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 button above.
Date and time of observation or avalanche occurrence Location Region Observation Type Photos Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
12/27/2019 - 11:45 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation 15mm surface hoar in open below treeline terrain. Widespread surface hoar covering open below treeline avalanche terrain. Surface hoar on wind textured surface in ridgetop avalanche start zone. Ridgetop wind feature covered in surface hoar. More wind affected than 24 hours ago, but covered in surface hoar. Minor cracking at edge of ridgetop wind slab. Forecaster
12/27/2019 - 12:00 Meiss Carson Pass Area Snowpack Observation Professional Observer
12/27/2019 - 12:30 west of Relay peak and "Bronco chutes" Mount Rose Area Avalanche Observation Bronco Chute Public
12/27/2019 - 12:45 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Public
12/28/2019 - 09:00 Wildflower Ridge Donner Summit Area Snowpack Observation Public
12/28/2019 - 11:00 Indian Valley Ebbetts Pass Area Snowpack Observation Professional Observer
12/28/2019 - 11:15 King's Realm Bear Valley Area Snowpack Observation Public
12/28/2019 - 12:00 Mt. Judah Donner Summit Area Snowpack Observation Stubborn hard wind slab on a W facing test slope with some blocks of debris near the bottom. Wind affected surface snow on an ENE aspect on Wild Flower ridge. The snow was still soft but minor scouring had occurred to scallop the surface. Forecaster
12/28/2019 - 12:30 Thompson Peak Luther Pass Area (including Job and Freel) Snowpack Observation Small Surface Hoar and Near Surface Facets Older and larger Surface Hoar that had been previously knocked over Hand hardness indicated a right side up snowpack with about 20 cms of NSFs at the surface Public
12/28/2019 - 12:30 Incline Lake/Slab Cliffs Mount Rose Area Snowpack Observation NNW aspect near treeline with signs of wind effect and drifting on snow surface but no wind slab. Right side up surface snow progressively F to 4F in nearly all areas with the occasional 1 cm surface wind skin as seen here. Forecaster
12/28/2019 - 13:15 Castle Peak Donner Summit Area Snowpack Observation Lots of cracking like this in the NW trees Wind scouring along ridges Public
12/28/2019 - 13:15 Mayflower Ridge Donner Summit Area Snowpack Observation Small windslab on test slope Crown on test slope Wind scouring along ridgelines Another image of widespread wind affect in the Donner Peak area CT19 down 20cm on old (rounding) near surface facets buried during last storm cycle Educator
Tahoe Mountain School
12/28/2019 - 13:45 Tamarack Peak Mount Rose Area Snowpack Observation Public
12/29/2019 - 10:30 NE Ridge of Silver Peak Snowpack Observation Evidence of small windslabs on N facing terrain, leeward to SW winds Evidence of small windslabs on N facing terrain, leeward to SW winds

Wind Transport on NE Ridge of Silver Peak (12-29-19)

Public
12/29/2019 - 12:30 Munchkins/Tahoe City Five Lakes Area Snowpack Observation Public

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