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
03/24/2019 - 10:30 Judah Peak Donner Summit Area Avalanche Observation We saw 5 more small slides like this above the snow sheds that seemed to be from yesterday. Wind effect along the Judah Ridge Two slides could be seen looking back at Judah Peak from Donner Peak in at noon. Public
12/03/2018 - 12:00 Jakes Peak West Shore Area Snowpack Observation Public
01/15/2019 - 08:00 Jake's Peak West Shore Area Snowpack Observation A view of the pit with distinct layers. Snow fall rates picked up to S1 or S2 as we continued to ascend. Minor surface instabilities/slough (NSF and new snow) were easy to trigger in steeper terrain. Public
02/22/2019 - 09:30 Schallenberger Ridge Donner Summit Area Snowpack Observation The pit from our shovel tap tests. The pink line is the new old snow interface that begrudging, but cleanly broke New rime ice on icicles. Did not affect our travel plans, but was fun to see. Public
03/09/2019 - 11:00 Hidden Peak West Shore Area Avalanche Observation Jake's Peak wind slab on N aspect Wind slab remote triggered or natural at ridgeline Public
02/03/2019 - 13:45 Bear Valley Via Meadow Lake Rd Independence Lake Area Snowpack Observation Public
02/24/2019 - 01:45 Galena Creek Mount Rose Area Snowpack Observation Public
02/07/2019 - 08:00 Shirley Canyon Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Surface hoar developing on north facing aspect at ~7500' Public
03/30/2019 - 08:30 Donner Peak Donner Summit Area Snowpack Observation I kicked a few small wind loaded test slopes and this was the extent to cracking seen. I first had to undercut this slope to get it to crack. Public
01/22/2019 - 09:15 The 11s - Trimmer Peak Snowpack Observation Graupel on the surface of my skis Graupel can be seen piled up by the wind on an exposed ridge E-NE wind transporting snow over the false summit of Trimmer Peak Minor settlement found around some trees Cracking of windslabs was isolated and small Public
03/17/2019 - 14:45 Donner Lake Run above Conifer Drive Donner Summit Area Avalanche Observation Public
04/08/2019 - 02:45 South Fork, Creek Drainage Mount Rose Area Avalanche Observation Public
11/23/2018 - 10:30 Grouse Rock Blackwood Canyon or Ward Canyon Area Snowpack Observation Public
12/17/2018 - 13:00 Castle Peak Donner Summit Area Snowpack Observation Small windslab under 4cm of soft snow cracking The wind affected layer that broke in the previous photo. Soft snow removed on left side to show the slab. ECTN 12 @ the new windslab layer. Public
03/04/2019 - 11:00 Red lk pk Carson Pass Area Avalanche Observation Public


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