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
12/03/2018 - 13:00 Rubicon peak West Shore Area Snowpack Observation Surface hoar around 7600ft/ NE Looking west into desolation Guide
Tahoe Mountain School
02/25/2019 - 10:15 Deep Creek Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Small cornice collapse Shooting crack Guide
Alpenglow Expeditions
03/16/2019 - 13:00 Johnson Canyon West Face Donner Summit Area Avalanche Observation Guide
Alpine Skills International (ASI)
02/12/2019 - 10:45 above Crystal Bay Mount Rose Area Snowpack Observation Guide
Donner Summit Avalanche Seminars
01/13/2019 - 11:30 Needle Peak area Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Cornice collapse and wind scour Surface hoar


Alpenglow Expeditions
02/09/2019 - 12:30 Shirley Canyon Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation Low vis photo of shooting cracks and small wind slab avalanche, skier triggered Guide
Alpenglow Expeditions
01/23/2019 - 13:30 Castle Peak Donner Summit Area Avalanche Observation Small loose wet avalanches on south side castle peak Guide
Tahoe Mountain School
02/03/2019 - 13:00 Shirley Canyon Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Moderate cracking in wind lip in open below-treeline terrain, 7000'. Small 6-8" deep wind slab failed on test slope, NE aspect at 7000'. Guide
Alpenglow Expeditions
02/10/2019 - 13:15 Below Poulsen's Peak, Olympic Valley Sawtooth Ridge to Tahoe City Snowpack Observation Guide
Alpenglow Expeditions
02/09/2019 - 13:15 Round Valley Bear Valley Area Avalanche Observation Guide
California Ski Guides
01/14/2019 - 10:15 Chief Creek drainage Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Large surface hoar Guide
Alpenglow Expeditions
12/06/2018 - 10:00 Powderhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation Widespread surface hoar in open areas. Above the inversion. Professional Observer
01/05/2019 - 16:30 Becker Ridge Echo Summit Area Snowpack Observation Professional Observer
01/01/2019 - 13:00 Indian Valley Ebbetts Pass Area Snowpack Observation Professional Observer
02/06/2019 - 10:00 Flagpole Peak Echo Summit Area Snowpack Observation Avalanche debris from a previous slide was buried under about a foot of soft snow. Minor wind effect observed at the saddle near the summit. Snow was still very soft. Some trees at the summit ridge still held snow despite previous wind and current direct sun. Tree wells were deep. Professional Observer


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