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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
Gray Butte Mt. Shasta Snowpack Observation 12/03/2016 - 9:30pm Gray Butte area Board of Directors
Right Peak Castle Lake Avalanche Observation 03/04/2017 - 7:00pm Board of Directors
Avalanche Gulch Mt. Shasta Snowpack Observation 12/05/2016 - 4:30pm Avalanche Gulch, 50/50 Flat area, icy sheen on snow! Windy, firm conditions Lower Avalanche Gulch Board of Directors
Avy Gulch/Casaval Ridge/The Catwalk/Trinity Chutes Mt. Shasta Snowpack Observation 12/30/2016 - 7:30am The Catwalk Trinity Chutes Riming Thumb Rock & Sargents Climbing Ranger
Old Ski Bowl Mt. Shasta Snowpack Observation 02/17/2018 - 9:00pm Forecaster
Castle Lake, before the storm... Castle Lake Snowpack Observation 02/28/2018 - 9:00pm Left Peak Right Peak Forecaster
NW Slope Left Peak Castle Lake Snowpack Observation 12/13/2016 - 9:15pm Forecaster
Old Ski Bowl Mt. Shasta Snowpack Observation 01/04/2018 - 9:00pm Bunny Flat trailhead on 1.4.18 at 1300 hrs About 1-2 inches new snow at 8900 feet, Old Ski Bowl on 1/4/18 Bare forest, just above Bunny Flat along road. This is the typical return for skiers skiing Sun Bowl/Powder bowl Everett Memorial Highway, just above Bunny Flat Forecaster
Above Treeline Snowpit & Conditions Mt. Shasta Snowpack Observation 01/26/2018 - 8:30pm Recent avalanche (estimated 1.24.18) Surface conditions, Old Ski Bowl, upper elevations Snowpit, 10,000 ft, Old Ski Bowl Scoured moraine tops, 9,500 feet Forecaster
Sun Bowl avalanche Mt. Shasta Avalanche Observation 02/24/2017 (All day) Forecaster
Casaval Ridge, Avalanche Gulch Mt. Shasta Avalanche Observation 12/17/2016 - 2:00pm Large Natural Avalanche, Casaval Ridge into Avalanche Gulch Forecaster
Old Ski Bowl, Grey Butte Mt. Shasta Snowpack Observation 12/18/2017 - 10:00pm 40-60cm of coverage on the NW aspect of Grey Butte Tree down on the Everett Memorial Highway on the way to the OSB Forecaster
Roadbank, Above Box Canyon Dam Mt. Shasta Avalanche Observation 01/08/2017 - 7:00pm Forecaster
Ash Creek Butte East of Mt Shasta Snowpack Observation 01/29/2017 - 9:00pm Forecaster
Northgate Mt. Shasta Snowpack Observation 02/11/2018 - 11:00pm Forecaster