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 http://www.snowpilot.org/. 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
01/01/2016 - 11:00 Ginny Lake Mount Rose Area Snowpack Observation Forecaster
03/17/2016 - 13:00 Stevens Peak Carson Pass Area Snowpack Observation Forecaster
11/22/2017 - 10:30 Castle Peak Donner Summit Area Snowpack Observation Icy crusts on the northerly aspects that ranged from breakable to supportable.Breakable rain crust and rain runnels in a meadow at 7800 ft. Forecaster
03/22/2018 - 17:00 Desolation Wilderness Desolation Wilderness Area (including Emerald Bay) Avalanche Observation Forecaster
11/21/2016 - 12:00 Red Lake Peak Carson Pass Area Snowpack Observation Forecaster
02/03/2017 - 13:00 Donner Peak Donner Summit Area Snowpack Observation Wind slab cracking on an undercut test slopeShooting crack on a wind loaded test slope Forecaster
01/20/2016 - 13:30 Rubicon West Shore Area Snowpack Observation Forecaster
01/26/2018 - 12:30 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Loose dry sluff triggered by a ski cut on a steep below treeline test slope. N aspect 7700 ft.Small cracking on a wind-loaded test slope along the ridge. NE aspect 8100 ft. Forecaster
03/19/2017 - 11:30 Stevens Peak Carson Pass Area Snowpack Observation 4 inches of snow surface refreeze on open slopes above 8,000'.Very supportable conditions at 11:15 am on SE aspect above 8,000'.Slightly increase depth of wet snow at noon on SE aspect above 8,000', but still very supportable.Intertionally skier triggered small loose wet avalanche on SE aspect at 8,200' at 12:15pm.Same small loose wet avalanche in previous photo. Forecaster
01/14/2017 - 12:00 Ta,arack Peak Mount Rose Area Snowpack Observation Surface hoar was widespread in the areaThin rime crust on the snow surface with surface hoar on top of it. Forecaster
01/05/2016 - 11:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Forecaster
04/01/2018 - 11:45 Red Lake Peak Carson Pass Area Snowpack Observation Limited signs of loose wet instabilities at 11:45am on East Face gullies. Snow was mostly supportable with 3-4'' of wet snow at 8000' at 11:45am. Forecaster
11/28/2016 - 12:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Forecaster
01/03/2018 - 12:20 West Grouse Blackwood Canyon or Ward Canyon Area Snowpack Observation Thin but supportable snowcover on SE side of Grouse Rock.NE aspect at 8,100' with snowcover 30 cm or less under thick forest canopy. Over 100 cm snowpack in open areas on same slope.Minimal cracking in open below treeline area of soft slab over facets. Forecaster
02/25/2017 - 12:00 Jakes Peak West Shore Area Snowpack Observation Forecaster

Pages

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