Avalanche: Seagull

Observer Name
chester
Observation Date
Sunday, April 21, 2013
Avalanche Date
Sunday, April 21, 2013
Region
Salt Lake » Big Cottonwood Canyon » Seagull
Location Name or Route
tuscarora, 3 shoot or seagull
Elevation
10,400'
Aspect
East
Slope Angle
40°
Trigger
Snowboarder
Trigger: additional info
Unintentionally Triggered
Avalanche Type
Soft Slab
Avalanche Problem
Wind Drifted Snow
Weak Layer
New Snow/Old Snow Interface
Depth
12"
Width
70'
Vertical
1,000'
Caught
1
Comments
on the way out, saw a lot of east facing ridges higher elevation that had slide due to 4 days of wind loading. ridge east of twin lakes pass, north west ridge of sunset, alta looked like they had success w exploses, saw wind slabs that were cracking high and n e facing on previous days, etc. This was discussed by the group. I thought 3 shoot was probably a bad idea as it it is similar aspect and elevation, commented that we should be very concerned about wind slabs, but I decided ""what does it hurt to take a look"? from the top It "looked" good and I suddenly felt better about it. party of 3, person # 3 did not enter shoot until after it slide. person #1 cut top, no sluff, person #2 joined and stopped. person #1 then cut inside the top under a rock on left side of shoot and waited. person #2 followed same track but stopped 2' below person #1, and it fractured at person #1's feet, or a foot above person #2. person # 2 did not go for a ride, just dropped onto the bed. Mistakes-Ignoring/not acting on obvious red flags of other slides "end of year for brighton" run lead to seeing what we wanted to see. a general attitude of why is this safe vs why is this going to slide.
Coordinates