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
01/07/2018 - 14:25 Proletariat Bowl Skier's Right Mount Rose Area Avalanche Observation Public
01/07/2018 - 14:09 Castle Pass Donner Summit Area Snowpack Observation Facets below crustFirm crust on all aspects Guide
Tahoe Mountain School
01/07/2018 - 14:00 Woods Lake Carson Pass Area Snowpack Observation Minor cracking on a test slope at about 8400'.Rollerballs on steep slopes with exposed rocks., Public
01/07/2018 - 12:30 Red Lake Peak Carson Pass Area Snowpack Observation Skier triggered cracking on a northerly aspect at ~8600 ft. where a 10 ft. x 10 ft. whumpf occurred. The weak layer was moist facets below a rain crust at the base of the new snow.ECPT on a N aspect @ 8880 ft. The weak layer was moist to dry facets below a rain crust at the base of the new snow. Forecaster
01/06/2018 - 13:00 East Ridge Relay Peak Mount Rose Area Snowpack Observation Large shooting cracks where storm snow sits on top of old near surface facets.  9400' N aspect.Same area as Photo #1.  9400' N aspect.ECTP11 on old near surface facets below the new storm snow.  9600' on N aspect in below treeline wind protected terrain. Forecaster
01/06/2018 - 12:30 Andesite Ridge Donner Summit Area Snowpack Observation Breakable Crust on Andesite RidgeCastle Peak with lift clouds around 12 30 Educator
Tahoe Mountain School
01/06/2018 - 12:07 Test slope just north of Frog Lake Carson Pass Area Snowpack Observation


01/06/2018 - 06:00 Twin Peaks Blackwood Canyon or Ward Canyon Area Avalanche Observation Public
01/06/2018 - 03:00 Elephant's Back Carson Pass Area Avalanche Observation
01/05/2018 - 12:00 Red Lake Peak Carson Pass Area Snowpack Observation ECTP's on facet layer buried below slab.Coverage on N side Red Lake PeakSmall roller balls skier triggered., Forecaster
01/04/2018 - 23:30 Chickadee Ridge Mount Rose Area Snowpack Observation Facets below slab remaining dry to moist.Skier triggered roller balls in low angle terrain, indicating possibility of loose wet avalanche potential. Forecaster
01/04/2018 - 13:00 Mt. Judah Donner Summit Area Snowpack Observation ECTP in an area where the loose weak snow had a small slab on top of it prior to last night's storm.Small loose wet roller balls on a N facing slope at 8000 ft. Forecaster
01/03/2018 - 13:22 below gate #2 N side of Smoothies Squaw Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Guide
Alpenglow Expeditions
01/03/2018 - 13:10 Contact Pass Mount Rose Area Snowpack Observation Minor cracking around my skis on a N_NE aspect at 9200 ft. Looking up at the coverage on N-NE aspects between 8800 and 10000 ft. while standing at 8600 ft. Coverage on E aspects between 8600 and 9600 ft. Forecaster
01/03/2018 - 12:20 West Grouse Blackwood Canyon or Ward Canyon Area Snowpack Observation Thin but supportable snowcover on SE side of Grouse Rock.NE aspect at 8,100' with snowcover 30 cm or less under thick forest canopy. Over 100 cm snowpack in open areas on same slope.Minimal cracking in open below treeline area of soft slab over facets. Forecaster


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