03/03/2020 - 14:30 Castle Peak Donner Summit Area Snowpack Observation Castle Pass and Castle Peak South face of Castle Peak with areas of newer wind-deposited snow. Ski pole penetration on NW-facing slope. Public
03/03/2020 - 12:30 Rubicon peak West Shore Area Snowpack Observation Warm and wet midday turns on east aspects. View towards Desolation Wilderness. Forecaster
03/03/2020 - 08:15 Mount Tallac Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Public
03/03/2020 - 08:00 Mt. Rose Mount Rose Area Snowpack Observation Open area at lower elevations that looked like may have experienced rain on snow or rapid surface melt Thick, wind affected slab that broke around my bomb hole, although no significant propagation (at least on this slope) Public


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