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
01/05/2019 - 10:45 Fireplug Mount Rose Area Snowpack Observation Forecaster
01/05/2019 - 16:30 Becker Ridge Echo Summit Area Snowpack Observation Professional Observer
01/06/2019 - 11:15 Hidden Peak Cirque West Shore Area Avalanche Observation Public
01/06/2019 - 12:00 Andesite Peak Donner Summit Area Avalanche Observation One of the skier triggered wind slabs near the top of Andesite Peak Small wind slab failure on a test slope. A second ski kick at the spot just after the photo was taken triggered a large whumpf. Skier triggered D1 wind slab avalanche on NE aspect at 8000'.  50' wide x 70' long. Another small D1 skier triggered avalanche in similar terrain. Cracking started at the trailhead 8 inches of new snow acculumated at the trailhead while we were out. My pole is pushed into the level of our skin track when we started the day. Forecaster
01/06/2019 - 12:00 Powderhouse Luther Pass Area (including Job and Freel) Snowpack Observation Public
01/06/2019 - 12:30 Tamarack Peak Mount Rose Area Snowpack Observation One of many easily triggered windslabs today Shooting cracks were common today Educator
Tahoe Mountain School
01/06/2019 - 13:15 Summit Ridge Poison Peak Bear Valley Area Snowpack Observation Guide
California Ski Guides
01/07/2019 - 08:00 Mt. Judah Donner Summit Area Avalanche Observation Several natural avalanches on Mt. Judah occurring at different times throughout the 1/5-1/7 storm cycle.  Some avalanches ran full path to bottom flats.  8100', E aspect. Different angle of Mt. Judah avalanches.  Some debris mostly covered and some looks to have occurred towards the end of the storm. Multiple natural wind slab avalanches on Wildflower Ridge, 7800', NE aspect. Forecaster
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
01/07/2019 - 10:00 Tamarack Peak North end E/SE face Mount Rose Area Avalanche Observation Public
01/07/2019 - 11:00 Deep creek drainage Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Ski cut above cat track produced failure on old snow rain crust/facet interface ~3’ down Public
01/07/2019 - 12:00 Hidden Peak West Shore Area Snowpack Observation One of the many whumpfs we felt between 6900 and 8300 ft. This one propogated about 100 ft away from us in all directions and left small cracks like the one I am pointing at in the snow surface. Forecaster
01/07/2019 - 13:00 Powderhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation New storm slab cracking on slope undercut by skin track. Flipping my ski pole upside down, the snow was quite resistant initially in the firm storm slab. Once through the storm slab, the snow was very soft for the rest of the length of my ski pole. Tree rings demonstrating snow settlement due to warming. Hand hardness overview of new snow. One finger hard slab, over fist hard storm snow. Professional Observer
01/07/2019 - 14:00 Andesite Ridge Donner Summit Area Snowpack Observation Educator
Donner Summit Avalanche Seminars
01/07/2019 - 15:00 Incline Lake Peak Mount Rose Area Snowpack Observation Kicking at the uphill side of the skin track yielded storm slab cracking at 8,400 feet. ECTN12 20cm down at the bottom of the dense storm slab. N aspect at 9,100 feet. CT8 at the same storm slab layer as the ECTN. This compression test also broke CT24 Q2 at the top of the crust sandwich layer in the old snow Public


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