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
03/21/2019 - 12:15 Martis Valley West Mount Rose Area Snowpack Observation Constant cracking while skinning Trees holding a dusting of snow on their north faces, beginning at 6800ft Ski penetration 3-4in Layers marked are (from top): new/old snow interface, very weak layer, beginning of melt/freeze snow, end of melt/freeze snow Rounds taken from melt/freeze layer, mostly 1mm diameter, but stuck together in 3-5mm balls Break from crude shovel shear test Public
12/28/2018 - 12:00 Chickadee Ridge Mount Rose Area Snowpack Observation Public
01/16/2019 - 02:00 Incline Lake Peak Mount Rose Area Avalanche Observation Public
02/06/2019 - 14:00 Shirley Canyon Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Public
01/19/2019 - 11:45 Mt. Rose Mount Rose Area Snowpack Observation Public
03/09/2019 - 13:00 Frog lake Carson Pass Area Avalanche Observation Public
12/15/2018 - 14:15 Incline Lake Peak (Ginny Drainage) Mount Rose Area Snowpack Observation Public
01/07/2019 - 11:00 Deep creek drainage Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Ski cut above cat track produced failure on old snow rain crust/facet interface ~3’ down Public
01/23/2019 - 02:30 Tinkers Knob Area Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Public
02/10/2019 - 08:00 Hope Valley & Waterhouse Luther Pass Area (including Job and Freel) Snowpack Observation Public
02/24/2019 - 11:15 Castle Peak Donner Summit Area Avalanche Observation Public
12/19/2018 - 09:00 N of Twin Sentinels Carson Pass Area Snowpack Observation Public
01/31/2019 - 12:15 Jake's Peak West Shore Area Snowpack Observation Public
02/12/2019 - 11:45 Observed from vehicle on Donner Pass Road Donner Summit Area Avalanche Observation Public
03/01/2019 - 11:00 Castle Peak Donner Summit Area Snowpack Observation Settlement cracks Extreme wind features on SE slope Small cornices breaking with much force Massive, layered cornice Public


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