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 button above.
Date and time of observation or avalanche occurrence Location Region Observation Type Photos Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
12/29/2019 - 12:30 Ophir Peak Mount Rose Area Snowpack Observation Blown down 3-5mm surface hoar in open meadows at 8600'. Decomposing Dec 12 RC.  Upper snowpack made up of near surface facets and wind blown snow. Previous wind scouring on northerly near treeline terrain. Increasing clouds with very light snow starting at 12. Forecaster
12/29/2019 - 13:00 Mt. Judah Donner Summit Area Snowpack Observation light blowing snow over this cornice below treeline Educator
Alpenglow Expeditions
12/29/2019 - 13:00 Meadow Lake Independence Lake Area Snowpack Observation Public
12/30/2019 - 01:45 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Public
12/30/2019 - 09:00 Mt. Judah Donner Summit Area Snowpack Observation Public
12/30/2019 - 10:45 Mt. Judah Donner Summit Area Snowpack Observation Dense fog throughout the morning hours with limited visibility.  Small shooting cracks in wind loaded terrain. 4'' reactive wind slab newly formed from the NE winds.  W aspect at 8000' just off ridgeline. Reactive cornices that were built out from yesterdays SW wind event.  8-12'' deep. E bowl of Judah wind scoured by the NE winds. Forecaster
12/30/2019 - 12:00 Tamarack Junction Carson Pass Area Snowpack Observation Professional Observer
12/31/2019 - 10:30 Castle Peak Donner Summit Area Snowpack Observation Wind scouring on numerous aspects at and above treeline. Small 4 inch thick hard wind slab failure on NW aspect test slope. Forecaster
01/01/2020 - 01:30 Incline peak Mount Rose Area Snowpack Observation Public
01/01/2020 - 09:30 Castle Peak Donner Summit Area Snowpack Observation Public
01/01/2020 - 10:30 Galena Peak Mount Rose Area Snowpack Observation Pinwheels near the road cut Rollerballs off ski track Public
01/01/2020 - 12:15 Peak 9008 Luther Pass Area (including Job and Freel) Snowpack Observation The wet surface snow produced easy roller balls. A light rain fell during the late morning up to 9000. Excellent glopping conditions between 8000-9000 feet. Professional Observer
01/01/2020 - 13:00 Waterhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation Public
01/01/2020 - 14:00 Donner Ridge/Sunrise Bowl Donner Summit Area Snowpack Observation Breakable rain crust on Donner Ridge Forecaster
01/02/2020 - 11:00 Relay Peak Mount Rose Area Snowpack Observation Thin rain crust under a half inch of new snow at 8,500'. Breakable rain crust scoured of any new snow on SW aspect at 8,600'. Minor blowing snow with more downslope saltation than slab deposition at 9,700'. Forecaster

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