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 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 Videos Observation made by
02/01/2018 - 13:30 Crest above Pole Creek Donner Summit Area Snowpack Observation Old wind slab avalanche above Deep CreekLimited Coverage Near AndersonOld wind slab and cornice debris Guide
Tahoe Mountain School
02/01/2018 (All day) Mt. Lola/Upper Cold Stream Independence Lake Area Snowpack Observation No signs of problematic stability in testpit.Skier triggered roller balls on ESE aspect at ~8,700'.Skier triggered roller balls on E aspect at ~8,700'. Forecaster
01/31/2018 - 13:00 Castle Peak Donner Summit Area Snowpack Observation Large cornices exist along the Castle/Basin Ridgeline.  Forecaster
01/31/2018 - 11:00 Slab Cliffs Mount Rose Area Snowpack Observation Maximum extent of loose wet instability observed. SE aspect at 9,640' at 1:40pm. Wet surface snow only 1.5 inches deep. Forecaster
01/31/2018 - 10:00 Becker Peak Echo Summit Area Snowpack Observation Snow under tree cover was wet and unsupportive by 8:30am.Previous wet loose avy activity on north facing slope.Partial ice/snow coverage on Echo Lake. Professional Observer
01/30/2018 - 13:00 Lake of the Woods Independence Lake Area Snowpack Observation Snowpack tests in the crown of an avalanche thought to have occurred during or after the last storm cycle.Wet surface snow on E aspects in late morning hours. Forecaster
01/29/2018 - 13:45 Elephant's Hump Carson Pass Area Snowpack Observation Skier triggered pinwheels and roller balls on a NE aspect at 8400 ft. at 1pm. Forecaster
01/29/2018 - 13:10 National Geographic Bowl, Granite Chief Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Guide
Alpenglow Expeditions
01/29/2018 - 13:00 North Castle Peak Donner Summit Area Snowpack Observation , , Public
01/29/2018 - 11:45 Ophir Peak Mount Rose Area Snowpack Observation Small surface roller balls on northerly aspects, below 9000', in below treeline terrain.  Some of these were from yesterday.More surface roller balls below 8500' on northerly aspects. Forecaster
01/29/2018 - 09:00 Anderson Peak Donner Summit Area Snowpack Observation Public
01/28/2018 - 13:00 Incline Peak Mount Rose Area Snowpack Observation Public
01/28/2018 - 12:30 Mt. Judah Donner Summit Area Snowpack Observation Skier triggered cracks on an E to NE facing wind-loaded test slope.Ski kick caused cornice failure several ft. away from the edge of the cornice above a wind-loaded test slope.Collapsed and rounding buried surface hoar Forecaster
01/28/2018 - 12:00 Incline Lake Peak Mount Rose Area Snowpack Observation Roller balls and small point releases off of rocks on E aspect, 8800', at 12pm.48cm on recent storm snow on top of a series of crusts with some lower density snow in between.Some wind scouring on the snow surface near ridgeline. Forecaster
01/28/2018 - 12:00 Red Lake Peak Carson Pass Area Snowpack Observation Cracking on undercut, N-facing test slope Public


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