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
12/03/2018 - 13:00 Rubicon peak West Shore Area Snowpack Observation Surface hoar around 7600ft/ NE Looking west into desolation Guide
Tahoe Mountain School
12/04/2018 - 03:00 Thunder Saddle Carson Pass Area Snowpack Observation Public
12/04/2018 - 11:15 Broken Glass Mount Rose Area Snowpack Observation Public
12/04/2018 - 12:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation 10-15mm surface hoar in open areas near and below treeline This type of open below treeline terrain has even distribution of large surface hoar across slope. Forecaster
12/04/2018 - 14:30 Tamarck Peak East Ridge Mount Rose Area Snowpack Observation Public
12/05/2018 - 12:30 Powderhouse Luther Pass Area (including Job and Freel) Snowpack Observation Public
12/05/2018 - 13:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Skier triggered loose dry avalanche (D1) on N aspect, near treeline, ~7,800'. New snow failing on the buried surface hoar with a shovel tilt test. Forecaster
12/06/2018 - 10:00 Powderhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation Widespread surface hoar in open areas. Above the inversion. Professional Observer
12/06/2018 - 11:00 Red Lake Peak Carson Pass Area Snowpack Observation Professional Observer
12/06/2018 - 11:45 Lincoln Ridge Yuba Pass Area Snowpack Observation Fog conditions below 7,700'. Sunny skies above the inversion layer. Rimed surface snow and plenty of snow available on W aspects for future wind transport. Rimed surface snow. Rimed surface snow. Forecaster
12/06/2018 - 12:00 Castle Peak Donner Summit Area Snowpack Observation 8-10mm surface hoar in Round Valley at 7900'. Rimmed surface snow above 8000', up to 10mm in size. Forecaster
12/07/2018 - 12:00 West Grouse Blackwood Canyon or Ward Canyon Area Snowpack Observation SE aspect below Grouse Rock. 10cm artificial slab created PST 20/100 end on 12/4 SH layer. New surface hoar of 5 to 10 cm seen in West Grouse area. Forecaster
12/07/2018 - 12:30 Tamarack Peak Mount Rose Area Snowpack Observation Very large surface hoar was widespread in the Tamarack Peak area. More surface hoar on in an open area on Tamarack Peak Early season conditions still exist especially at the lower elevations. Forecaster
12/08/2018 - 10:45 Mt. Judah Donner Summit Area Snowpack Observation Surface hoar still present on the summit ridge of Judah indicating that the winds did not get strong enough to destroy it last night. Ski tracks on the windward side of Judah indicating that soft snow is still available for transport if the winds increase. Forecaster
12/08/2018 - 11:30 Castle Peak Donner Summit Area Snowpack Observation Extended column test with no failure, Snow pack was 125cm Surface hoar was seen almost everywhere, except for the most sunny areas. Public

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