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
12/07/2017 - 12:30 Incline Lake Pk Mount Rose Area Snowpack Observation Forecaster
05/05/2017 - 10:00 Castle Peak Donner Summit Area Snowpack Observation Ankle deep wet snow on a S aspect just before 9 am. Boot top deep wet snow on a N aspect near 8800 ft. at 10:00 amMid shin deep wet snow at 11 am. Forecaster
12/10/2017 - 12:30 Becker Ridge Echo Summit Area Snowpack Observation Snow coverage at 7400 ft. Snow coverage at 7800 ft. on N aspects.Looking up the ridge toward Becker Peak @ 7900 ft. Forecaster
11/15/2016 - 12:20 Rubicon Peak West Shore Area Snowpack Observation Forecaster
04/19/2018 - 11:00 Mt. Judah Donner Summit Area Snowpack Observation Mix of sun and snow showers over the Sierra Crest. Breakable melt-freeze crust on N aspects. Supportable melt-freeze crust over recent storm snow on ESE aspect @ 8,200'. Forecaster
01/15/2018 - 14:30 Castle Peak Donner Summit Area Snowpack Observation Forecaster
12/04/2015 - 11:45 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Forecaster
02/08/2018 - 11:30 Mt. Houghton Mount Rose Area Snowpack Observation S/SE face of Mt. Houghton2'' of soft corn snow existed on a supportable base at 11:30am, just below 10,000' on Mt. Houghton on SE aspect.Ski cuts on a steep E aspect, 9200', at 12pm produced only small roller balls.  Snow was punchy and transitional at location.Cold unconsolidated snow existed on shaded northerly aspects above 8600' throughout this area. Forecaster
01/05/2017 - 11:00 Fireplug Mount Rose Area Avalanche Observation
Avalanche overview photo. Zoom in to see details.
Crown line to 6 feet at lower left in overview photo.
Lookin down to debris from crown line in far lower left of overview photo.
02/22/2016 - 12:00 Meiss Meadow Carson Pass Area Snowpack Observation Forecaster
12/30/2015 - 11:00 Andesite Ridge Donner Summit Area Snowpack Observation Forecaster
03/05/2018 - 13:00 Incline Lake Peak Mount Rose Area Snowpack Observation Minimal roller ball activity on E aspect, 9500', by early afternoon. Forecaster
12/18/2017 - 11:00 Castle Peak Donner Summit Area Snowpack Observation Exposed firm rain crust on an open slope.Wind affected surfaces on a NW aspectCoverage on the N side of Castle. Forecaster
02/18/2017 - 13:00 Negro Canyon Donner Summit Area Snowpack Observation Ski cut triggered loose wet sluff on a NE facing test slope.Small wind slab triggered by dropping a cornice onto a N facing test slope.Ski kick triggered loose wet sluffs on an E facing test slope. Forecaster
01/21/2018 - 12:00 Tamarack Peak Mount Rose Area Snowpack Observation Small wind slab triggered by a ski kick on a wind-loaded test slope on the far east ridge of Tamarack Peak.Small wind slab triggered by a ski kick on a wind-loaded test slope on the far east ridge of Tamarack Peak. Forecaster


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