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
01/19/2019 - 12:00 English Mountain Independence Lake Area Snowpack Observation Roller balls on the west side of Jackson Meadows Reservoir from rain on snow. Small crown from wet snow avalanche near noted lat/long. Another small crown from wet snow avalanche near noted lat/long. Fog and light rain on NE side of English Mtn. Forecaster
01/19/2019 - 12:30 Trimmer Peak Luther Pass Area (including Job and Freel) Snowpack Observation Localized cracking on wind features Public
01/19/2019 - 12:30 ~30 meters SW of Lake Mary Donner Summit Area Snowpack Observation Public
01/20/2019 - 02:30 ASI windlip Donner Summit Area Snowpack Observation Public
01/20/2019 - 11:30 Carson Pass Carson Pass Area Snowpack Observation Scoured surfaces on the windward aspects. A mix of new snow on crusts and exposed crusts on leeward slopes. Forecaster
01/20/2019 - 12:30 Freemont Camp - Heavenly Ski Area East Shore Area Snowpack Observation Public
01/21/2019 - 10:30 Rubicon Peak West Shore Area Snowpack Observation Public
01/21/2019 - 10:45 Powderhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation Minimal signs of settlement, just a few cracks around trees. Widespread sastrugi in top 200-300 feet of elevation above and below tree line. Above tree line small test slopes showed moderate crack propagation. Small wind slab. Professional Observer
01/21/2019 - 11:00 Hidden Peak West Shore Area Snowpack Observation Wind created surface textures on near the summit of Hidden Peak Small cracking on a wind-loaded test slope. Surface hoar buried about 4 ft. below the surface. Forecaster
01/21/2019 - 12:00 Tamarack Peak Mount Rose Area Snowpack Observation Intense snow transport on ridges, peak, and even below treeline from strong NW/N winds Small wind loaded test slopes in near treeline terrain did not signs of wind slab propagation Limited cracking on small wind loaded features. Forecaster
01/21/2019 - 15:30 Mt. Rose proper (not the ski area) Mount Rose Area Avalanche Observation Public
01/22/2019 - 09:15 The 11s - Trimmer Peak Snowpack Observation Graupel on the surface of my skis Graupel can be seen piled up by the wind on an exposed ridge E-NE wind transporting snow over the false summit of Trimmer Peak Minor settlement found around some trees Cracking of windslabs was isolated and small Public
01/22/2019 - 11:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Digging 2m deep test pit. Surface hoar still well preserved buried 1m down, but unreactive. NE winds scoured ridgetop and upper portion of N aspect start zones down to rain crust. Settlement of most recent storm snow. Forecaster
01/22/2019 - 11:15 Relay Peak Mount Rose Area Snowpack Observation Public
01/22/2019 - 11:45 Angora Peak Echo Summit Area Snowpack Observation Surface hoar present from between 7000 - 8400 at all aspects in the morning. Settlement cone. Ridge just below Angora summit. Professional Observer


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