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
03/13/2018 - 11:00 Andesite Peak Donner Summit Area Avalanche Observation Large pinwheels triggered by ski kicks at the top of the slope on a ENE aspect @ 8000 ft. Loose wet sluff mixed with large pinwheels on an E aspect @ 7400 ft. Forecaster
03/18/2018 - 13:00 Incline Lake Peak Mount Rose Area Snowpack Observation Forecaster
03/20/2018 - 10:00 Echo Lake Echo Summit Area Snowpack Observation Runnels on South facing slope below Talking Mountain Roughly two foot diameter roller ball from previous days warming on South East aspect. Reverse skin track showing extent of previous snow transport. Professional Observer
03/25/2018 - 11:15 Jakes Peak (SE Face) Desolation Wilderness Area (including Emerald Bay) Avalanche Observation Public
03/23/2018 - 03:30 "Broken Glass" Tammarack Peak area Mount Rose Area Avalanche Observation Public
04/04/2018 - 12:00 Mt. Houghton Mount Rose Area Snowpack Observation 12:15pm on E aspect at 9400', 4-6'' boot pen. Forecaster
04/11/2018 - 03:30 Mr Rose trail just past waterfall Mount Rose Area Avalanche Observation Public
02/23/2018 - 11:00 Castle Peak Donner Summit Area Snowpack Observation Cornice on the right (E aspect) and wind pillow on the left (W aspect) due to the shift from SW to NE winds. Wind scoured cornices on E aspect between Castle Pass and Castle Pk. Blowing snow along the Castle Pk - Basin Pk ridgeline. No signs of new wind slab formation. Forecaster
02/26/2018 - 09:00 Donner Pass/Andesite Pk Donner Summit Area Avalanche Observation Guide
Donner Summit Avalanche Seminars
03/01/2018 - 01:30 Tamarack Peak Mount Rose Area Snowpack Observation 20'' of heavier storm snow over lighter density snow causing storm slab conditions. Large cracking around skis in BTL terrain with a density change from the heavier storm snow over lighter density old snow. New snow fell as graupel throughout the mid day. Forecaster
03/04/2018 - 14:30 Pole Creek Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation Deep Slab avalanche viewed from Helicopter Guide
Alpenglow Expeditions
03/06/2018 - 10:15 W side Castle Pk Donner Summit Area Snowpack Observation Educator
Donner Summit Avalanche Seminars
03/15/2018 - 11:30 Powderhouse Luther Pass Area (including Job and Freel) Avalanche Observation 12-16" avy crown debris field Public
03/19/2018 - 03:00 My Ralston Echo Summit Area Snowpack Observation Public
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


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