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
03/22/2018 - 13:00 Proleteriat Mount Rose Area Avalanche Observation Avalanche on the Proletariat that failed on the buried graupel layer. Avalanche on the NE slope just W of Proletariat that may have been more of a wind slab and may not have involved the graupel layer. Forecaster
01/26/2017 - 12:00 Mt. Rose Mount Rose Area Snowpack Observation Small crack on a previously undercut wind loaded SE facing test slope @ 9900 ft.Wind scouring along the W side of the ridgeline @ 10000 ft.Oven to refrigerator sized cornice peices dropped onto a wind loaded NE facing slope at 10000 ft. did not trigger any signs of current instability. Forecaster
12/17/2017 - 12:30 Lincoln Ridge Yuba Pass Area Snowpack Observation Variable wind scoured snow surfaces in open N-NE facing areas at 7600 ft.Firm rain crust exposed by wind scouring on a NE aspect near the ridgeline.Snow coverage at 7200 ft. Near surface facets on northerly aspects. Forecaster
12/17/2015 - 01:00 Jake's Peak West Shore Area Snowpack Observation Forecaster
11/25/2016 - 12:15 North Side of Castle Peak Donner Summit Area Snowpack Observation Forecaster
03/11/2017 - 11:30 Rose Knob Mount Rose Area Snowpack Observation Small skier triggered loose wet activity.Below 8500' on E/SE aspects, roller ball activity.At 8000' and below, fully unsupportable snow conditions. Forecaster
02/17/2018 - 09:30 Chickadee Ridge Mount Rose Area Snowpack Observation Tiny, superficial wind slab near treeline, too small to present a significant hazard.More tiny, superficial wind slab near treeline, too small to present a significant hazard. Forecaster
02/01/2016 - 13:00 Carpenter Peak Independence Lake Area Snowpack Observation Forecaster
02/29/2016 - 12:00 Mt. Houghton & Tamarack Pk Mount Rose Area Snowpack Observation Forecaster
03/24/2016 - 15:00 Emerald Bay Chutes Desolation Wilderness Area (including Emerald Bay) Avalanche Observation
12/22/2015 - 11:00 Andesite Ridge Donner Summit Area Snowpack Observation Forecaster
01/15/2016 - 13:00 Donner Peak Donner Summit Area Avalanche Observation
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
12/25/2015 - 12:45 Drifter Bowl Donner Summit Area Snowpack Observation Forecaster
12/04/2016 - 10:30 Relay Peak Mount Rose Area Snowpack Observation Forecaster


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