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
01/08/2018 - 12:45 Andesite Ridge/Peak Donner Summit Area Snowpack Observation Educator
Donner Summit Avalanche Seminars
03/13/2017 - 10:10 Andesite Peak Donner Summit Area Snowpack Observation Educator
Donner Summit Avalanche Seminars
11/21/2016 - 12:00 Red Lake Peak Carson Pass Area Snowpack Observation Forecaster
03/01/2018 - 11:15 Andesite Peak Donner Summit Area Avalanche Observation Small natural storm slab. Small storm slab triggered from below. Wind slab failure on a test slope caused by the natural collapse of a cornice. 1 to 2 foot deep wind slabs failing on the old/new interface on a near treeline wind loaded slope. Triggered from lower angle terrain above the slope. Wind slabs avalanche triggered from the ridge. The avalanche also caused the lower angle slope next to it to shatter but the snow did not slide downhill on the lower angle slope. Shooting crack from lower angle terrain that then becomes a wind slab avalanche in the nearby steeper terrain. Forecaster
04/22/2017 - 09:50 Incline Lake Peak Mount Rose Area Snowpack Observation Strong snow surface refreeze of the top 4 to 5 inches on SE aspect at 8,600' at 9:25 am.Thin breakable crust over recent storm snow unaffected by melt on NE aspect around 9,100'.Small lose wet avalanche on test slope along summit ridge, NE aspect at 9,500' at 9:50am. Forecaster
01/20/2017 - 10:30 Jakes Peak West Shore Area Avalanche Observation
Skier triggered wind slab avalanche.  Crown line test pit on right.
Skier triggered wind slab.  Crown up to 2' deep.  7800', NE aspect.
Test Pit at 8200', NE aspect.  ECTN's.  HST=95cm.
02/12/2017 - 13:30 Apple Bonkers and Horse Canyon Bear Valley Area Snowpack Observation Wind scouring near ridgetop in NE aspect. Forecaster
01/11/2018 - 11:45 Rubicon Peak and Peak 9,269' West Shore Area Snowpack Observation N aspect at 8,180'. Strong and supportable crusts over wet facet layer. Minimal reactivity.Snowcover looking upslope on N aspect at 8,000'.Unexpected snow shower activity at 9,080' on Peak 9,269'. Forecaster
02/05/2018 - 12:30 Red Lake Peak Carson Pass Area Snowpack Observation Previous point release loose wet avalanche activity at 9000' on E aspect.Small roller balls on test slope.  E aspect at 11:45am. Forecaster
11/28/2016 - 12:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Forecaster
11/13/2017 - 13:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Fairly thin snowcover on N aspect at 7,800'. Anchors negated.Deepening snowcover on N aspect at 8,000'. Anchors negated. Forecaster
03/22/2018 - 11:00 Andesite Peak Donner Summit Area Snowpack Observation Shooting crack on an E - NE facing wind-loaded slope at 8100 ft. Rain runnels at 7500'. Large cornice drops did not cause wind slab failure.  Heavy, wet, deep snow existed at 8200' on the top of Andesite. Forecaster
02/17/2017 - 15:00 Fireplug Mount Rose Area Snowpack Observation ECTN 20 that broke at the base of the wind slab on a NW aspect, indicating that fractures are unlikely to propagate along this layer. Very small cracking on W aspect along the ridgelines. These small wind-loaded features did crack but the wind slabs remained too small to have consequences. Forecaster
03/04/2016 - 13:00 Incline Lake Peak Mount Rose Area Snowpack Observation Forecaster
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


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