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 Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
03/17/2019 - 14:45 Donner Lake Run above Conifer Drive Donner Summit Area Avalanche Observation Public
11/29/2018 - 12:30 Relay Peak Mount Rose Area Avalanche Observation Small windslab along ridge line Public
12/03/2018 - 12:00 Slab Cliffs Mount Rose Area Snowpack Observation Forecaster
12/08/2018 - 13:00 Elephant's Hump Carson Pass Area Snowpack Observation Professional Observer
12/12/2018 - 12:30 South Ridge Houghton Mount Rose Area Snowpack Observation Public
12/16/2018 - 14:30 Powderhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation Increasing clouds and some light precipitation over the Sierra Crest in the late afternoon. ECTX when testing the lower layers of the snowpack. Forecaster
12/19/2018 - 13:45 West ridge of peak 9,422’ Carson Pass Area Snowpack Observation Public
12/25/2018 - 12:00 Thunder Mtn Carson Pass Area Snowpack Observation Professional Observer
12/30/2018 - 11:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Signs of wind scouring on an exposed ridge. Forecaster
01/06/2019 - 12:30 Tamarack Peak Mount Rose Area Snowpack Observation One of many easily triggered windslabs today Shooting cracks were common today Educator
Tahoe Mountain School
01/08/2019 - 15:00 Shirley Canyon Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation Educator
Alpenglow Expeditions
01/12/2019 - 11:00 Needle Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Strong winds and wind transport on Needle Peak this morning Some windslab cracking near the ridgeline A fairly large old crown at Needle Lake. Debris have since been buried under new/blowing snow Some roller balls at 2:30 on south aspects 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
01/18/2019 - 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
01/22/2019 - 11:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Digging 2m deep test pit. Surface hoar still well preserved buried 1m down, but unreactive. NE winds scoured ridgetop and upper portion of N aspect start zones down to rain crust. Settlement of most recent storm snow. Forecaster


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