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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.

Location Region Observation Type Date and time of observation or avalanche occurrence Videos Avalanche photos Videos Snowpack photos Snowpit or crown profile photo or graph Observation made by
Natural Avalanches in Sun Bowl Mt. Shasta Avalanche Observation 12/03/2017 - 2:00pm Forecaster
Small avalanche in Old Ski Bowl today Mt. Shasta Avalanche Observation 12/03/2017 - 10:00am Forecaster
Old Ski Bowl area Mt. Shasta Snowpack Observation 11/30/2017 - 10:00pm Looking over at Gray Butte A look across at the Eddy Mountains Green Butte, east aspect, 8,200 feet Forecaster
Avalanche Gulch Mt. Shasta Avalanche Observation 11/18/2017 - 9:30am Forecaster
Old Ski Bowl Mt. Shasta Snowpack Observation 11/11/2017 - 10:00pm Forecaster
Whitney Mt. Shasta Climbing Route & Trailhead Conditions 10/22/2017 - 12:00pm Climbing Ranger
Lassen Outside of the Forecast Area Snowpack Observation 04/16/2017 - 5:20pm Public
Middle Peak, Castle Lake Avalanche Observation 04/13/2017 - 10:30pm Professional Observer
Avalanche Gulch Mt. Shasta Avalanche Observation 04/07/2017 - 11:06pm Public
Old Ski Bowl Mt. Shasta Snowpack Observation 04/07/2017 - 7:15pm Forecaster
Green Butte Ridge Mt. Shasta Snowpack Observation 04/06/2017 - 8:00pm Professional Observer
Avalanche Gulch Mt. Shasta Avalanche Observation 04/02/2017 - 5:05pm Public
Avalanche in Old Ski Bowl Mt. Shasta Avalanche Observation 03/25/2017 - 7:30pm Forecaster
Ski bowl Mt. Shasta Snowpack Observation 03/25/2017 - 1:30am Public
Backside "Coyote Butte" @ Mt Shasta Ski Park just right of primary start zone Mt. Shasta Snowpack Observation 03/24/2017 - 8:30pm Public