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
03/04/2019 - 12:00 Becker Ridge Echo Summit Area Avalanche Observation Loose wet avalanches occurring yesterday during rapid warming conditions near Hwy 50 below Echo Pass. Loose wet activity from yesterday on Ralston Peak Loose wet activity from yesterday off of Becker Ridge. Forecaster
03/04/2019 - 15:00 Tamarack Peak Mount Rose Area Snowpack Observation The extent to windslab cracking seen. This slab was first undercut. Small cornices broke fairly easily. Public
03/05/2019 - 11:15 Carson Pass Carson Pass Area Snowpack Observation Freshly wind blown snow mostly covering yesterday's skin track. Sastrugi Wind scoured area just west of Frog Lake. There were areas scoured down to old rain crust. Around 11:20 there were periods of light rain. Slab conditions existed below tree line. Professional Observer
03/05/2019 - 11:45 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Forecaster
03/06/2019 - 11:00 Tamarack Peak Mount Rose Area Avalanche Observation Large shooting cracks with wind slab release in near treeline wind loaded terrain. Small wind slab avalanche intentionally triggered on a test slope.  Crown 12-16'' deep. Sensitive wind slab avalanche intentionally triggered on small test slope. Natural wind slab avalanche mostly covered up.  East Ridge Tamarack, 9600', N aspect Natural storm slab avalanches on a N aspect at 8700 ft. with ~1 ft crown. , Forecaster
03/06/2019 - 13:00 Andesite Peak Donner Summit Area Avalanche Observation Right flank of slide Left flank of slide Public
03/06/2019 - 14:30 North ridge incline lake peak Mount Rose Area Avalanche Observation Small natural storm slab on convex unsupported slope ss-n-r2-d1.5 Larger storm slab (appeared to be natural) slide propagated around terrain feature and into adjacent bowl.  Public
03/06/2019 - 15:00 Below Echo Peak Echo Summit Area Snowpack Observation Public
03/07/2019 - 10:30 Powderhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation Impressively deep tree well. Cracking near a small cornice. Cracking on a steeper test slope under cut by a skin track. Professional Observer
03/07/2019 - 12:00 Indian Valley Ebbetts Pass Area Snowpack Observation Professional Observer
03/07/2019 - 12:00 Mt. Judah Donner Summit Area Snowpack Observation ECTP on a lower density layer of storm snow on an open near treeline aspect at 8060 ft. Wind affected slope on the windward side of a ridge. Settlement cracks around a tree. A very deep tree well. Small cornice dropped on a small wind-loaded test slope with no additional results. Forecaster
03/08/2019 - 11:15 Lincoln Ridge Yuba Pass Area Snowpack Observation One of many large cornices in this area. Sustained moderate to intense blowing snow on the ridgetop. Forecaster
03/08/2019 - 12:30 Andesite Ridge Donner Summit Area Snowpack Observation Public
03/08/2019 - 13:00 Incline Lake Peak Mount Rose Area Snowpack Observation A ski cut on this ridgeline test slope triggered a ~8-12 inch deep wind slab Large cornices existed along the summit ridgeline Ski kicks did not trigger any cracking on this test slope until it was undercut. Then ski kicks could trigger shooting cracks. Settlement cracks existed around trees in more sheltered terrain. A Test pit from a N aspect below treeline slope sheltered from the wind. Tests did not show signs of instability. Forecaster
03/08/2019 - 14:00 Border Ruffian/Tamarack Zone Carson Pass Area Snowpack Observation Public


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