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
01/31/2019 - 10:15 Johnson Canyon Donner Summit Area Snowpack Observation 2 inches of corn on a supportable melt-freeze layer on a W aspect at 1:15 Crack in the snowpack as a cornice pulls away from the ridge. Forecaster
02/03/2019 - 13:30 Powderhouse Luther Pass Area (including Job and Freel) Snowpack Observation Professional Observer
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
02/09/2019 - 15:00 Brockway Summit Sawtooth Ridge to Tahoe City Snowpack Observation Small cracking in a very soft slab. The larger cracks we saw later were approximately the same depth. Public
02/12/2019 - 12:30 The burn in Meyers Echo Summit Area Avalanche Observation Public
02/16/2019 - 12:00 Powderhouse Luther Pass Area (including Job and Freel) Snowpack Observation Public
11/27/2018 - 11:00 Echo/Becker Ridge Echo Summit Area Snowpack Observation Pit location at 8,000', N aspect. 35-40 cm snow cover on ridgetop at ~7,800' with evidence of previous rain on snow. Another view of snow cover on ridgetop at ~7,900'. Forecaster
12/02/2018 - 10:45 Red Lake Peak - Above Crater Lake Carson Pass Area Avalanche Observation Just before the avalanche was triggered. The skier that triggered it just did a ski cut and then a few more turns with no reaction other than loose sluff. The avalanche would be triggered on the next 1 or 2 turns. The skier that triggered the avalanche took this photo of the loose dry sluff just before the avalanche was triggered. Avalanche debris field. The path dog legs out of sight to the left. Looking back at the upper path of the avalanche. You can ski where the skier went over the buried rocks but was able to ski to safety. The upper crown is 12-14" and lower crown 24-30". Overview of avalanche crown. The first ski cut is visible as well as where the skier stopped after releasing the loose sluff. 24-30" avalanche crown Upper bowl of Red Lake peak is visible with previous ski tracks. The lower part of the avalanche path is obscured by a small ridge line with trees. Public
12/06/2018 - 11:00 Red Lake Peak Carson Pass Area Snowpack Observation Professional Observer
12/09/2018 - 14:00 Mt. Tallac Desolation Wilderness Area (including Emerald Bay) Avalanche Observation Forecaster
12/16/2018 - 11:30 Tamarack Peak Mount Rose Area Snowpack Observation In a few locations we found small pockets of wind slab overlaying faceted snow. Evidence of previous blowing rocks on a lee slope. Professional Observer
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


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