11th Annual Utah Snow & Avalanche Workshop Open and Motorized Sessions Oct. 27th.
Ad
Observer Name: 
Eric Flygare
Observation Date: 
Friday, February 3, 2012
Avalanche Date: 
Friday, February 3, 2012
Location Name or Route: 
Franklin Basin
Elevation: 
7900
Aspect: 
North
Slope Angle: 
40
Trigger: 
Snowboarder
Trigger: additional info: 
Unintentionally Triggered
Avalanche Type: 
Hard Slab
Depth: 
18"
Width: 
50
Vertical: 
100
Comments: 

On the last run of the day I decided to ride a 40-45 north facing slope.  The slope received a fair amount of wind loading throughout the blustery day.  The slope was about 75 to 100 feet tall.  As I dropped in I figured it was a good possibility that it would slide, but the consequences of a slide were very low.  Sure enough, about 10 feet down the slope, a wind slab 1-2 feet thick and about 50 feet wide let loose.  I pointed it straight down, left of the tree in the picture, and over the small cliff at the bottom and came out ahead of the slide.  The debris appeared to be 3-4 feet deep.

We rode many other mellow slopes throughout the day with no signs of instability.  Pit tests looked pretty good all around.  I got an ECTP 26 on a 22 degree west facing slope earlier in the day.  The failure occurred about 2 inches below the faceted/2-week-old snow interface.   Another pit in a similar area didn’t produce any CT failures.  It was interesting to note that the facets near the ground are becoming slightly more rounded and look like they are beginning to bond.

Coordinates: 
Ad

Support the Avalanche Center through your purchases

Discount lift tickets
All proceeds from ticket sales benefit the UAC when you purchase your next lift tickets.
Lift tickets available in November
Need new gear?
Make your next purchase from our Affiliate Partners and the UAC will receive a portion of the sales.
Shop
Sign up for our newsletters, emails and daily forecasts to stay up to date.
Subscribe