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.
Date and time of observation or avalanche occurrence Location Region Observation Type Photos Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
02/17/2019 - 12:00 Tamarack Peak Mount Rose Area Snowpack Observation ECTN on a sheltered NE facing slope in below treeline terrain. Small skier-triggered cracking on a steep wind-loaded test slope Refrigerator sized cornice dropped onto a wind-loaded test slope with no results. Large cornices looming over heavily wind-loaded slopes. Some mostly buried debris is barely visible on the slope below the largest cornice. Forecaster
04/17/2019 - 11:30 Stevens Peak Carson Pass Area Avalanche Observation D1 loose wet on an E facing slope on Stevens Skier triggered rollerballs and pinwheels Boot top deep wet snow with a ski supportable but not boot supportable crust. Wind affected colder snow on the ridge above 9300 ft. Forecaster
03/04/2019 - 12:00 Becker Ridge Echo Summit Area Avalanche Observation Loose wet avalanches occurring yesterday during rapid warming conditions near Hwy 50 below Echo Pass. Loose wet activity from yesterday on Ralston Peak Loose wet activity from yesterday off of Becker Ridge. Forecaster
01/13/2019 - 12:00 Upper Cold Stream Canyon Donner Summit Area Snowpack Observation Very large cornice hanging over a steep slope. 1 to 2 cm large surface hoar grains. Old cornice and avalanche debris. What looked like an old avalanche crown on a steep low elevation slope. Forecaster
03/25/2019 - 12:00 Elephants Hump Carson Pass Area Snowpack Observation Snow transport in near treeline NW-N terrain. Very small (1-2'') wind slabs that were reactive in some wind loaded NW-N-NE aspects. ECTN on small wind loaded test slope.  3-4'' wind slab on top of less dense snow, mainly stellars, on top of a previous melt freeze crust. 2'' of wet surface snow existed by 12:15pm. Softening surface snow on southerly aspects by 11:00am Forecaster
02/19/2019 - 13:30 Donner Summit Donner Summit Area Snowpack Observation Skier triggered shooting crack on a low angle W aspect Skier cracking on a low angle slope wind-loaded by NE winds and previously undercut by the skin track. Variable wind scoured surfaces with exposed rain crust in some areas. Large surface hoar that was laying flat on many sheltered N-NE-E aspects. Forecaster
02/03/2019 - 12:00 Hidden Peak West Shore Area Snowpack Observation Blowing snow with limited visibility at 9200'. Shooting cracks off of skis while skinning up, at 9000' on a NE aspect. At 7600', around 4'' of wet snow on top of a supportable crust. Above 8200', 12'' of new snow. Forecaster
03/08/2019 - 11:15 Lincoln Ridge Yuba Pass Area Snowpack Observation One of many large cornices in this area. Sustained moderate to intense blowing snow on the ridgetop. Forecaster
02/04/2019 - 12:00 Mt. Rose Backcountry Mount Rose Area Avalanche Observation Mostly buried avalanche on Tamarack Peak Mostly filled in avalanche crown on Relay Peak Cornice debris from a mostly buried cornice collapse and wind slab avalanche on Tamarack Peak Forecaster
12/03/2018 - 12:30 Mt. Judah Donner Summit Area Snowpack Observation 10 - 15 mm surface hoar was widespread in the Mt. Judah area. IT did start to melt some on slopes with direct sun-exposure later in the day. Cornice pieces and loose dry surface hoar sluffs on Wild Flower Ridge. Cloud cover rolling into the area in the afternoon. Forecaster
03/14/2019 - 12:30 Incline Lake Peak and Slab Cliffs Mount Rose Area Snowpack Observation Scoured surfaces on a NE aspect along the summit ridge of Incline Lake Peak. Raised ski tracks on an E aspect near the summit ridgeline ECTP on a test slope wind-loaded by the NE winds. Ski kick triggered shooting crack on a previously undercut test slope wind-loaded by the NE winds. ECTN on a test slope wind-loaded by SW winds. Scoured slopes and large cornices on the summit of Incline Lake Peak. Settlement crack in below treeline terrrain. Tiger striping indicating cross-loading on a W / NW aspect. Forecaster
01/18/2019 - 13:00 Incline Lake Peak Mount Rose Area Snowpack Observation Small natural cornice failure with small wind slab avalanche. Large and fragile cornices along ridgeline. Pointing to buried surface hoar down 140cm from surface. Large surface hoar under the DT that failed.  Forecaster
04/03/2019 - 14:30 Tamarack Lakes Trailhead Mount Rose Area Avalanche Observation Human triggered loose wet avalanches on Prolitariate Bowl. Loose wet avalanche activity on Fireplug. Forecaster
02/14/2019 - 11:30 Tamarack Peak Mount Rose Area Snowpack Observation PST slab fracture result on buried graupel layer. ECTN results at multiple heights within the storm snow. Minor wind slab cracking on a small ridgetop test slope. Forecaster
03/21/2019 - 12:00 Elephants Back Carson Pass Area Snowpack Observation Very small roller balls as daytime warming occurred at noon. Sun patches throughout the day with periods of full sun. Very small cracking in wind loaded terrain. Minor wind scouring along Frog Lake Ridge. Forecaster

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