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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
Rainbow Mountain, NE of Ash Creek Butte East of Mt Shasta Snowpack Observation 03/18/2018 - 3:00pm Test Profile, 6200 ft, North Facing, 32 Degree Slope Rainbow Mountain Professional Observer
Powder Bowl Mt. Shasta Snowpack Observation 03/17/2018 - 1:30pm Forecaster
Mount Shasta and Gray Butte Mt. Shasta Snowpack Observation 03/16/2018 - 4:30pm Gray Butte Gray Butte Forecaster
Old Ski Bowl, Grey Butte Mt. Shasta Snowpack Observation 03/14/2018 - 2:00pm Old Ski Bowl Old Ski Bowl Grey Butte Professional Observer
Castle Lake area still struggling... Castle Lake Snowpack Observation 03/14/2018 - 1:30pm Castle Weather Station Castle overview Forecaster
Old Ski Bowl, Bunny Flat Mt. Shasta Snowpack Observation 03/13/2018 - 2:00pm Conditions at Bunny Flat @ 1 PM Bunny Flat Trailhead @ 3 PM Whiteout Conditions above Treeline Test Profile Professional Observer
Little Mount Hoffman / Medicine Lake / Little Glass Mountain East of Mt Shasta Snowpack Observation 03/12/2018 - 1:00pm Sparse Coverage Near Pilgrim Creek Snowmobile Park Non-groomed Trail Conditions Roller Balls Small Point Releases Little Glass Mountain from Above The Edge of Little Glass Mountain Medicine Lake Groomed Trails Near Trout Creek Professional Observer
Deadfall Lake / Eddy Mountains Mt Eddy Snowpack Observation 03/09/2018 - 1:15pm Deadfall Lakes snow survey course site Deadfall Lake Skiing into the lake Skiing back down on sticky snow from the lake Lower Deadfall Lakes trailhead area Deadfall Lakes snow survey course site Forecaster
Castle Lake Castle Lake Snowpack Observation 03/07/2018 - 12:30pm Right Peak, Castle Lake Left Peak, Castle Lake Forecaster
Ash Creek Butte East of Mt Shasta Snowpack Observation 03/06/2018 - 1:00am Pilgrim Creek Snowmobile Park View Trail Conditions Small cornices along Ash Creek Butte. From a distance. Ski Penetration up to 30 cm. HST = 100 cm / F-4F-1F hardness, CT21 down 100 cm, ECTP30 down 100 cm, failed on rounded facets Professional Observer
Avalanche Gulch Mt. Shasta Snowpack Observation 03/05/2018 - 3:00pm Forecaster
Red Butte Mt. Shasta Snowpack Observation 03/04/2018 - 2:00pm Pit Location 2 Pit Location 1 Professional Observer
Crater Lake Outside of the Forecast Area Snowpack Observation 03/04/2018 - 10:00am Public
Grey Butte Mt. Shasta Snowpack Observation 03/03/2018 - 3:30pm Forecaster
Bunny Flat / Old Ski Bowl during the storm... Mt. Shasta Snowpack Observation 03/01/2018 - 1:30pm Panther Mdws area Bunny Flat Bunny Flat Test pit Forecaster