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 http://www.snowpilot.org/. 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
01/08/2020 - 10:30 Mt Judah Donner Summit Area Avalanche Observation Wind Loaded Pillow Intentionally triggered wind slab avalanche Intentionally triggered wind slab avalanche Intentionally triggered wind slab avalanche Professional Observer
01/08/2020 - 12:00 Mt. Judah Donner Summit Area Avalanche Observation Guide
Alpenglow Expeditions
01/08/2020 - 12:00 Becker Peak Echo Summit Area Snowpack Observation Professional Observer
01/08/2020 - 12:45 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation
One of 5 intentionally triggered D1 wind slabs in near treeline terrain.
Another of 5 intentionally triggered D1 wind slabs in near treeline terrain.
Forecaster
01/08/2020 - 13:00 Mount Judah Donner Summit Area Snowpack Observation Professional Observer
01/09/2020 - 11:30 Castle Peak/Andesite Peak Donner Summit Area Avalanche Observation New wind slabs failing on Jan 4 crust. Small D1 wind slab on E aspect Shooting cracks in wind loaded terrain Small loose dry sluffing. Low level clouds with periods of very light snow. Forecaster
01/10/2020 - 07:00 Tamarack Peak Mount Rose Area Snowpack Observation Shooting cracks in obvious wind slab at top of Proletariat Blowing snow and new wind drifts near summit of Tamarack Small cornice formation on SSW aspect of Tamarack summit approach Cracking in small wind slab on SSW aspect of Tamarack summit approach Public
01/10/2020 - 11:00 Granite Lake Desolation Wilderness Area (including Emerald Bay) Snowpack Observation About 1cm of new snow with 3 mm graupel mixed in. Professional Observer
01/10/2020 - 12:45 Stoney Ridge/Meeks Ridge West Shore Area Snowpack Observation Forecaster
01/11/2020 - 11:00 Castle Peak Avalanche Observation The right flank of the shooting crack. Cracks extended all the way to the closest trees. ECTP22 on the flank of the shooting crack. Right flank of shooting crack where pit was dug. avalanche crown on similar aspect to shooting cracks. ECTP12 on a S aspect. Note 3 slab layers. The middle one was the primary failure and bottom was the rain crust. Public
01/11/2020 - 11:45 Tamarack Pk/Galena Cr Mount Rose Area Snowpack Observation PST with artificial 10 cm load ready to test. Clean propagation. Signs of mixed scouring and drifting. Open areas previously scoured by NE winds. Forecaster
01/11/2020 - 12:00 Becker/Talking Cirque Echo Summit Area Snowpack Observation Professional Observer
01/11/2020 - 12:00 Andesite Peak Donner Summit Area Snowpack Observation Skier triggered shooting crack on an ENE facing wind loaded test slope. 10 to 12 in. deep wind slab on a wind loaded test slope. Signs of wind transport in exposed near and above treeline terrain. Forecaster
01/11/2020 - 12:30 Wild flower Ridge Donner Summit Area Snowpack Observation Public
01/11/2020 - 17:00 Wildflower Ridge / Mt. Judah Donner Summit Area Avalanche Observation D2 wind slab avalanche on the E face of Judah Wind slab avalanche on Wildflower Ridge Forecaster

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