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
03/23/2019 - 12:15 Plavada Outside of the Forecast Area Avalanche Observation Skier triggered loose wet on a steeper rollover. Loose wet failure on a test slope Public
03/23/2019 - 14:00 Wrights Lake Outside of the Forecast Area Snowpack Observation Public
03/23/2019 - 14:30 Mt. Reba Bear Valley Area Avalanche 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
03/23/2019 - 23:45 Red Lake Peak Carson Pass Area Avalanche Observation Public
03/24/2019 - 08:00 Castle Pass Donner Summit Area Snowpack Observation Surface Hoar near Castle Pass Looking down to the south from the shoulder of Castle Peak. Educator
Lake Tahoe Community College - Wilderness Education
03/24/2019 - 10:00 Tamarack Peak/Fireplug Mount Rose Area Snowpack Observation loose wet slides on fireplug Public
03/24/2019 - 10:30 Ridge line between Castle peak and Basin peak Donner Summit Area Avalanche Observation Public
03/24/2019 - 10:30 Judah Peak Donner Summit Area Avalanche Observation We saw 5 more small slides like this above the snow sheds that seemed to be from yesterday. Wind effect along the Judah Ridge Two slides could be seen looking back at Judah Peak from Donner Peak in at noon. Public
03/24/2019 - 10:45 Avalanche Path on S side of Mt Ralston Echo Summit Area Avalanche Observation Arrow shows area where slide started Shows trigger point partial path Debris where it stopped on a bench across from our rest spot Public
03/24/2019 - 10:45 Fireplug Mount Rose Area Avalanche Observation Public
03/24/2019 - 11:00 Slide Mountain Mount Rose Area Snowpack Observation Small skier triggered wind slab with loose wet characteristics.  8600', south aspect, at 11:45am. Small loose wet avalanches on Fireplug.  E/SE aspect, 9200', 11am. Small wind slab cracking on test slope, 3-4'' deep, NE aspect, 9650'. Forecaster
03/24/2019 - 12:00 Luther Pass Luther Pass Area (including Job and Freel) Snowpack Observation Professional Observer
03/24/2019 - 12:30 rose knob Mount Rose Area Avalanche Observation Public
03/24/2019 - 12:45 Johnson Canyon Donner Summit Area Snowpack Observation D1 skier triggered loose wet avalanche on east aspect @ 7300ft glide crack near johnson creek widespread surface hoar early AM before solar / warming Educator
Tahoe Mountain School


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