Observation: Silver Fork

Observation Date
1/17/2014
Observer Name
Cody Hughes/Bo Torrey
Region
Salt Lake » Big Cottonwood Canyon » Silver Fork
Location Name or Route
Silver Fork
Weather
Sky
Clear
Wind Speed
Calm
Weather Comments
Very light wind on the ridge line but nothing significant to note. Another warm sunny day in the mountains.
Snow Characteristics
New Snow Depth
10"
Snow Surface Conditions
Powder
Dense Loose
Faceted Loose
Wind Crust
Melt-Freeze Crust
Rain-Rime Crust
Damp
Snow Characteristics Comments
Mixed bag of snow surface conditions today. Found the best turning conditions out of the wind exposed areas lower on the slope. Southern facing slopes seemed to be skiing well as the crust melted off around 11ish. Did note many wind/temperature crusts in the more exposed upper elevation regions on all aspects. Bo and I dug two separate pits no more than 20 feet apart on the same aspect NE. We were quite a ways off the ridge tucked over a knoll that was open. Bo had 165 cm of snow with his CT producing no results. I was just up the slope and was also on a NE aspect that was only holding 95-100 cm of snow. I was first able to get the column to collapse, it then popped with a clean shear right at me on my 11 tap from my elbow CT11 Q1. I was also able to get my column on two separate ECT tests to fully propagate with a clean shear; again popping right out at me ECT22 Q1 and ECT29 Q1. I will note that it did take the hits from my shoulder to get the column to propagate but once I did collapse the weak layer the energy was HIGH. To me this shows that the depth hoar is still lingering...
Red Flags
Red Flags
Rapid Warming
Poor Snowpack Structure
Red Flags Comments
Did see rollerballs as the day heated up on the slopes facing the southern half of the compass. Was able to find a more shallow area in Silver fork where we were able to collapse and propagate the depth hoar.
Avalanche Problem #1
Problem
Persistent Weak Layer
Trend
Decreasing Danger
Problem #1 Comments
It's still there folks. The "monsters in the basement" continue to haunt us. Our depth hoar problem is slowly healing itself over time as the snowpack thickens. Having said that I believe you can still find shallow/thin areas in the snowpack where this depth hoar layer can still be triggered. This type of avalanche can fracture above you catching you off guard and if the consequences are high enough creating an unmanageable situation. I would still be weary of those big exposed slopes facing the north half of the compass.
Avalanche Problem #2
Problem
Wet Snow
Trend
Same
Problem #2 Comments
The south facing slopes heated up quickly today. There was not much wind circling around to counter act the suns radiation.
Video
Today's Observed Danger Rating
Considerable
Tomorrows Estimated Danger Rating
Considerable
Coordinates