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
12/20/2018 - 12:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Active wind transport filling in the skin track near the ridge at 7800'. Thin wind slabs not showing much reactivity with snowpack tests. Forecaster
12/25/2018 - 15:00 Castle Peak Donner Summit Area Snowpack Observation ECTP 12 on the summit pitch ascending Castle Peak The slab above the pit cracked quite easily. Another quick pit. ECTP 18 farther up in the NW trees of castle peak. 200 vertical feet below the highest trees on that slope skiers right side. Public
12/31/2018 - 12:00 Mt Tallac Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Professional Observer
01/07/2019 - 12:00 Hidden Peak West Shore Area Snowpack Observation One of the many whumpfs we felt between 6900 and 8300 ft. This one propogated about 100 ft away from us in all directions and left small cracks like the one I am pointing at in the snow surface. Forecaster
01/09/2019 - 11:00 Elephant's Hump Carson Pass Area Snowpack Observation Professional Observer
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
01/16/2019 - 09:30 Picnic Rock Brockway Sawtooth Ridge to Tahoe City Avalanche Observation Public
01/20/2019 - 12:30 Freemont Camp - Heavenly Ski Area East Shore Area Snowpack Observation Public
11/24/2018 - 10:00 Meiss Carson Pass Area Snowpack Observation Professional Observer
12/01/2018 - 12:15 Gareth Feldstein Donner Summit Area Snowpack Observation Wind loading - small cornice 125cm weak top layer roughly 35cm Checking the crust @ 55cm - 30cm Crust @ 55cm Joe - extended column test (Low angle probably prevented negative test results) Wind loading along the ridge-line Lots of wind on the ridge-line Public
12/06/2018 - 11:45 Lincoln Ridge Yuba Pass Area Snowpack Observation Fog conditions below 7,700'. Sunny skies above the inversion layer. Rimed surface snow and plenty of snow available on W aspects for future wind transport. Rimed surface snow. Rimed surface snow. Forecaster
12/10/2018 - 11:45 N End of Janine's Ridge Desolation Wilderness Area (including Emerald Bay) Snowpack Observation 5cm Windslab Public
12/14/2018 - 10:30 Anderson Ridge Donner Summit Area Snowpack Observation High winds but minimal local ridge top transport wind scoured and side loading below the ridge thin and non-reactive wind loading at 10:30a Public
12/18/2018 - 15:00 After Party Independence Lake Area Avalanche Observation Public
12/22/2018 - 11:30 Elephant's Back Carson Pass Area Snowpack Observation Professional Observer


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