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
01/28/2019 - 10:30 Stevens Peak Carson Pass Area Snowpack Observation Cloudy skies kept the snow surfaces firm and frozen. Mostly supportable but sometimes breakable sun crusts existed on E aspects. Firm uneven surfaces including exposed rain crusts existed on E-NE aspects. Small pinwheels and rollerballs triggered by a ski cut on an ENE facing slope around 8200 ft. Forecaster
01/27/2019 - 14:30 White Rock Lake and surrounding are Independence Lake Area Snowpack Observation Public
01/26/2019 - 14:45 The Grills AKA Tom's Meadow Independence Lake Area Snowpack Observation Public
01/26/2019 - 11:00 Incline Lake Peak Mount Rose Area Snowpack Observation Recent NE wind events have scoured near and above treeline terrain.  Northerly below treeline terrain like this provided wet and sticky surface snow by noon today below 8600'. On southerly aspects, 3-4'' of wet snow existed above a supportable snow surface. Forecaster
01/25/2019 - 11:00 Rubicon Peak West Shore Area Snowpack Observation Thin melt-freeze crust on the snow surface. E aspect at ~9,000'. Limited, minor previous roller ball/loose wet instability on E aspects in Desolation Wilderness. Wind scouring down to exposed rain crust on NE side of Peak 9,269'. Forecaster
01/24/2019 - 13:00 Waterhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation Cold snow with tree drippings on N aspects below treeline. Most prominent below 8,000'. Exposed rain cust visible above treeline in the distance on Steven's Pk, Red Lake Pk, and beyond. Cornices eroded by NE winds along the summit ridge. 1 cm melt freeze crust on S aspect at 9,490' Public
01/23/2019 - 13:30 Castle Peak Donner Summit Area Avalanche Observation Small loose wet avalanches on south side castle peak Guide
Tahoe Mountain School
01/23/2019 - 13:00 Ginny Creek and Slab cliffs Mount Rose Area Snowpack Observation Strong NW winds loading SE slopes Strong winds from multiple directions over the last few days have stripped snow from terrain constrictions on ridge tops ie “saddles” Wet surface snow and above freezing temps at 10 am Public
01/23/2019 - 12:30 Back side of Houghton Mount Rose Area Snowpack Observation Public
01/23/2019 - 11:30 Castle Peak Donner Summit Area Snowpack Observation Wind scoured N aspect terrain. Looking S along Andesite Ridge. Significant wind scouring across the ridgetop. Eroded cornices above SE aspect terrain. Wind scoured N aspect terrain at treeline. Significant settlement of recent storm snow on E side of Andesite. Forecaster
01/23/2019 - 09:15 Porcupine Ridge East Shore Area Snowpack Observation SE aspects with dry/wintery snow above 9000 ft at 9:15 am Porcupine Ridge/ST terrain The observation wall of our profile Natural roller balls on E-SE terrain under rocks Public
01/23/2019 - 02:30 Tinkers Knob Area Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Public
01/22/2019 - 22:00 Flagpole Peak Echo Summit Area Avalanche Observation Public
01/22/2019 - 14:15 Stevens Carson Pass Area Snowpack Observation Public
01/22/2019 - 11:45 Angora Peak Echo Summit Area Snowpack Observation Surface hoar present from between 7000 - 8400 at all aspects in the morning. Settlement cone. Ridge just below Angora summit. Professional Observer