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 button above.
Date and time of observation or avalanche occurrence Location Region Observation Type Photos Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
12/20/2019 - 11:30 National Geographic Bowl Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Guide
Alpenglow Expeditions
12/21/2019 - 02:00 judah billboards Donner Summit Area Snowpack Observation Educator
Alpine Skills International (ASI)
12/21/2019 - 10:00 Mt. Tallac Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Public
12/21/2019 - 10:30 Upper Ophir Creek Mount Rose Area Snowpack Observation 6 inches of unconsolidated, slightly faceted surface snow. 6 inches of unconsolidated, slightly faceted surface snow. Signs of around 8 inches of snowpack settlement in the past week. Forecaster
12/21/2019 - 10:30 Rubicon Peak West Shore Area Snowpack Observation Public
12/21/2019 - 11:30 Andesite Peak Donner Summit Area Snowpack Observation Wind Loaded Pillow Shooting Crack Annotated Pit Professional Observer
12/21/2019 - 11:45 Munchkins / East of Alpine meadows Five Lakes Area Snowpack Observation Right-side up snowpack @7800ft NE aspect Guide
Tahoe Mountain School
12/21/2019 - 12:00 Noble Canyon, Upper and Lower Kinney Lake, Kinney Reservoir Ebbetts Pass Area Snowpack Observation Professional Observer
12/21/2019 - 13:30 Castle Peak pass Donner Summit Area Avalanche Observation Public
12/22/2019 - 02:00 donner judah saddle Donner Summit Area Snowpack Observation Public
12/22/2019 - 10:00 Tahoe Meadows Mount Rose Area Snowpack Observation Notably icy crust compared to rest of slope on Tamarack. This particularly icy crust was close to an open stream. Fracuture layer at about 5 cm after shovel was used to push on the snow column Some weird wind features near edge of Tahoe meadows, close to where snowpit was made. Public
12/22/2019 - 11:15 NE Aspect Incline Peak Mount Rose Area Snowpack Observation Public
12/22/2019 - 12:00 Rubicon Peak West Shore Area Snowpack Observation Forecaster
12/22/2019 - 13:15 Andesite peak Donner Summit Area Snowpack Observation Small windslab on test slope Shooting cracks on test slope prior to the small slab releasing Educator
Tahoe Mountain School
12/23/2019 - 12:00 Castle Peak/Andesite Peak Donner Summit Area Snowpack Observation Small loose dry sluffing in steeper terrain near treeline. Isolated cracking in protected near treeline terrain down to previous surface crust. Plenty of snow available for future wind transport along ridges. Forecaster


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