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
02/22/2017 - 13:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Cornice piece dropped onto a wind-loaded slope. It only triggered  sluffing  in the new snow and rolled down the slope.Settlement cracks around a treeWind scouring on a N-NE aspect near the Silver ridgeline Forecaster
12/04/2016 - 10:30 Relay Peak Mount Rose Area Snowpack Observation Forecaster
01/02/2016 - 10:15 Carpenter Ridge Independence Lake Area Avalanche Observation
01/17/2016 - 12:00 Donner Peak Donner Summit Area Snowpack Observation Forecaster
03/12/2018 - 12:30 Jakes Peak West Shore Area Snowpack Observation Ski cut triggering small loose wet avalanche with pin wheels up to 3 ft in diameter. Upper limit of fog/stratus layer at 6,800' at 9:50 am. Peaks in full sun. Fog/stratus layer over Lake Tahoe at 10:15 am. Forecaster
11/29/2017 - 12:00 Castle Peak Donner Summit Area Snowpack Observation Cornices above the N side of Castle PeakSurface hoar on a N aspect at 8500 ft. Small wind slab on a wind loaded test slope. The slab only measured about 5-10 cm (2-4 in) thick and did not extend downslope very far.ECTN on a wind loaded test slope at 8800 ft. on a NE aspect at the coordinates attached to the observation. Forecaster
02/09/2016 - 12:30 Incline Lake Peak Mount Rose Area Snowpack Observation Forecaster
12/13/2015 - 11:00 Deep Creek Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation
04/02/2018 - 13:00 Mt. Tallac Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Relatively smooth and supportable conditions at the upper elevations. Below 8000' on E aspects at 12:30pm, unsupportable 6-10'' of snow existed on top of talus slopes. Skier triggered D1 in treed area. Forecaster
01/04/2018 - 23:30 Chickadee Ridge Mount Rose Area Snowpack Observation Facets below slab remaining dry to moist.Skier triggered roller balls in low angle terrain, indicating possibility of loose wet avalanche potential. Forecaster
04/08/2016 - 11:30 Relay Peak Mount Rose Area Snowpack Observation Forecaster
03/24/2017 - 11:30 Incline Lake Peak Mount Rose Area Snowpack Observation Snow and wind starting in the morning hours.3-5'' wind slabs formed off of summit ridge on N aspects. Forecaster
01/05/2016 - 12:00 Andesite Ridge Donner Summit Area Avalanche Observation
01/21/2016 - 14:30 Tamarack Peak Mount Rose Area Snowpack Observation Forecaster
02/28/2018 - 10:30 Incline Lake Peak Mount Rose Area Snowpack Observation Slab of recent storm snow layered F, 4F, 1F on to top of F+ facets. Forecaster


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