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
12/03/2018 - 12:00 Slab Cliffs Mount Rose Area Snowpack Observation Forecaster
04/16/2019 - 11:00 Hidden Peak West Shore Area Avalanche Observation Intentionally skier triggered loose wet avalanche size D1.5.  E aspect, 8500', 35 + degree slope. Small roller ball activity from ski turns involving the recent 3-4'' of new snow. Below 8000' at 10am, 2-3'' of new snow on top of 4F wet snow.  Little to no overnight refreeze at lower elevations below 8000'. Minor cracking in wind loaded terrain.  Wind transported snow was limited to near ridgelines and did not extend downslope very far. E face of Crag Peak.  Small D1 natural loose wet avalanches that occurred by 11am this morning. Forecaster
12/30/2018 - 11:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Signs of wind scouring on an exposed ridge. Forecaster
03/30/2019 - 11:00 Chickadee Ridge Mount Rose Area Snowpack Observation NW aspect near treeline terrain scoured by recent SW winds. NW aspect near treeline terrain scoured by recent SW winds. Surface hoar 10mm+ persisting on N aspects. Breakable crust on E-SE-S-SW-W aspects. Forecaster
03/03/2019 - 12:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation Forecaster
04/05/2019 - 12:00 Mt. Tallac Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Minimal snow surface refreeze at trailhead at 10am (6,520'). Signs of small (D1) loose wet avalanches from past couple of days on E aspect. Signs of accumulating snowfall on crust at 7,800'. Signs of wind slab up to 6 inches deep upon nearing summit ridge in near treeline terrain. Wind slab on summit ridge a the top of Corkscrew avalanche path. 10 inch wind slab of upside down snow (4F+ to F hard) on top of P+ hard crust. Forecaster
12/01/2018 - 10:30 Rubicon Peak West Shore Area Avalanche Observation Mostly filled in crown line from a small skier triggered wind slab avalanche about 2 hours before we got there. NE aspect, 39 degree slope, 9100 ft. The crown goes from where I am taking the photo to where my partner is standing. Skier triggered shooting cracks resulting from a storm slab instability on an undercut slope. Skier triggered shooting cracks on a wind-loaded test slope. Lots of obstacles below 7500 ft. Forecaster
12/22/2018 - 11:00 Tamarack Peak Mount Rose Area Snowpack Observation Wind scouring on a windward slope in near treeline terrain The largest wind slab we saw. It was only 3 to 4 inches deep and only extended 3 to 4 ft. downslope from the ridge. Forecaster
04/12/2019 - 12:30 Donner Summit - Black Wall Snowpack Observation The melt/freeze crust started to become unsupportable on S-SE-E aspects below 7000 ft. by 12:30 The melt/freeze crust was still boot supportable as of noon on S-SE-E aspects. 1 to 2 inches of wet corn snow on top of a 6 inch thick melt/freeze crust on an E aspect at 10 am. About 16 inches of wet snow existed below the crust. Glide cracks on an E aspect. Forecaster
12/05/2018 - 13:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Skier triggered loose dry avalanche (D1) on N aspect, near treeline, ~7,800'. New snow failing on the buried surface hoar with a shovel tilt test. Forecaster
12/27/2018 - 12:00 Lincoln Ridge Yuba Pass Area Snowpack Observation NE winds scouring cornices and drifting snow over the ridgetop. First signs of recent wind transport in textured surface upon reaching near treeline terrain. At 7,200', 8 inches of recent storm snow on top of 12/22 rain crust. No 12/24 rain crust present at and above 7,200'. ECTP-30 on 12/4 buried surface hoar layer. Forecaster
02/12/2019 - 10:00 Munchkins Area Sawtooth Ridge to Tahoe City Snowpack Observation Intense snow transport over the 8000'+ peaks to the North. ECTX on SE aspect, 6750', 27 degree slope, with no defined sun crust below recent storm snow. Forecaster
01/20/2019 - 11:30 Carson Pass Carson Pass Area Snowpack Observation Scoured surfaces on the windward aspects. A mix of new snow on crusts and exposed crusts on leeward slopes. Forecaster
12/10/2018 - 11:00 Relay Peak Mount Rose Area Snowpack Observation Small snow squall moving into the area. Small cornice piece dropped onto a test slope with no results. Forecaster
01/03/2019 - 11:00 Incline Lake Peak and Slab Cliffs Mount Rose Area Snowpack Observation Forecaster


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