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 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
04/05/2020 - 11:30 Munchkins Avalanche Observation A couple small slides. Crows probably less than 6 in Public
04/05/2020 - 12:30 Powderhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation Shooting cracks in a wind loaded test slope just above tree line. Only about 4 inches of new snow below tree line at around noon. Over a foot of snow in a somewhat wind loaded zone just above tree line. Temps were close to freezing and my jacket and pants became wet despite wintry snow. Professional Observer
04/05/2020 - 16:00 Trestle Peak Donner Summit Area Avalanche Observation

LakeView_Snow Pit 4.5.20

04/05/2020 - 16:00 schallenberger ridge Donner Summit Area Snowpack Observation Public
04/06/2020 - 08:00 Steven's Peak Carson Pass Area Avalanche Observation Stevens from afar with a good view of the North Cirque. Upon closer inspection, a large crown is visible crossing the entire bowl. Public
04/06/2020 - 11:15 NW of Incline Pk Mount Rose Area Snowpack Observation Problematic weak layer just below crust at old/new snow interface. Very sunny early morning with abundant cloud cover by midday. Forming suncrust on SE aspect at about 9,000'. Forecaster
04/06/2020 - 11:30 Red Lake Peak Carson Pass Area Snowpack Observation By 10:30am snow had shed from the sunny side of many trees. North facing below tree line steep slope at 7500' showing storm slab cracking. Open east & south facing terrain had a distinct wet layer just below surface. Mostly clear skies. Professional Observer
04/06/2020 - 12:00 Peak 9155 South East of Mt. Ralston Echo Summit Area Avalanche Observation Public
04/06/2020 - 13:00 East of 89 near Luther pass Luther Pass Area (including Job and Freel) Snowpack Observation Public
04/06/2020 - 14:00 Scott Peak & Munchkins West Shore Area Snowpack Observation Pinwheel 7k ft at noon Cornices off NE side of Scott's Peak Public
04/06/2020 - 14:00 Relay peak Mount Rose Area Avalanche Observation Public
04/07/2020 - 11:00 Mt. Judah Donner Summit Area Snowpack Observation Natural loose wet avalanche on north aspect, 7500'. Large built out cornices along ridgelines. Breakable crusts on E aspects with a dusting of snow on top. Forecaster
04/07/2020 - 12:15 Broken Glass Bowl Mount Rose Area Avalanche Observation Small avalanche debris.  Ran ~100' vertical. Deepest portion of the wind slab. ~30cm deep, all within the new snow. Public
04/07/2020 - 14:00 Talking Mountain Echo Summit Area Avalanche Observation Public
04/08/2020 - 09:30 Powderhouse Peak Luther Pass Area (including Job and Freel) Snowpack Observation Blowing snow could be observed on the Little Round Top ridgeline. The crust below the new snow can be observed about 54 cms below surface. ECTP 30 down 54 cms. Professional Observer


Subscribe to Central Sierra Nevada / Lake Tahoe Snowpack, Weather, and Avalanche Observations for California and Nevada from SAC