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. This program is available as a free download at http://www.snowpilot.org/. A video on how to download and use this program is available here. Please send us your observations using the buttons below.

Location Region Observation Type Date and time of observation or avalanche occurrence Avalanche observation video Avalanche photos Snowpit videos (tests, etc) Snowpack photos Snowpit or crown profile photo or graph Observation made bysort descending
1 km W of Castle Peak Donner Summit Area Snowpack Observation 12/19/2016 - 13:00 Educator
Donner Summit Avalanche Seminars
Mt. Rose Highway Mount Rose Area Avalanche Observation 01/11/2017 - 12:00 Relay Peak.  East Face, 10,200'.Fireplug.  E/SE. 9200'.Rose Knob/3rd Creek. S aspect. 9400'. Incline Lake Peak.  SE aspect, 9200'.Mt. Houghton.  S/SE aspect, 10,000'.Mt. Houghton.  SE aspect, 8800'. Forecaster
Incline Lake Peak Mount Rose Area Snowpack Observation 12/17/2016 - 12:45 Forecaster
Frog Lake Cliffs Carson Pass Area Avalanche Observation 02/07/2017 - 04:00 Forecaster
East Ridge of Relay Peak Mount Rose Area Snowpack Observation 11/23/2016 - 15:15 Forecaster
Bronco Chutes Mount Rose Area Avalanche Observation 12/16/2016 - 07:00 Looking up at several crowns that likely happened on 12/16 at the end of the recent storm.A closer look at some of those crowns. Forecaster
Ellis Peak Blackwood Canyon or Ward Canyon Area Snowpack Observation 12/06/2016 - 12:00 Forecaster
Negro Canyon Donner Summit Area Avalanche Observation 01/10/2017 - 11:30 Intentially skier trigger wind slab on small test slopeWind slab failing within storm snow about 4-6'' above the old snow rain crust interface. Forecaster
Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation 02/04/2017 - 14:30 ECTP 16 28cm below the surface at a density change between a dense heavy wind slab and softer storm snow 2m long ECTN 16 on the same layer as the ECTP Rain runnels and wet sticky snow existed on slopes below 7000 ft. Settlement cracks around a tree at 7500 ft. on a N aspect Forecaster
Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation 11/08/2016 - 12:00 Forecaster
Relay Peak Mount Rose Area Snowpack Observation 11/20/2016 - 11:30 Forecaster
Andesite Peak Donner Summit Area Avalanche Observation 01/20/2017 - 15:45 D2 Wind slab avalanche triggered by a small cornice piece Small avalanche triggered by a larger piece of corniceCracking in the storm snow on in below treeline terrain Forecaster
Ophir Peak Mount Rose Area Snowpack Observation 12/22/2016 - 12:00 Forecaster
Andesite Ridge Donner Summit Area Avalanche Observation 01/04/2017 - 13:00 Partially covered up avalanche debris.Natural avalanche on NE-E aspect wrapping around rock feature.  125' wide x 200' long.Wind slab avalanche with up to 3' crown.  Covered in by additional snow. Forecaster
Red Lake Peak Carson Pass Area Snowpack Observation 12/03/2016 - 13:30 Forecaster

Pages

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