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
02/25/2019 - 13:15 Stanford Rock Blackwood Canyon or Ward Canyon Area Avalanche Observation Public
02/25/2019 - 11:30 Peak 9269 West Shore Area Avalanche Observation Public
02/25/2019 - 11:00 Peak 9269' West Shore Area Snowpack Observation Intense blowing snow in below treeline areas at 8000'. 1cm layer of 2-3mm graupel on top of the 2/14 rain crust. Right side up snowpack with the thick 2/14 rain crust down 78cm. Forecaster
02/25/2019 - 10:15 Deep Creek Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Small cornice collapse Shooting crack Guide
Alpenglow Expeditions
02/25/2019 - 09:30 Fire Plug Mount Rose Area Snowpack Observation Kicking at the uphill side of the skin track yielded some small windslab failures Windslab from first photo. Isolated pockets of sun softened crust on SSE aspects at 10:30. Public
02/24/2019 - 15:30 Brockway Summit Sawtooth Ridge to Tahoe City Snowpack Observation Artificially loaded pst, snow surface green 25/100cm. new old snow interface red 28/100cm ECTN8 4 inches down on the new old snow interface Public
02/24/2019 - 15:00 Verdi peak Outside of the Forecast Area Avalanche Observation Public
02/24/2019 - 14:15 Johnson Canyon Donner Summit Area Avalanche Observation Small intentionally triggered wind slab on test slope Public
02/24/2019 - 12:45 Castle Pass / Andesite peak Donner Summit Area Snowpack Observation kick test on SE aspect off castle pass Educator
Tahoe Mountain School
02/24/2019 - 12:00 Jake's Peak West Shore Area Snowpack Observation Public
02/24/2019 - 12:00 Castle Peak, NW Donner Summit Area Avalanche Observation Public
02/24/2019 - 11:45 Waterhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation Shooting crack approx 0.75m in length. Triggered in near treeline terrain after several hard jumps in other spots. Wind scouring on S to SE aspects. Public
02/24/2019 - 11:15 Castle Peak Donner Summit Area Avalanche Observation Public
02/24/2019 - 11:00 Mt. Judah Donner Summit Area Avalanche Observation East bowl of Mt. Judah with active wind loading.  Small natural wind slab avalanche in upper middle of photo. Cornice along with wind slab failure from ski kick on small test slope at 7400'.  Wind slab up to 8-12'' deep. Firm rain crust exposed in some areas from wind scouring on ridges. Wind scoured ridge with still some snow available for transport.  Ski pen 0, pole pen 6''. Forecaster
02/24/2019 - 10:30 Rubicon Peak West Shore Area Snowpack Observation sun affected snow down low surface hoar and wind effect wind features with strong gusts blowing at this time wind layer breaking into "cookies" Public


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