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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 occurrence Videos Avalanche photos Videos Snowpack photos Snowpit or crown profile photo or graph Observation made bysort descending
Right Peak Castle Lake Avalanche Observation 03/04/2017 - 11:00am Board of Directors
Avalanche Gulch Mt. Shasta Snowpack Observation 12/05/2016 - 8:30am Avalanche Gulch, 50/50 Flat area, icy sheen on snow! Windy, firm conditions Lower Avalanche Gulch Board of Directors
Gray Butte Mt. Shasta Snowpack Observation 12/03/2016 - 1:30pm Gray Butte area Board of Directors
Avy Gulch/Casaval Ridge/The Catwalk/Trinity Chutes Mt. Shasta Snowpack Observation 12/29/2016 - 11:30pm The Catwalk Trinity Chutes Riming Thumb Rock & Sargents Climbing Ranger
Eddy Range - Parks Creek summit area Mt Eddy Avalanche Observation 02/21/2017 - 11:00am Forecaster
Shoulder of north aspect of Green Butte Mt. Shasta Snowpack Observation 11/30/2016 - 1:30pm Forecaster
Ash Creek Butte East Bowl East of Mt Shasta Snowpack Observation 12/16/2016 - 2:30pm Wind Transport Ash Creek Butte Ridge Weather Station Shooting Cracks, shallow wind slab pocket on test slope Forecaster
Ash Creek Butte East of Mt Shasta Snowpack Observation 01/10/2018 - 1:30pm Making our way up the ridge to the weather station, just an inch or two of new snow on top of firm, old snow. Windy. Ash Creek Butte loop road, heading back. A brief doughnut hole in the clouds. Forecaster
McBride to Old Ski Bowl via EMH Mt. Shasta Snowpack Observation 01/25/2017 - 1:30pm Forecaster
Sargent's Ridge, South Gate Meadows, Red Butte Mt. Shasta Snowpack Observation 01/28/2018 - 2:00pm Forecaster
Green Butte Ridge Mt. Shasta Snowpack Observation 12/08/2016 - 2:30pm Forecaster
Old Ski Bowl area Mt. Shasta Snowpack Observation 11/30/2017 - 2:00pm Looking over at Gray Butte A look across at the Eddy Mountains Green Butte, east aspect, 8,200 feet Forecaster
Castle Lake Castle Lake Snowpack Observation 12/24/2017 - 2:00pm Forecaster
Green Butte/Old Ski Bowl Mt. Shasta Snowpack Observation 01/12/2017 - 2:30pm 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
Giddy Giddy Mt. Shasta Snowpack Observation 01/22/2018 - 1:00pm Forecaster