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
01/16/2019 - 02:00 Incline Lake Peak Mount Rose Area Avalanche Observation Public
01/16/2019 - 01:30 Bottom of Waterhouse Luther Pass Area (including Job and Freel) Snowpack Observation Educator
Alpine Skills International (ASI)
01/15/2019 - 14:15 Munchkins East Bowl Snowpack Observation

Munchkins Zone Storm Instability 1/15/19

Public
01/15/2019 - 13:15 Incline lake peak Mount Rose Area Snowpack Observation Calm to light winds on Ridge North aspect unsupported convex test slope loose dry/sluff Very small loose dry on 40 degree east aspect Public
01/15/2019 - 13:00 Scott Creek Blackwood Canyon or Ward Canyon Area Snowpack Observation Professional Observer
01/15/2019 - 12:00 Mt. Rose Mount Rose Area Snowpack Observation Surface hoar buried under ~2-3 cm (~1 inch) of new snow. Small failure on a wind-loaded test slope that we think failed on the buried Surface Hoar. Forecaster
01/15/2019 - 11:00 Jakes Peak West Shore Area Snowpack Observation Buried surface hoar was both widespread and reactive in this open terrain both below treeline and near treeline. , Forecaster
01/15/2019 - 08:00 Jake's Peak West Shore Area Snowpack Observation A view of the pit with distinct layers. Snow fall rates picked up to S1 or S2 as we continued to ascend. Minor surface instabilities/slough (NSF and new snow) were easy to trigger in steeper terrain. Public
01/14/2019 - 15:00 North Bowl on Castle Peak Donner Summit Area Snowpack Observation 1/11 Avalanche on Castle Peak Public
01/14/2019 - 12:00 Johnson Canyon Donner Summit Area Snowpack Observation 10 to 12mm surface hoar in open areas near and below treeline. Forecaster
01/14/2019 - 11:00 Hidden Peak West Shore Area Snowpack Observation Surface Hoar was observed above approximately 8000 feet. Surface Hoar Professional Observer
01/14/2019 - 10:15 Chief Creek drainage Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Large surface hoar Guide
Alpenglow Expeditions
01/13/2019 - 15:30 Donner Peak Donner Summit Area Snowpack Observation Educator
Tahoe Mountain School
01/13/2019 - 13:30 East of Grouse Rock Blackwood Canyon or Ward Canyon Area Avalanche Observation Crown of a slide on north facing slope Public
01/13/2019 - 12:00 Heavenly Ski Area East Shore Area Snowpack Observation A view of the pit with distinct layers CT16 Q1 A view of the bottom of the block that released in the CT. Debris from a major wind event is evident. Public

Pages

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