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
04/02/2019 - 10:00 Echo Lake Echo Summit Area Snowpack Observation A fleeting dash of blue this morning, showing the new snow on the ground and trees. Ski triggered loose wet roller ball activity on a steeper slope. Looking up at the ski triggered loose wet activity. Examining the new snow. Excavated line below the surface was the most wet layer. Recent cohesive roof shedding. I skinned right by this on 3/28 and the snow was still on the roof. Professional Observer
03/04/2019 - 09:30 Carson Pass south Carson Pass Area Avalanche Observation A few inches of soft snow, then a breakable crust, then more soft snow. Small chunk of cornice broke but didn't propagate on slope below. In some areas breakable crust and collapsing soft snow around it created a sinking "snowshoe" effect while skinning. There were multiple similar avalanches that occurred yesterday along this ridge. This is one of the larger ones. Backlit cross section of snow adjacent to avalanche crown. Professional Observer
01/08/2019 - 12:00 Squaw Ridge Carson Pass Area Snowpack Observation Professional Observer
03/07/2019 - 12:00 Indian Valley Ebbetts Pass Area Snowpack Observation Professional Observer
02/23/2019 - 11:30 Flagpole Peak Echo Summit Area Snowpack Observation Mid elevation wind effect. Impressive tree flagging from previous slide activity. Near the ridge evidence of previous E wind activity. Professional Observer
01/15/2019 - 13:00 Scott Creek Blackwood Canyon or Ward Canyon Area Snowpack Observation Professional Observer
12/25/2018 - 12:00 Thunder Mtn Carson Pass Area Snowpack Observation Professional Observer
01/16/2019 - 13:00 near Frog Lake Carson Pass Area Avalanche Observation Crown at midpoint of avalanche. Lowest portion of the debris. Looking up towards the start zone. Snow pushed up against tree by slide. Looking down from where the cornice broke that triggered this slide. Profile of avalanche crown. Facets are by fingers of glove. Shovel blade is roughly at bed surface. Professional Observer
12/08/2018 - 13:00 Elephant's Hump Carson Pass Area Snowpack Observation Professional Observer
01/10/2019 - 12:00 Talking Mt. Echo Summit Area Snowpack Observation Lovely day in the on the ridge. Warm in the sun, but well below freezing in the shade. The new snow was mostly uncohesive, but did show a little slab characteristics. Cornice break in response to a wicked splitboard kick. This is what our PSTs looked like after we completed the tests, almost the same as when we started. Professional Observer
02/06/2019 - 12:00 Snowboard Bowl Carson Pass Area Snowpack Observation Professional Observer
12/19/2018 - 15:00 Frog Lake Ridge Carson Pass Area Snowpack Observation Professional Observer
12/24/2018 - 14:00 Red Lake Peak Carson Pass Area Snowpack Observation Professional Observer
12/29/2018 - 14:00 South shoulder of Stevens Peak Carson Pass Area Snowpack Observation Shady sheltered areas below tree line held very soft faceted snow. Sunny slopes are getting thin and starting to melt out in a few areas. Lots of evidence of previous wind activity. On a ridge area, firm slab over soft weak snow. Reverse skin track, with wind erosion on the east side due to NE winds. Professional Observer
04/04/2019 - 12:15 Genoa Peak East Shore Area Snowpack Observation Rime covered tree in a windy location near Genoa Peak. Rime covered sastrugi growing into the west winds. Professional Observer


Subscribe to Central Sierra Nevada / Lake Tahoe Snowpack, Weather, and Avalanche Observations for California and Nevada from SAC