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
02/13/2019 - 11:00 Andesite Peak Donner Summit Area Avalanche Observation Long shooting crack on storm snow instability. Natural avalanche that failed early this morning on a storm snow weakness at the beginning of the storm snow Forecaster
03/11/2019 - 12:00 Tamarack Peak Mount Rose Area Snowpack Observation Thick low to mid level clouds during the morning hours on Tamarack Peak. East Ridge of Tamarack Peak with cornices and some recent NE wind scouring. Cornice collapses partially covered by additional new snow. Forecaster
11/24/2018 - 12:00 Castle Peak Donner Summit Area Snowpack Observation Pooling water along the Castle Valley Road from 7200-7800' Rain runnels with wet snow to the ground below 7800' Rain crust up to peak at 9100'. Forecaster
03/16/2019 - 11:00 Mt. Judah Donner Summit Area Snowpack Observation Thin surface melt-freeze layer over dry snow (not yet a corn setup). Thin surface melt-freeze layer over dry snow (not yet a corn setup). Wet snow over dry snow without a melt-freeze crust in between. Small surface hoar on N aspect terrain near Mt. Judah summit. Breakable crust on N aspect around 7,100'. Forecaster
12/18/2018 - 13:00 Mt. Judah Donner Summit Area Avalanche Observation These wind slab avalanches along Mt. Judah were thought to have occurred mid morning. Shooting cracks in wind loaded terrain on small test slopes at lower elevation. Skier triggered reactive windslabs along Wildflower Ridge. Multiple natural wind slab avalanches along the East Face of Mt. Judah.  All D1 in size. Wind slab avalanches along Mt. Judah were up to 1-2' deep, but did not extend very far downslope. Forecaster
02/05/2019 - 11:30 Tamarack Peak Mount Rose Area Snowpack Observation Skier triggered shooting cracks propgated about 20 ft from the front and back of my skis on a wind-loaded test slope. Partly cloudy to mostly sunny skies by midday over the Mt. Rose area. Forecaster
02/19/2019 - 13:00 Deep Creek Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Very small loose dry on NE aspect, 46 degree slope angle, below treeline terrain. Pockets of upright surface hoar on shaded northerly aspects. Skinning through this S aspect wind slab produced no cracking. Minor wind scouring and blowing snow on the summit of Deep Creek Peak. Skin track refill after about 5 min on top of Deep Creek Peak. Wind scouring down to exposed rain crust near the ridgetop. Forecaster
03/20/2019 - 12:30 Rubicon Peak West Shore Area Snowpack Observation 4 inches of wind affected snow near the summit of Rubicon Small inconsequential wind slab near the summit of Rubicon Upper snowpack at around 8000 ft. on an E aspect on Rubicon Cloudy skies looking N from Rubicon. Forecaster
02/23/2019 - 12:00 Carpenter Ridge Independence Lake Area Snowpack Observation Minimal amount of snow transport along exposed ridges up to noon.  SW winds did increase at our departure. Along ridges above 8000', up to 12'' of light unconsolidated snow exists for wind transport. Forecaster
02/10/2019 - 02:00 Andesite Peak Donner Summit Area Avalanche Observation Forecaster
03/09/2019 - 11:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Wind slab on NE aspect that we carefully avoided while ascending to the east ridge. Blowing snow on east ridge, transporting left to right onto N aspect terrain. ECTP-22 on wind slab down 1.5 ft, 1F hard over 4F hard. ECTP-25 on wind slab down 1.5 ft, 1F hard over 4F hard. Old avalanche debris below NE-E aspect wind loaded terrain, likely from natural wind slab on March 6. Forecaster
01/27/2019 - 11:30 Mt. Judah Snowpack Observation Small skier-triggered rollerballs and pinwheels on a S facing slope @ 11:45 am. Large crevasse formed as the cornice pulls away from the ridge during the warm weather. Variable firm surfaces on exposed N-NE aspects due to wind scouring. Forecaster
03/05/2019 - 11:45 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Forecaster
02/20/2019 - 12:30 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Newly fallen graupel. Wind features pointing both directions with cornices in the background. Our skin track refilled within an hour from a combination of new snow and light wind loading. New snow had barely covered the previously scoured surfaces leaving variable dust on crust conditions in some exposed areas. Settlement cracks indicating consolidation in the recent snow. Forecaster
03/22/2019 - 11:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Cloud cover over the forecast area limiting snow surface melt. About 1 cm on recent storm snow over crust on N-NE aspects. Forecaster

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