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
01/23/2019 - 11:30 Castle Peak Donner Summit Area Snowpack Observation Wind scoured N aspect terrain. Looking S along Andesite Ridge. Significant wind scouring across the ridgetop. Eroded cornices above SE aspect terrain. Wind scoured N aspect terrain at treeline. Significant settlement of recent storm snow on E side of Andesite. Forecaster
01/31/2019 - 11:30 Castle Peak Donner Summit Area Snowpack Observation Professional Observer
11/29/2018 - 11:30 Castle Peak Donner Summit Area Snowpack Observation High intensity wind loading at ridge top above treeline. High intensity wind loading at ridge top above treeline. Minor skier triggered cracking of newly formed wind slabs. Forecaster
12/17/2018 - 13:00 Castle Peak Donner Summit Area Snowpack Observation Small windslab under 4cm of soft snow cracking The wind affected layer that broke in the previous photo. Soft snow removed on left side to show the slab. ECTN 12 @ the new windslab layer. Public
12/01/2018 - 07:45 Castle Peak Donner Summit Area Avalanche Observation Public
12/15/2018 - 12:15 Castle Peak NE Face Donner Summit Area Snowpack Observation NE Slopes on Castle Peak Steep entrance with cornice NE face access trough hole in rock band Large cornices on N ridge Public
02/06/2019 - 11:00 Centerville Peak East Shore Area Snowpack Observation Old avalanche debris from a cornice fall that was partially covered by new snow Deep and soft new snow Evidence of partially buried avalanche debris is highlighted Snow coverage near 5,400 ft elevation in the Carson Valley Public
02/12/2019 - 10:30 Centerville Peak Luther Pass Area (including Job and Freel) Snowpack Observation Settlement of recent storm snow of a few inches was obvious around most N facing trees at 9,000 ft. Intense snow transport over Freel Peak Wind texture snow in the foreground with small wind slabs developing on the opposite slope Public
12/28/2018 - 12:00 Chickadee Ridge Mount Rose Area Snowpack Observation Public
01/14/2019 - 10:15 Chief Creek drainage Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Large surface hoar Guide
Alpenglow Expeditions
01/19/2019 - 11:15 Chief Creek drainage Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation buried surface hoar propagation saw test (pst 20/130 end) Snowpack settlement


Alpenglow Expeditions
02/10/2019 - 11:30 Cottonwood Hill Sawtooth Ridge to Tahoe City Snowpack Observation ECTN14 @ 45cm down. After 30 taps and no failure, we pulled on the back of the column and it broke cleanly. Public
02/05/2019 - 01:00 Crag Peak West Shore Area Avalanche Observation Crown line visible mid slope on Crag Peak.  Seen from Jakes Peak View into Desolation Wilderness and Dicks Peak.  Some avalanche activity could be made out in the distance but most was covered up by additional snow. Forecaster
02/05/2019 - 09:30 Davis Creek Mount Rose Area Avalanche Observation Avalanche below the drawn arrow. Crown with ski/snowboard tracks entering. Drawn arrows pointing to two tracks. Holes from minimal partial burials (circled). View from toe of debris. Crown refilled by 6 inches of storm snow. Entrance tracks faintly visible from upper right. Looking down right flank. Forecaster
02/07/2019 - 12:00 Davis Creek Mount Rose Area Snowpack Observation Davis Creek area as seen on Feb 7 with Feb 5 avalanche noted below arrow. Forecaster


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