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
12/30/2018 - 12:30 Tamarack Peak Mount Rose Area Snowpack Observation Exposed dirt and Knife hard sastrugi on Hour Glass Educator
Tahoe Mountain School
01/07/2019 - 10:00 Trimmer Peak Luther Pass Area (including Job and Freel) Snowpack Observation ECTP14 at buried facet layer facets under about 40cm of new snow on E aspect at 8000' large roller balls on E aspect with warm/wet new snow Public
01/08/2019 - 12:00 Squaw Ridge Carson Pass Area Snowpack Observation Professional Observer
01/12/2019 - 12:45 Mt. Rose Mount Rose Area Snowpack Observation Public
01/15/2019 - 13:00 Scott Creek Blackwood Canyon or Ward Canyon Area Snowpack Observation Professional Observer
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
01/23/2019 - 09:15 Porcupine Ridge East Shore Area Snowpack Observation SE aspects with dry/wintery snow above 9000 ft at 9:15 am Porcupine Ridge/ST terrain The observation wall of our profile Natural roller balls on E-SE terrain under rocks Public
01/30/2019 - 13:30 Scotts Lake Luther Pass Area (including Job and Freel) Snowpack Observation Melting snow surfaces exposed to full sun. View of the S face of Waterhouse Peak Breakable crust present in some areas that receive partial shade Observation wall of the snowprofile highlighting the layer of buried surface hoar Pieces of buried surface hoar on the underside of a slab from a CT test Public
02/03/2019 - 12:00 Waterhouse proper E-SE side Luther Pass Area (including Job and Freel) Snowpack Observation Public
02/06/2019 - 12:00 Snowboard Bowl Carson Pass Area Snowpack Observation Professional Observer
02/09/2019 - 12:00 Carpenter Ridge Independence Lake Area Snowpack Observation Reactive wind slab avalanche intentionally triggered by ski kick.  N aspect, 8600', wind loaded 35 degree slope.  D1 R4, 100' wide x 50' downslope. Other side of wind slab avalanche Avalanche debris down into trees. Skin track refill was almost immediate in near treeline terrain and very fast in below treeline terrain. Shooting cracks up to 20-30' in wind loaded terrain. Storm slab development in below treeline terrain with cracking around skis. Forecaster
02/11/2019 - 12:30 Tallac Corkscrew Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Public
02/15/2019 - 14:45 Old Lincoln road. Donner Summit Area Snowpack Observation Public
02/17/2019 - 14:30 Lake Mary Donner Summit Area Snowpack Observation Public
02/20/2019 - 12:30 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Newly fallen graupel. Wind features pointing both directions with cornices in the background. Our skin track refilled within an hour from a combination of new snow and light wind loading. New snow had barely covered the previously scoured surfaces leaving variable dust on crust conditions in some exposed areas. Settlement cracks indicating consolidation in the recent snow. Forecaster

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