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.

Location Region Observation Type Date and time of observation or avalanche occurrence Avalanche observation video Avalanche photos Snowpit videos (tests, etc) Snowpack photos Snowpit or crown profile photo or graph Observation made by
Andesite Ridge Donner Summit Area Snowpack Observation 12/02/2017 - 13:00 Educator
Tahoe Mountain School
Mt. Lola Independence Lake Area Snowpack Observation 12/02/2017 - 12:00 Large SH existed in lower meadow but not on open slope above.  8000', NE-E aspects. Evidence of wind destroyed SH on this open slope.  8200', N aspect. Forecaster
Andesite Peak Donner Summit Area Snowpack Observation 12/02/2017 - 12:00 Photo 1: Average height of snow near summit of Andesite Photo 2: South Face of Castle Guide
Alpenglow Expeditions
Mt Houghton Mount Rose Area Avalanche Observation 12/02/2017 - 12:00 Public
Tamarack Peak Mount Rose Area Snowpack Observation 12/01/2017 - 12:00 Protected treed area with 6-8'' of NSF's on top of P hard rain crust. F hard NSF's, mostly .5mm in size. Forecaster
Carson Pass Carson Pass Area Snowpack Observation 12/01/2017 - 11:00 Widespread large obvious Surface Hoar crystals. Large Surface Hoar crystals Surface hoar and near surface facets comprised top 4-6 inches of snow. Professional Observer
Judah Ridge just below reflector towers near treeline Donner Summit Area Snowpack Observation 11/30/2017 - 13:45 Public
Tamarack Peak and Fireplug Mount Rose Area Snowpack Observation 11/30/2017 - 11:00 Forecaster
Rubicon Peak West Shore Area Snowpack Observation 11/29/2017 - 12:45 4mm surface hoar noted in below treeline openings. One of several hand pits indicating good bonding of recent storm snow to the rain cust below. Forecaster
Castle Peak Donner Summit Area Snowpack Observation 11/29/2017 - 12:00 Cornices above the N side of Castle Peak Surface hoar on a N aspect at 8500 ft. Small wind slab on a wind loaded test slope. The slab only measured about 5-10 cm (2-4 in) thick and did not extend downslope very far. ECTN on a wind loaded test slope at 8800 ft. on a NE aspect at the coordinates attached to the observation. Forecaster
Roller Pass Donner Summit Area Snowpack Observation 11/28/2017 - 13:30 Public
Castle Peak Donner Summit Area Snowpack Observation 11/28/2017 - 11:45 Blowing snow near the summit of Castle Peak as observed from vicinity of noted lat/long. Forecaster
Incline Peak Mount Rose Area Avalanche Observation 11/28/2017 - 07:22 Public
Tamarack Peak Mount Rose Area Snowpack Observation 11/27/2017 - 12:00 East Ridge of Tamarack Peak.  Some scouring of previously wind loaded terrain.  Ski kicks on small test slopes had limited results with new snow. Forecaster
Frog Lake Carson Pass Area Snowpack Observation 11/27/2017 - 12:00 New snow on top, wet snow below. By 11am, sun exposed snow was melting. Professional Observer

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