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
03/26/2019 - 12:00 Trimmer Luther Pass Area (including Job and Freel) Snowpack Observation Professional Observer
12/03/2018 - 12:00 Red Lake Peak Carson Pass Area Snowpack Observation Surface Hoar growing on flat terrain near base of Red Lake Peak. Previous skier triggered slide in sun in middle of photo. Natural slide on left of photo and skier triggered slide on far right. Cracking in front of ski tip. Professional Observer
03/29/2019 - 11:00 Trimmer Peak Carson Pass Area Snowpack Observation Small cracks on the edge of a wind blown feature. Small windslab on a steeper convexity test slope. Same test slope. My partner noticed this as terrain irregularity with signs of wind effected snow. Professional Observer
04/04/2019 - 12:15 Genoa Peak East Shore Area Snowpack Observation Rime covered tree in a windy location near Genoa Peak. Rime covered sastrugi growing into the west winds. Professional Observer
01/10/2019 - 12:00 Blue Lakes Carson Pass Area Snowpack Observation Professional Observer
03/12/2019 - 12:00 Horse Meadow Luther Pass Area (including Job and Freel) Snowpack Observation Professional Observer
02/07/2019 - 12:00 The Nipple Carson Pass Area Avalanche Observation Professional Observer
03/17/2019 - 11:00 Stevens Peak Carson Pass Area Snowpack Observation Above 8600 feet on open east facing terrain the snow was very close to corn. A few shaded gullies held more wintry snow. Professional Observer
01/08/2019 - 11:00 Red Lake Peak Carson Pass Area Snowpack Observation Settlement cones. Very strong snow for the top 40cms in this area. ECTP 24 down 45cms from surface Professional Observer
12/17/2018 - 12:00 Round valley Donner Summit Area Snowpack Observation New small cornice broke easily under a ski kick. Wind blown snow texture on NW side of ridge to Castle. On a few steeper switchbacks cracks propagated. Professional Observer
03/10/2019 - 11:45 Castle Ridge Donner Summit Area Snowpack Observation Open areas below Castle Pass were holding several inches fresh snow on top of older soft snow. On the ridge heading towards Castle, the skin track in the middle of this photo was largely obscured by blowing snow after approximately 30 minutes. On a north facing test slope, a shallow but 40 foot wide wind slab occurred in response to a ski kick. Heavily rimed (and beautiful trees) on the NW slopes of Castle. Professional Observer
01/16/2019 - 11:00 Powderhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation This crack shot out approximately 40 feet in front of my ski. Profile of where crack propagated. Professional Observer
12/11/2018 - 12:00 Thunder Mountain Carson Pass Area Snowpack Observation Professional Observer
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
02/18/2019 - 12:00 Indian Valley Ebbetts Pass Area Snowpack Observation Professional Observer


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