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
01/19/2018 - 12:45 Castle Peak | Andesite Ridge Donner Summit Area Snowpack Observation Minor cracks that barely extend away from my skis on a traditionally wind-loaded test slope on Andesite Peak. Forecaster
03/09/2017 - 11:00 Incline Lake and Rose Knob Peak Mount Rose Area Snowpack Observation Debris from large ski-cut-triggered pinwheels and roller balls.More pinwheels on a smaller slope at about 3 ft. in diameterDivots and runnels created by the recent warming. Forecaster
02/13/2018 - 12:00 Grouse Rock Blackwood Canyon or Ward Canyon Area Snowpack Observation Wind scoured E aspect at 8300' on Grouse Rock.Very small superficial wind slab in near treeline terrainWind effected surface snow.Wind scoured N aspect at 8200'. Forecaster
01/30/2017 - 12:00 Rubicon Peak West Shore Area Snowpack Observation Signs of 2+ feet of storm snow settlement. Forecaster
12/21/2017 - 11:00 Andesite Peak Donner Summit Area Snowpack Observation Wind transport of snow at treeline.The maximum extent of cracking seen today in new wind slabs on W-NW aspects. Small 1.5m crack off tip of right ski.Cracking of undercut wind slab on NE aspect at treeline. Forecaster
12/04/2015 - 11:45 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Forecaster
03/16/2017 - 12:00 Twin Crags Sawtooth Ridge to Tahoe City Snowpack Observation Loose wet sluff triggered by a ski cut on a S aspect at 6900 ft. @ noon.More ski cut triggered loose wet sluffs on a S aspect test slope.Mid shin deep wet snow on a S aspect at 6600 ft. at 10:30 am. Forecaster
12/30/2015 - 11:00 Andesite Ridge Donner Summit Area Snowpack Observation Forecaster
01/12/2017 - 12:00 Deep Creek Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Loose dry sluff triggered by a small cornice dropped onto the slope.The wind loaded test slope that cracked and failed with a hard ski kick after previously being undercut.Settlement crack around the base of a tree. Forecaster
03/06/2016 - 11:30 Hidden Peak West Shore Area Snowpack Observation Forecaster
03/27/2018 - 15:00 Emerald Bay Chutes - Jake's Peak West Shore Area Avalanche Observation Looking up from the toe of the debris of the loose wet avalanche Looking up from the toe of the debris of the loose wet avalanche Forecaster
12/29/2017 - 12:30 Woods Lake Carson Pass Area Snowpack Observation Cracking around skis in below treeline terrain down to weak faceted snow.Small test slope-BTL terrain, northerly aspect.  Whumpfing occurred when 1 skier got on slope.Several layers separated by thin crusts with weak faceted snow below. Forecaster
03/31/2016 - 10:00 Fireplug Mount Rose Area Avalanche Observation
01/08/2016 - 11:00 Andesite Ridge Donner Summit Area Snowpack Observation Forecaster
02/26/2018 - 12:00 East Ridge Tamarack Peak Mount Rose Area Avalanche Observation Skier triggered small wind slab from cornice kick.  Easy to trigger but limited propagation. Shooting cracks and slab release in wind loaded terrain off of ridgeline. Small natural wind slab avalanche, N aspect, 9300', 40 degree slope. Forecaster


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