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 Videos Observation made by
01/27/2018 - 12:11 Waterhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation Public
01/27/2018 - 12:00 Blue Lakes Carson Pass Area Snowpack Observation Professional Observer
01/27/2018 - 12:00 Carpenter Ridge Independence Lake Area Snowpack Observation Cornice drop that produced no signs of instabilityCornice that failed during the last storm cycle Public
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
01/27/2018 - 09:05 North Castle Peak Donner Summit Area Avalanche Observation
North East of Castle North
01/27/2018 - 08:00 Midway between Lincoln and Anderson Peak Donner Summit Area Avalanche Observation
Small, wide slab avalanche just below the Crest
Same slide from skier's left edge
01/26/2018 - 16:00 Bronco Chutes Mount Rose Area Snowpack Observation Cornice cut producing no instability on relatively sheltered N aspectWind Slab Crown measuring 30-40cm Ski cut on NW wind loaded complex terrain that resulted in a D2 Avalanche. Public
01/26/2018 - 12:30 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Loose dry sluff triggered by a ski cut on a steep below treeline test slope. N aspect 7700 ft.Small cracking on a wind-loaded test slope along the ridge. NE aspect 8100 ft. Forecaster
01/26/2018 - 12:00 Castle Pass and Andesite Ridge Donner Summit Area Snowpack Observation Ski cut on wind loaded test slope above treeline producing no signs of instability.Intentionally collapsing cornice pieces onto wind loaded slopes near the summit of Andesite Pk produced no slab failure, just entraining of loose dry snow., Forecaster
01/25/2018 - 12:00 Andesite Ridge Donner Summit Area Snowpack Observation Minor storm slab cracking on slightly upside down storm snow 6 in below surface.Pit dug at top of below treeline avalanche path producing all ECTN results.Maximum extent of cracking seen in near or above treeline wind slab features.Ski cutting on wind slab test slopes produced either very minor or no results. Forecaster
01/25/2018 - 11:30 East Ridge Tamarack Peak Mount Rose Area Snowpack Observation Stubburn wind slabs with cracking and shooting cracks in wind loaded terrain. Many large cornice drops on slopes caused shooting cracks but no slab release.  East Ridge of Tamarack.Wind textured surface snow on Far East Ridge.ECTP-29 failing into the old snow.  A layer of F hard snow existed below old surface crust.  9300', N aspect.Avalanche debris from early in the storm almost entirely covered up.  Cornice failure and/or wind slab avalanche release.  9300', N aspect. Forecaster
01/24/2018 - 23:30 Lake of the Woods. Independence Lake Area Avalanche Observation
Digging into the crown to look at the faceted failure layer.
Subtle line of mostly filled in crown visible ~ 10 ft down slope of person in photo.
Looking down the avalanche path.
01/24/2018 - 14:28 Wildflower Ridge Donner Summit Area Snowpack Observation , , , Public
01/24/2018 - 12:00 Rubicon Peak West Shore Area Snowpack Observation Blowing snow below treeline.Blowing snow near summit of Rubicon Peak. Fresh wind slabs below summit pinnacle on E aspect.Signs of small wind slabs forming with redistribution of old snow on the ground.Obvious plumes of blowing snow on Dick's Peak as seen from the saddle on the S side of Rubicon's summit. Forecaster
01/24/2018 - 11:00 Lower Andesite Ridge Donner Summit Area Avalanche Observation
Tahoe Mountain School