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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
Coytote Butte Mt. Shasta Snowpack Observation 01/23/2017 - 11:00pm Professional Observer
Grey Butte Mt. Shasta Avalanche Observation 01/23/2017 - 10:00am Forecaster
Lower Cascade Gulch Mt. Shasta Snowpack Observation 01/23/2017 (All day) Forecaster
SE ridgeline skiers right of Ski Area, Lassen Volcanic National Park Outside of the Forecast Area Avalanche Observation 01/22/2017 - 6:00pm Public
Eagle's Flight Cliffs Mt. Shasta Avalanche Observation 01/20/2017 - 4:30pm Professional Observer
Old Ski Bowl - Near Treeline Snowpack Observation 01/18/2017 - 9:30pm 1-18-27:  Mt Shasta - near treeline Forecaster
Coyote Backside Mt. Shasta Snowpack Observation 01/17/2017 - 6:05pm Public
Near Boulder Peak Castle Lake Snowpack Observation 01/13/2017 - 10:00pm Surface hoar along south fork road, approx. 5,300 feet, east facing deep rain runnels below 6,000 feet Forecaster
Green Butte/Old Ski Bowl Mt. Shasta Snowpack Observation 01/12/2017 - 10:30pm East aspect of Green Butte, this entire slope slid sometime in the past week. Same easterly aspect of Green Butte that avalanched during this past week Looking up into the Old Ski Bowl from about 9,000 feet Snow surface conditions above treeline on Mt Shasta Forecaster
Left Peak Castle Lake Castle Lake Snowpack Observation 01/11/2017 - 10:30pm Middle Peak Rain Runnels Skin Track Cornice CT7 Failure Bathrooms Professional Observer
Grey Butte NE Aspects Mt. Shasta Snowpack Observation 01/10/2017 - 11:00pm Windloading Human Triggered Avalanche - Location Professional Observer
Coyote Butte Mt. Shasta Snowpack Observation 01/09/2017 - 10:30pm Snowpack layers Professional Observer
Gerald's Bowl Mt. Shasta Snowpack Observation 01/09/2017 - 8:00pm Forecaster
Roadbank, Above Box Canyon Dam Mt. Shasta Avalanche Observation 01/08/2017 - 7:00pm Forecaster
NE Aspect Grey Butte 7800' Mt. Shasta Snowpack Observation 01/04/2017 - 11:00pm Quick column test cut just below new/old snow interface. Professional Observer