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
01/12/2020 - 02:00 Talking Mtn Echo Summit Area Snowpack Observation released wind slab over trigger Public
01/12/2020 - 11:00 Incline Lake Peak Mount Rose Area Snowpack Observation Wind scoured snow in below treeline terrain Variety of firm exposed crusts throughout this area due to wind and/or sun. Forecaster
01/12/2020 - 13:00 Mt. Reba Bear Valley Area Snowpack Observation Wind loading north aspect Wind loading north aspect Cornice on north aspect Public
01/12/2020 - 13:15 Castle Ridge Donner Summit Area Snowpack Observation Clouds moved in around noon and the ceiling dropped as low as 8000 feet. Wind was moving snow around over ridges and creating wind slab. Cornice chunks broken by a ski kick, but no propagation on slope below. Professional Observer
01/12/2020 - 13:15 Johnson Canyon Donner Summit Area Avalanche Observation Public
01/12/2020 - 14:00 Blue Lakes Carson Pass Area Snowpack Observation Professional Observer
01/12/2020 - 15:30 Mt. Judah Donner Summit Area Snowpack Observation Wind blown snow coming over the ridge on a near treeline slope. Cornices building above Wildflower Ridge Forecaster
01/12/2020 - 20:15 Relay drainages Mount Rose Area Snowpack Observation Public
01/13/2020 - 12:00 Andesite Peak Donner Summit Area Snowpack Observation Active wind loading continuing over the higher ridges and peaks. Cracking on new cornice formation. Minor cracking in newly forming wind slabs today. Recent storm snow on top of the Jan 4 rain crust.  NE aspect at 7800' in open treed location. Forecaster
01/13/2020 - 12:45 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Cracking on an undercut skin track. Guide
Tahoe Mountain School
01/14/2020 - 11:30 Rubicon Peak West Shore Area Snowpack Observation Wind textured snow and blowing snow Cracking Re-loaded skin track Professional Observer
01/14/2020 - 12:00 Tamarack - Fireplug Saddle Mount Rose Area Snowpack Observation Soft Wind Slabs Public
01/14/2020 - 12:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Moderate to intense drifting snow onto N side of the E ridge of SIlver Pk. Lower end of drifting amounts experienced today. Cracking down to Jan 4 layer while breaking trail in wind protected below treeline terrain. Cracking down to Jan 4 layer while breaking trail in wind protected below treeline terrain. Forecaster
01/14/2020 - 13:00 Peaklet South East of Quail Lake West Shore Area Snowpack Observation Public
01/15/2020 - 11:00 Frog Lake Carson Pass Area Snowpack Observation In a near treeline ridge area, the 1/4 rain crust was still on the surface. Shooting cracks on a firm windslab. Thickness of wind slab (there were soft near surface facets below). Near the lowest point of our tour (around 8000 feet and well below treeline) there were pockets of wind slab. Professional Observer

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