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
12/15/2019 - 13:45 Paulson’s Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Public
12/16/2019 - 11:30 Grouse Rock Blackwood Canyon or Ward Canyon Area Snowpack Observation E Wind transport Cornices Rimed surface hoar NW Tree Line 12-15mm surface hoar Professional Observer
12/16/2019 - 11:45 Ward Canyon ("Avagator" gully) Blackwood Canyon or Ward Canyon Area Avalanche Observation Public
12/16/2019 - 12:00 Blue Lakes Carson Pass Area Snowpack Observation Professional Observer
12/16/2019 - 12:00 Ophir Peak Mount Rose Area Snowpack Observation Forecaster
12/16/2019 - 12:00 Cinder Cone Blackwood Canyon or Ward Canyon Area Avalanche Observation You can see the skier on a little pitch lookers right that triggered it For a better view of the surroundings, to show location Public
12/16/2019 - 12:15 Roundtop Carson Pass Area Snowpack Observation Easy cracking in wind blown snow above skin track. This ridge area was scoured of new snow down to old 12/12 rain crust. Great day to observe wind altered snow. Wind effected snow. Sastrugi More easy cracking in wind drifted snow above the skin track. Professional Observer
12/17/2019 - 11:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Hard wind slab at treeline with obvious snow surface texture that we chose to avoid. 10mm surface hoar on a slight NE aspect at ~7,150'. Forecaster
12/18/2019 - 06:00 Tamarack Peak Mount Rose Area Snowpack Observation Public
12/18/2019 - 11:45 Elephants Hump Carson Pass Area Avalanche Observation Left side of wind slab avalanche Partially filled in crown. Hard wind slab debris down into trees Around corner on to adjacent aspect. Wind scouring down to the Dec 12 rain crust. Forecaster
12/18/2019 - 13:00 Mt. Judah Donner Summit Area Snowpack Observation Guide
Alpenglow Expeditions
12/19/2019 - 12:00 Elephants Hump Carson Pass Area Avalanche Observation Looking north from the far climbers left flank, over 500' to the dead tree. Looking from the dead tree towards the climbersleft flank past the large rock midslope. Partially filled in crown line with avalanche debris below. On the far climbers right flank of avalanche Hard slab debris down into trees. Shooting cracks through lower angle terrain connecting the 2 steeper avalanche paths. Crown line profile on lower climbers left flank. 1' deep pencil hard wind slab. Forecaster
12/19/2019 - 14:30 Rubicon Peak West Shore Area Snowpack Observation sastruigi scoured and loaded Professional Observer
12/20/2019 - 03:15 Wild flower Ridge Donner Summit Area Snowpack Observation Educator
Alpine Skills International (ASI)
12/20/2019 - 11:00 Mt. Judah Donner Summit Area Snowpack Observation Drifting snow over Wildflower Ridge cornice. Soft wind slabs lower on the peak. Forecaster

Pages

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