You are here

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 Regionsort descending Observation Type Date and time of observation or avalanche occurrence Avalanche observation video Avalanche photos Snowpit videos (tests, etc) Snowpack photos Snowpit or crown profile photo or graph Observation made by
Lower Sunbowl Snowpack Observation 12/15/2016 - 2:30pm Professional Observer
Middle Peak, Castle Lake Avalanche Observation 04/13/2017 - 3:30pm Professional Observer
Old Ski Bowl - Near Treeline Snowpack Observation 01/18/2017 - 1:30pm 1-18-27:  Mt Shasta - near treeline Forecaster
Left Peak Castle Lake Castle Lake Snowpack Observation 01/11/2017 - 2:30pm Middle Peak Rain Runnels Skin Track Cornice CT7 Failure Bathrooms Professional Observer
Middle Peak Castle Lake Snowpack Observation 02/07/2017 - 12:30pm Forecaster
Castle Lake Castle Lake Snowpack Observation 03/02/2017 - 11:00am Professional Observer
Right Peak Castle Lake Avalanche Observation 03/04/2017 - 11:00am Board of Directors
Castle Lake Castle Lake Snowpack Observation 12/22/2016 - 4:30pm Forecaster
Castle Lake area Castle Lake Avalanche Observation 01/03/2017 - 12:00pm Forecaster
Castle Lake Castle Lake Snowpack Observation 12/27/2016 - 12:00pm Professional Observer
Castle Lake Castle Lake Avalanche Observation 02/07/2017 - 5:00am Forecaster
Middle Peak Castle Lake Snowpack Observation 12/04/2016 - 9:30am Professional Observer
Avalanche on Left Peak Castle Lake Avalanche Observation 03/06/2017 - 10:45am Public
NW Slope Left Peak Castle Lake Snowpack Observation 12/13/2016 - 1:15pm Forecaster
Left peak Castle Lake Snowpack Observation 01/03/2017 - 12:00pm Public