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
02/08/2019 - 11:45 tallac Desolation Wilderness Area (including Emerald Bay) Avalanche Observation Public
02/23/2019 - 10:30 Ralston Peak Desolation Wilderness Area (including Emerald Bay) Snowpack Observation ECTP10 4 inches down on a windslab near the Ralston Summit, see observation location. Windslab failure from skinning above a tree moat. Ski track refilling from wind transport after 90 minutes. Public
03/10/2019 - 12:30 NE of Echo Peak Echo Summit Area Snowpack Observation CT11 & CT18 SP at 95 down on Graupel just above the Feb 14 rain crust. Graupel on the Feb 14 Rain crust at 95cm down. Public
03/28/2019 - 13:15 Just north of Mt Lola Independence Lake Area Avalanche Observation Public
01/23/2019 - 12:30 Back side of Houghton Mount Rose Area Snowpack Observation Public
11/29/2018 - 12:30 Relay Peak Mount Rose Area Avalanche Observation Small windslab along ridge line Public
03/13/2019 - 12:00 Davis Creek Mount Rose Area Avalanche Observation wet debris visible in runout Public
12/19/2018 - 13:45 West ridge of peak 9,422’ Carson Pass Area Snowpack Observation Public
02/14/2019 - 17:30 Round hill Mount Rose Area Snowpack Observation Rain runnels Small roller balls Open water griff creek Public
02/28/2019 - 10:45 Five miles east of China Wall OHV Outside of the Forecast Area Avalanche Observation Public
03/17/2019 - 15:00 Castle Peak Donner Summit Area Snowpack Observation Wet surface snow at lower elevation Roller balls of various sizes on South face East facing cornices with roller balls Thin ice crust forming across surface High elevation trees holding their N facing snow Cornices on North bowl of castle Public
01/14/2019 - 15:00 North Bowl on Castle Peak Donner Summit Area Snowpack Observation 1/11 Avalanche on Castle Peak Public
02/17/2019 - 16:00 Trestle Peak Donner Summit Area Avalanche Observation Public
03/04/2019 - 02:00 South Face of Slide Mountain Mount Rose Area Snowpack Observation Ski cut Public
01/16/2019 - 13:00 2.5k west of peak 8740 Independence Lake Area Avalanche Observation Test slope avalanche on small wind loaded cornice Shooting crack from snowmobile ski tip Shooting crack from snowmobile track Public


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