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Snowpack, Weather, and Avalanche Observations

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. MSAC 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. This program is available as a free download at A video on how to download and use this program is available here. Please send us your observations using the buttons below.

Location Region Observation Type Date and time of observation or avalanche occurrencesort ascending Videos Avalanche photos Videos Snowpack photos Snowpit or crown profile photo or graph Observation made by
Sun Bowl Mt. Shasta Avalanche Observation 02/28/2017 - 8:00am Professional Observer
Sun Bowl avalanche Mt. Shasta Avalanche Observation 02/23/2017 - 4:00pm Forecaster
Gray Butte Mt. Shasta Snowpack Observation 02/23/2017 - 1:00pm A view up the mountain from 9k feet in the Old Ski Bowl. This photo was not from the pit location. A small point release on Red Butte Observation wall from pit Forecaster
Eddy Range - Parks Creek summit area Mt Eddy Avalanche Observation 02/21/2017 - 11:00am Forecaster
Ash Creek Butte East of Mt Shasta Avalanche Observation 02/20/2017 - 11:00am Forecaster
Lassen Sulfur Works Outside of the Forecast Area Snowpack Observation 02/19/2017 - 12:39pm Public
Human triggered storm slab on Gray Butte Mt. Shasta Avalanche Observation 02/18/2017 - 1:20pm Forecaster
Green Butte Ridge Snowpit Mt. Shasta Snowpack Observation 02/18/2017 - 12:55pm Public
Grey Butte Mt. Shasta Snowpack Observation 02/17/2017 - 3:00pm Shooting Cracks Conducting an ECT Test Professional Observer
Green Butte Ridge Mt. Shasta Snowpack Observation 02/16/2017 - 1:15pm Professional Observer
Avalanche Gulch Mt. Shasta Snowpack Observation 02/11/2017 - 1:00pm Forecaster
Middle Peak Castle Lake Snowpack Observation 02/07/2017 - 12:30pm Forecaster
Castle Lake Castle Lake Avalanche Observation 02/07/2017 - 5:00am Forecaster
Grey Butte Mt. Shasta Snowpack Observation 02/06/2017 - 11:30am Forecaster
Eddies - Parks Creek Area Mt Eddy Snowpack Observation 02/05/2017 - 2:15pm Forecaster