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
12/16/2016 - 12:30 Andesite Peak Donner Summit Area Snowpack Observation Small localized cracking in wind loaded terrain.  E aspect 8200'Small cornice kicks did not cause any wind slab failure.  8200', E aspect.ECTN and ECTP in wind loaded E aspect.  8200'.Cracking around skis into non frozen rain crust Forecaster
03/30/2018 - 11:00 Stevens Peak Carson Pass Area Snowpack Observation 25 cm of snow surface refreeze on at 8,000' on E aspect at 10:50am Supportable crust, just entering melt phase at ~9,000' at 11:25am. Skier triggered roller ball at 8,100' on E aspect at 12:20pm. Forecaster
03/24/2016 - 12:30 Meiss Meadow Carson Pass Area Snowpack Observation Forecaster
12/04/2017 - 11:30 Rubicon Peak West Shore Area Snowpack Observation Surface Hoar was observed on the snow surface at all elevations.Skier triggered cracking on a NE facing wind-loaded test slope at 8800 ft.Skier triggered cracking on a NE facing wind-loaded test slope at 8800 ft. that was previously undercut.Snow coverage at 7400 ft.Snow coverage at 8300 ft. Forecaster
01/15/2016 - 13:00 Donner Peak Donner Summit Area Avalanche Observation
Forecaster
12/16/2015 - 14:30 Tamarack Peak Mount Rose Area Snowpack Observation Forecaster
11/21/2016 - 12:00 Castle Peak Donner Summit Area Snowpack Observation Forecaster
01/09/2018 - 11:30 Tamarack Peak Mount Rose Area Snowpack Observation Small wind slab failure resulting from a ski cut on a small wind-loaded test slope near the ridge at 9700 ft. on a NE aspect.ECTN on a N aspect at 10200 ft. on My Houghton. This test was representative of the other snowpit tests we performed today. Forecaster
03/15/2018 - 01:00 Jakes Peak West Shore Area Avalanche Observation Skier triggered wind slab near top of Peak.  E aspect, 38 degree, 8900'. Wind slab crown. Shooting cracks on small wind loaded test slope. Forecaster
04/08/2018 - 11:30 Rubicon Peak West Shore Area Snowpack Observation Snow surface refreeze of the top 10 inches of snow on flat terrain at ~7,600' at 10 am. Feet of residual wet snow below the surface refreeze. Surface wet snow 2-3 inches deep at 11:30 am on E aspect at ~8,900' Forecaster
01/06/2017 - 14:15 Andesite Peak Donner Summit Area Snowpack Observation Settlement crack Forecaster
01/27/2018 - 10:00 Chickadee Ridge Mount Rose Area Snowpack Observation Blowing snow near treeline.More blowing snow near treeline.Test slope wind slab failure 10' wide near noted lat/long.Some of the wind slab cracking giving clues to potential instability. Forecaster
11/04/2017 - 11:00 Castle Pass/Andesite Ridge Donner Summit Area Snowpack Observation 10 to 12 in of new snow on the Castle Rd at 7,400'.Base of Casltle Pass, 12 in of new snow on bare ground. New snow right side up.Andesite Ridge ~8,000', 14 inches of new snow.Andesite Ridge ~8,000', minimal wind transport. Forecaster
04/02/2016 - 11:40 Mt. Tallac Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Forecaster
12/11/2017 - 13:00 Castle Peak Donner Summit Area Snowpack Observation ECTP on a NW test slope with a hard wind slab. See pit for more details.ECTN on the same test slope. See pit for more details.Spring-like snow conditions and patchy snow coverage on SW aspects.Scoured surfaces on exposed northerly aspects. Forecaster

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