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 - 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
03/06/2019 - 13:00 Andesite Peak Donner Summit Area Avalanche Observation Right flank of slide Left flank of slide Public
02/08/2019 - 13:00 Tallac Desolation Wilderness Area (including Emerald Bay) Avalanche Observation Public
03/10/2019 - 11:00 Rifle Peak Mount Rose Area Avalanche Observation Public
01/08/2019 - 10:00 Mt Rose Mount Rose Area Avalanche Observation Public
03/30/2019 - 08:30 Donner Peak Donner Summit Area Snowpack Observation I kicked a few small wind loaded test slopes and this was the extent to cracking seen. I first had to undercut this slope to get it to crack. Public
01/23/2019 - 09:15 Porcupine Ridge East Shore Area Snowpack Observation SE aspects with dry/wintery snow above 9000 ft at 9:15 am Porcupine Ridge/ST terrain The observation wall of our profile Natural roller balls on E-SE terrain under rocks Public
01/03/2019 - 10:00 Angora Peak Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Public
03/16/2019 - 11:30 Jakes Peak South Side West Shore Area Snowpack Observation Not corn, but decently soft. A steady stream of skiers helped reduce the size of any loose wet sloughs Corn snow at noon at 6,700 feet starting to get soft. Public
02/24/2019 - 02:00 Polaris Bowl & Indian Valley Carson Pass Area Snowpack Observation Public
04/04/2019 - 13:00 Johnson Canyon Donner Summit Area Snowpack Observation Cracking/punching on ascent Wet, granular snow on surface at lower elevation Rounds are ~2mm Hand pit showing saturated snow with ~2cm layer of newer snow on top Roller balls on East facing aspect across canyon Public
12/14/2018 - 11:00 Pole creek road Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Public
01/30/2019 - 13:30 Scotts Lake Luther Pass Area (including Job and Freel) Snowpack Observation Melting snow surfaces exposed to full sun. View of the S face of Waterhouse Peak Breakable crust present in some areas that receive partial shade Observation wall of the snowprofile highlighting the layer of buried surface hoar Pieces of buried surface hoar on the underside of a slab from a CT test Public
02/27/2019 - 04:00 Trestle Peak Donner Summit Area Avalanche Observation Public
02/03/2019 - 12:00 Waterhouse proper E-SE side Luther Pass Area (including Job and Freel) Snowpack Observation Public


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