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
04/01/2020 - 12:00 Red Lake Peak Carson Pass Area Snowpack Observation Soft snow around 11am below on sunny slopes below tree line Impressive blowing snow on Stevens Peak Graupel down about 15 cms under a crust. ECTN 21 Ridges around 9000 feet were very firm with intense wind. Professional Observer
04/01/2020 - 12:00 Carpenter Ridge Independence Lake Area Snowpack Observation Cornice drops onto wind loaded slope with no results. Breakable surface crusts.  Softening occurred on solar aspects. Wet and soft surface snow by 11am on areas with direct sun. Forecaster
03/31/2020 - 11:00 Lincoln Ridge Yuba Pass Area Avalanche Observation Reactive dense wind slab with wide propagation on small test slope. ECTP-13 on buried surface hoar. Buried surface hoar, some up to 10mm + Forecaster
03/31/2020 - 07:30 Hawk Hill, Tahoe Donner Donner Summit Area Snowpack Observation Public
03/30/2020 - 16:45 DLI / Castle Donner Summit Area Avalanche Observation Public
03/30/2020 - 10:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Drifting snow over N ridge of Silver Peak. Wind slab cracking in previously undercut area. Minimal snow still available for transport on S side of E ridge of Silver Peak. Forecaster
03/29/2020 - 11:30 NE Face, Castle Peak Donner Summit Area Avalanche Observation

Ski Cut Castle Peak_032920

Public
03/29/2020 - 11:00 E-ridge of Tamarack Mount Rose Area Snowpack Observation Some cracking in the new snow on top of a firm/MF surface on a S-facing slope Graupel accumulation A quick burst of heavier snowfall; coverage low with rocks/grass poking out in S-facing scoured areas Quick hand pit on a S-facing slope in area with breakable crust. Boot pen through both crusts, ski pen just cracking top crust. Soft, cold snow (F to 4F) above, between, and below the crusts. Public
03/29/2020 - 11:00 Mt. Judah Donner Summit Area Snowpack Observation Small wind slab triggered by ski cut on N end of Wildflower Ridge. Snowpit (N aspect, ~7,500') with well developed SH layer, ECTN and PST 100/100. Rollerballs on E aspect terrain from snow surface heating during minor sun breaks. Pit near 3/27 snowboard triggered persistent slab avalanche (NE aspect, ~7,800') with ECTN results. Large cornices above E face of Mt. Judah. Forecaster
03/29/2020 - 09:30 Grouse Rock Blackwood Canyon or Ward Canyon Area Avalanche Observation Public
03/28/2020 - 13:30 Galena Bowls Mount Rose Area Snowpack Observation Upper snowpack on NE aspect at 9100' Creeks and other hazards at lower elevations Public
03/28/2020 - 11:30 Tallac Summit Snowfield Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Public
03/28/2020 - 11:00 Tamarack Peak Mount Rose Area Snowpack Observation 1 of several ECTN results on the old snow/new snow interface. Breakable crust conditions developing on E/SE aspects at lower elevations. Forecaster
03/28/2020 - 10:30 NE-facing slope Mt Rose Mount Rose Area Snowpack Observation Public
03/27/2020 - 15:30 Johnson Canyon Zone, Horse Range Donner Summit Area Snowpack Observation Public

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