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
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
03/10/2019 - 12:00 Ralston Peak Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Public
03/10/2019 - 12:00 Slab Cliffs Mount Rose Area Snowpack Observation Small loose dry sluffing in steeper terrain. Cold temperatures with periods of snowfall throughout the day. Forecaster
03/10/2019 - 11:45 Castle Ridge Donner Summit Area Snowpack Observation Open areas below Castle Pass were holding several inches fresh snow on top of older soft snow. On the ridge heading towards Castle, the skin track in the middle of this photo was largely obscured by blowing snow after approximately 30 minutes. On a north facing test slope, a shallow but 40 foot wide wind slab occurred in response to a ski kick. Heavily rimed (and beautiful trees) on the NW slopes of Castle. Professional Observer
03/10/2019 - 11:15 Nat Geo, Granite Chief Peak Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation Guide
Alpenglow Expeditions
03/10/2019 - 11:00 Rifle Peak Mount Rose Area Avalanche Observation Public
03/10/2019 - 10:15 Johnson Canyon Donner Summit Area Snowpack Observation Cornice collapses Public
03/09/2019 - 13:15 Blue Lakes Carson Pass Area Avalanche Observation Public
03/09/2019 - 13:00 Frog lake Carson Pass Area Avalanche Observation Public
03/09/2019 - 11:00 Hidden Peak West Shore Area Avalanche Observation Jake's Peak wind slab on N aspect Wind slab remote triggered or natural at ridgeline Public
03/09/2019 - 11:00 Castle Peak Donner Summit Area Snowpack Observation Public
03/09/2019 - 11:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Wind slab on NE aspect that we carefully avoided while ascending to the east ridge. Blowing snow on east ridge, transporting left to right onto N aspect terrain. ECTP-22 on wind slab down 1.5 ft, 1F hard over 4F hard. ECTP-25 on wind slab down 1.5 ft, 1F hard over 4F hard. Old avalanche debris below NE-E aspect wind loaded terrain, likely from natural wind slab on March 6. Forecaster
03/09/2019 - 10:30 West shore emigrant lake Carson Pass Area Avalanche Observation Public
03/09/2019 - 10:30 Echo Peak Echo Summit Area Avalanche Observation Public
03/09/2019 - 09:15 Trimmer Peak Luther Pass Area (including Job and Freel) Snowpack Observation Public


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