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
01/21/2019 - 10:45 Powderhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation Minimal signs of settlement, just a few cracks around trees. Widespread sastrugi in top 200-300 feet of elevation above and below tree line. Above tree line small test slopes showed moderate crack propagation. Small wind slab. Professional Observer
01/21/2019 - 10:30 Rubicon Peak West Shore Area Snowpack Observation Public
01/20/2019 - 12:30 Freemont Camp - Heavenly Ski Area East Shore Area Snowpack Observation Public
01/20/2019 - 11:30 Carson Pass Carson Pass Area Snowpack Observation Scoured surfaces on the windward aspects. A mix of new snow on crusts and exposed crusts on leeward slopes. Forecaster
01/20/2019 - 02:30 ASI windlip Donner Summit Area Snowpack Observation Public
01/19/2019 - 12:30 Trimmer Peak Luther Pass Area (including Job and Freel) Snowpack Observation Localized cracking on wind features Public
01/19/2019 - 12:30 ~30 meters SW of Lake Mary Donner Summit Area Snowpack Observation Public
01/19/2019 - 12:00 English Mountain Independence Lake Area Snowpack Observation Roller balls on the west side of Jackson Meadows Reservoir from rain on snow. Small crown from wet snow avalanche near noted lat/long. Another small crown from wet snow avalanche near noted lat/long. Fog and light rain on NE side of English Mtn. Forecaster
01/19/2019 - 11:45 Mt. Rose Mount Rose Area Snowpack Observation Public
01/19/2019 - 11:15 Chief Creek drainage Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation buried surface hoar propagation saw test (pst 20/130 end) Snowpack settlement

20190119

Guide
Alpenglow Expeditions
01/18/2019 - 13:00 Incline Lake Peak Mount Rose Area Snowpack Observation Small natural cornice failure with small wind slab avalanche. Large and fragile cornices along ridgeline. Pointing to buried surface hoar down 140cm from surface. Large surface hoar under the DT that failed.  Forecaster
01/18/2019 - 12:30 Powderhouse Luther Pass Area (including Job and Freel) Snowpack Observation Public
01/18/2019 - 11:00 Near Frog Lake Carson Pass Area Snowpack Observation Settlement cone present first thing in the morning. Crown from a natural avalanche during storm. Several cornices were pulling away and revealing cracks. Down 70 cms adjacent to the old crown, 5-10mm surface hoar crystals. Around noon a wet fog rolled through coating everything in rain droplets. Professional Observer
01/18/2019 - 10:15 Shirley Canyon Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Minor wind slab cracking Large cornice drop, no slab failure Early stage settlement ring Roller Balls Profile Guide
Alpenglow Expeditions
01/17/2019 - 13:00 Brockway Summit Sawtooth Ridge to Tahoe City Snowpack Observation Isolating the column took some digging. The layer of with potential buried surface hoar was knee level Public

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