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 http://www.snowpilot.org/. 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
02/19/2016 - 14:30 Grass Lake Luther Pass Area (including Job and Freel) Snowpack Observation Educator
Lake Tahoe Community College - Wilderness Education
03/29/2017 - 11:30 South Side Castle Peak Donner Summit Area Snowpack Observation Educator
Sierra Nevada College
03/15/2017 - 11:47 Donner Peak Donner Summit Area Avalanche Observation
Loose wet avalanche size D2 triggered by natural cornice collapse.
Loose wet avalanche size D2 triggered by natural cornice collapse.
Forecaster
12/24/2016 - 11:10 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation
This slide was triggered from this spot on the ridge above the slide. The lower angle slope below me cracked but did not slide.
Overview of the slide, taken from between the trigger point and the crown.
Looking a the skiers left side of the crown from the middle of the avalanche. Note the firm bed surface (the 12/15 rain crust) and the thin darker line in the crown just above the rain crust at the bottom of the new snow - the near crust facets.
Skier's right side of the crown and flank as the slope become lower angle to the skier's right.
Looking down the path at the debris and terrain traps below.
Small skier triggered loose dry sluff and a shooting crack on a N-NE facing slope around 8000 ft.
Forecaster
12/09/2017 - 12:00 Relay Peak Mount Rose Area Snowpack Observation E face of Relay Peak, 10,200'.  Wind scoured by the recent NE/E winds.NW/W bowls of Relay Peak.  Wind scoured in areas and wind loaded in areas with hard slabs.2' of cohesive hard slab P to K hard.  F hard facets below.  CTM-12 SC on facet layer.ECTPV.  292 degree W/NW slope, 19 degree slope angle. Forecaster
11/19/2017 - 12:00 Relay Peak Mount Rose Area Snowpack Observation Forecaster
12/02/2015 - 13:00 Relay Peak Mount Rose Area Snowpack Observation Forecaster
02/21/2018 - 12:00 Castle Peak/Andesite Peak Donner Summit Area Snowpack Observation Built out cornices just below Castle Peak.  W-NW ridge is scoured to firm crusts with up to 8'' of wind blown snow on leeward side. Exposed SW-W aspects at 8200' on Andesite Peak are well scoured with little to no snow available for transport. Forecaster
01/13/2018 - 12:00 Elephants Back Carson Pass Area Snowpack Observation Forecaster
02/19/2016 - 13:51 Andesite Ridge Donner Summit Area Avalanche Observation
Forecaster
02/23/2017 - 12:00 Tamarack Peak Mount Rose Area Snowpack Observation Small natural cornice failure on Prolitariate Bowl.  9750', E aspect.Cornice kicks on test slopes produced no signs of slab propagation.Wind slabs were forming from NW winds on E-SE-S-SW aspects with small localized cracking.NW winds scouring ridgelines and loading E aspects in this area. Forecaster
12/07/2016 - 13:00 Relay Peak Mount Rose Area Snowpack Observation Forecaster
03/25/2018 - 10:30 Andesite Peak Donner Summit Area Avalanche Observation Natural wind slab below the summit of Andesite, E aspect, ~8,200'. Appeared to have occurred late on March 24. 6 inches of storm snow available for wind transport in above treeline areas. Dark line is our skin track. Minor cracking on wind loaded test slope above treeline. Forecaster
04/11/2017 - 11:00 Incline Lake Peak Mount Rose Area Snowpack Observation ECTN results were obtained from testpit in climbers left side flank.ECTN results in testpit.2 x ECTN and 1 x ECTP results were obtained from testpit in climbers left side flank. Forecaster
03/17/2016 - 13:00 Stevens Peak Carson Pass Area Snowpack Observation Forecaster

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