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 Videos Observation made by
12/11/2017 - 12:00 East Ridge Tamarack Peak Mount Rose Area Snowpack Observation Forecaster
12/10/2017 - 12:30 Becker Ridge Echo Summit Area Snowpack Observation Snow coverage at 7400 ft. Snow coverage at 7800 ft. on N aspects.Looking up the ridge toward Becker Peak @ 7900 ft. Forecaster
12/10/2017 - 12:10 Castle Pass Donner Summit Area Snowpack Observation Educator
Tahoe Mountain School
12/10/2017 - 11:35 Mount Price Desolation Wilderness Area (including Emerald Bay) Avalanche Observation Public
12/09/2017 - 12:00 Relay Peak Mount Rose Area Snowpack Observation E face of Relay Peak, 10,200'.  Wind scoured by the recent NE/E winds.NW/W bowls of Relay Peak.  Wind scoured in areas and wind loaded in areas with hard slabs.2' of cohesive hard slab P to K hard.  F hard facets below.  CTM-12 SC on facet layer.ECTPV.  292 degree W/NW slope, 19 degree slope angle. Forecaster
12/09/2017 - 11:00 Elephants Back Carson Pass Area Snowpack Observation , , , Public
12/08/2017 - 14:00 Granite Chief Snowpack Observation E/SE ridge on the approach to Granite Chief.Granite Chief to Needle Ridge. Educator
Alpenglow Expeditions
12/08/2017 - 12:30 Castle Peak Donner Summit Area Snowpack Observation View of N side of Castle PeakView towards Basin PeakPrevious cornince collapse/wind slab that probably failed last Sunday during or just after storm event and partially covered. Forecaster
12/08/2017 - 10:00 Red Lake Peak Ridge Carson Pass Area Snowpack Observation Thin crust over 5 inches of loose facets which are sitting on pencil hard old snow. Professional Observer
12/07/2017 - 12:30 Incline Lake Pk Mount Rose Area Snowpack Observation Forecaster
12/06/2017 - 14:30 Andesite Peak Donner Summit Area Snowpack Observation Heavily wind scoured E aspect near summit. No snow remaining for future NE wind transport.2mECTP result along top of old nsf layer. Forecaster
12/06/2017 - 12:31 Avi Gully "Munchkins" Blackwood Canyon or Ward Canyon Area Snowpack Observation Public
12/06/2017 - 10:00 Frog Lake Ridge Carson Pass Area Avalanche Observation
Professional Observer
12/05/2017 - 13:00 Chickadee Ridge Mount Rose Area Snowpack Observation E wind scouring on N aspect, near treeline, ~9,100'.More E wind scouring on N aspect, near treeline, ~9,100'.Snow still available for wind transport on N aspect ~9,200'. Forecaster
12/05/2017 - 12:00 Castle Peak and Basin Peak Donner Summit Area Snowpack Observation Scoured surfaces on a N aspect near 8800 ft. on Basin PeakSofter unconsolidated snow on a below treeline N aspect sheltered from the NE winds @ 8200 ft. above Devils Oven Lake.  Forecaster


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