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
03/24/2019 - 10:45 Fireplug Mount Rose Area Avalanche Observation Public
03/24/2019 - 10:30 Ridge line between Castle peak and Basin peak Donner Summit Area Avalanche Observation Public
03/24/2019 - 10:30 Judah Peak Donner Summit Area Avalanche Observation We saw 5 more small slides like this above the snow sheds that seemed to be from yesterday. Wind effect along the Judah Ridge Two slides could be seen looking back at Judah Peak from Donner Peak in at noon. Public
03/24/2019 - 10:00 Tamarack Peak/Fireplug Mount Rose Area Snowpack Observation loose wet slides on fireplug Public
03/24/2019 - 08:00 Castle Pass Donner Summit Area Snowpack Observation Surface Hoar near Castle Pass Looking down to the south from the shoulder of Castle Peak. Educator
Lake Tahoe Community College - Wilderness Education
03/23/2019 - 23:45 Red Lake Peak Carson Pass Area Avalanche Observation Public
03/23/2019 - 15:30 Crater Lake Carson Pass Area Avalanche Observation Reference of crown size and slide surface being old heat crusted layer. Crown area. Approximately 30m wide  Slide ran about 50 m to the next concavity   Public
03/23/2019 - 14:30 Mt. Reba Bear Valley Area Avalanche Observation Public
03/23/2019 - 14:00 Wrights Lake Outside of the Forecast Area Snowpack Observation Public
03/23/2019 - 12:15 Plavada Outside of the Forecast Area Avalanche Observation Skier triggered loose wet on a steeper rollover. Loose wet failure on a test slope Public
03/23/2019 - 12:00 Castle Peak Donner Summit Area Snowpack Observation 6 inches of new snow overnight on the Castle Rd. Well bonded to crust at old/new interface. Ski cut on this a several other wind loaded test slopes produced no results. Enough drifting snow to refill our up track near Castle Pass. 4f hard sun crust on E slopes of Andesite after a period of thinning cloud cover. Forecaster
03/23/2019 - 11:45 Incline Lake Peak Mount Rose Area Avalanche Observation Public
03/22/2019 - 11:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Cloud cover over the forecast area limiting snow surface melt. About 1 cm on recent storm snow over crust on N-NE aspects. Forecaster
03/21/2019 - 16:00 Eagle Lake Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Glide Crack in top of underlying granite slab Public
03/21/2019 - 12:15 Martis Valley West Mount Rose Area Snowpack Observation Constant cracking while skinning Trees holding a dusting of snow on their north faces, beginning at 6800ft Ski penetration 3-4in Layers marked are (from top): new/old snow interface, very weak layer, beginning of melt/freeze snow, end of melt/freeze snow Rounds taken from melt/freeze layer, mostly 1mm diameter, but stuck together in 3-5mm balls Break from crude shovel shear test Public

Pages

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