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
01/22/2020 - 11:00 Mt. Judah Donner Summit Area Snowpack Observation Large cornice chunks did not initiate propagation or cracking on slopes below. Wind slab cracking in areas that were undercut.  Wind slabs up to 6'' deep. Wind scoured ridges offer no additional snow for wind transport. Mid and high level clouds this morning with increasing periods of sun. Forecaster
01/23/2020 - 07:15 Tamarack Mount Rose Area Snowpack Observation Public
01/23/2020 - 10:30 Stoney Ridge West Shore Area Snowpack Observation Forecaster
01/23/2020 - 11:30 Talking Mountain Echo Summit Area Snowpack Observation Saturated wet snow Surface Hoar growing in flat and north aspects above 8500 feet Lingering clouds (and perhaps some smoke) over Tahoe indicating inversion Snow settlement crack Professional Observer
01/23/2020 - 13:00 Waterhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation Small (1-2mm) surface hoar observed near 7800', NE aspect, 10:00am Large (7-9mm) surface hoar observed near 9380', NE aspect, 2:00pm Educator
Lake Tahoe Community College - Wilderness Education
01/24/2020 - 08:00 Elephant’s Back Carson Pass Area Avalanche Observation Public
01/24/2020 - 10:30 Rubicon Peak West Shore Area Snowpack Observation surface crust graupel surface cracking Professional Observer
01/24/2020 - 12:00 Red Lake Peak Carson Pass Area Snowpack Observation , Professional Observer
01/24/2020 - 13:15 Scout Peak Echo Summit Area Snowpack Observation Wet conditions in the shaded trees on Echo Summit (these drops were liquid, not frozen). Hand hardness. 170 cm total snow height. 2cm rain crust on surface that was frozen in open areas. Professional Observer
01/24/2020 - 14:00 Far East Ridge of Tamarack Peak Mount Rose Area Snowpack Observation Scoured surfaces and raised tracks on an exposed slope. Wind effects on a moderately sheltered slope. Minor cracking on a wind-loaded test slope after it was undercut. Skier triggered collapse of an unsupported drift next to a creek that failed on the Jan 4 weakness. Forecaster
01/25/2020 - 08:00 Tahoe Meadows Ridges Mount Rose Area Snowpack Observation Public
01/25/2020 - 09:00 Radio Towers Mount Rose Area Snowpack Observation ECTP 16 Public
01/25/2020 - 10:00 SW shoulder of Red Lake Peak Carson Pass Area Avalanche Observation Public
01/25/2020 - 10:00 Stevens Peak Carson Pass Area Snowpack Observation Public
01/25/2020 - 11:00 Lincoln Valley Yuba Pass Area Snowpack Observation A rain crust existed on the surface on all aspects and elevations in this area. Ski penetration through melted rain crust. Forecaster

Pages

Subscribe to Central Sierra Nevada / Lake Tahoe Snowpack, Weather, and Avalanche Observations for California and Nevada from SAC