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
01/11/2019 - 11:45 Little Alaska, Ward Canyon, Lake Tahoe Blackwood Canyon or Ward Canyon Area Snowpack Observation Location where large, overhanging cornice broke off today. Public
12/14/2018 - 12:30 Twin Peaks Blackwood Canyon or Ward Canyon Area Snowpack Observation Lenticular clouds and some wind transport along the Sierra Crest near Twin Peaks. ECT test with no fractures from a near treeline line test slope. Small wind pillow with some cracking. The wind slab only extended a few feet downslope. Forecaster
01/13/2019 - 13:30 East of Grouse Rock Blackwood Canyon or Ward Canyon Area Avalanche Observation Crown of a slide on north facing slope Public
01/16/2019 - 11:30 Below Scott Peak Blackwood Canyon or Ward Canyon Area Snowpack Observation Surface hoar buried under 65cm of new snow Surface hoar grains removed from bottom of slab on ECTP6 Public
11/23/2018 - 10:30 Grouse Rock Blackwood Canyon or Ward Canyon Area Snowpack Observation Public
01/15/2019 - 13:00 Scott Creek Blackwood Canyon or Ward Canyon Area Snowpack Observation Professional Observer
12/26/2018 - 14:00 Munchkins Zone - East Bowl Blackwood Canyon or Ward Canyon Area Snowpack Observation Looking south down the ridge. Scoured western slopes and small cornices on the eastern slopes Small cornice broke easily after second kick. Cornice break from underneath. Public
02/20/2019 - 11:00 Polaris Point Blackwood Canyon or Ward Canyon Area Snowpack Observation Periodic snow showers S1 to S5. S5 in this photo at 11:15 am. Forecaster
12/18/2018 - 10:15 Shirley Canyon Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation Shooting Crack Small windslab avalanche Guide
Alpenglow Expeditions
12/20/2018 - 12:00 Shirley Canyon Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation New Cornice In Shirley Canyon Guide
Alpenglow Expeditions
02/05/2019 - 12:00 Sierra Crest above Bradley Hut Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation Educator
Donner Summit Avalanche Seminars
12/22/2018 - 15:00 Shirley Canyon Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation 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

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Guide
Alpenglow Expeditions
12/14/2018 - 11:00 Pole creek road Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Public
02/09/2019 - 23:00 Ridge between Forks of Coldstream Creeks Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation Public

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