Observation Date
3/4/2014
Observer Name
Bruce Tremper
Region
Salt Lake » Little Cottonwood Canyon » Grizzly Gulch » Patsy Marly
Location Name or Route
Project with video crew in Grizzly - Patsy Marly
Weather
Sky
Overcast
Precipitation
Moderate Snowfall
Wind Direction
Northwest
Wind Speed
Moderate
Weather Comments
Snow during most of the day, breaking up by mid afternoon. Just 2-3 inches fell with rain below about 7,000'
Snow Characteristics
New Snow Depth
3"
New Snow Density
Medium
Snow Surface Conditions
Powder
Snow Characteristics Comments

Just 3 inches of new snow to freshen things up but the rain-snow line started around 7,000'

Red Flags
Red Flags Comments
Not much in the red flag department
Snow Profile
Aspect
North
Elevation
9,600'
Slope Angle
40°
Comments

I choose no avalanche problems because there are not many right now, at least where I was.

I was out with a video crew doing an avalanche education project. I dug a snow profile for them on the crown face of an avalanche that probably occurred this past weekend on Friday night or Saturday morning. The avalanche was on the north facing side of the Patsy Marly ridge draining in to Grizzly Gulch. The debris barely made it to the groomed cat track. The avalanche was 200' wide and about 1.5 feet deep, 40 degree, north facing slope, 9,600'.

The snow profile showed that the storm snow instability from the weekend was completely settled out and I could not get any failures on that layer, nor any other significant failures in 5 column compression tests in the top 1.5 meters of the snowpack. So at least right there, things looked pretty solid. We skied an adjacent slope of about 33 degrees.

After the project, I zipped up to Patsy Marly summit (10,700') for some exercise and there was some minor wind loading of new snow in lee terrain but it was very shallow and soft and really posed no problem.

I know a place like Grizzly Gulch pretty tame compared to some of the more radical terrain in the Wasatch and it often has more stable snow. Today was no exception. I'm still suspicious of the steep, rocky, shallow snowpack terrain, where there are more faceted snow layers closer to the surface. But most slopes seem stable especially compared to the very weak and unstable snow we've had for most of the winter up to now. I love this time of year.

The sun is supposed to come out tomorrow, so watch for wet avalanches as things heat up.

Today's Observed Danger Rating
Low
Tomorrows Estimated Danger Rating
Moderate
Coordinates