BC Zone Observation Report
Sunday, January 27, 2013 at 12:00 AM
Gunnison
Details
Date:
2013/01/27
Observer:
Crested Butte Avalanche Center
Location
BC Zone:
Gunnison
Weather
Weather Description:
Mostly cloudy with short periods of sunshine. Some snowfall but mostly dry during the day.
Snowpack
Snowpack Description:
Pits on an NE aspect near the bottom of our assent route had an HS of 128cm in a wind loaded feature. We observed about 30cm HST in these pits and throughout this area. CT tests were moderate with sudden planner fractures on the Jan 11th interface. We did 1 ECT that broke on this interface but didn't propagate. Shovel tilt tests were easy and planner on the Jan 25th interface below the HST.
Snowpack Obsvervation
Collapsing:
Moderate
Avalanches
Date
Location/Path
#
Elev
Asp
Type
Trig
SizeR
SizeD
2013/01/26
†
Gothic
1
>TL
SW
SS
N
R2
D2.5
Date:
2013/01/26 (Estimated)
Observer:
Crested Butte Avalanche Center
Area Description:
Triggered in recent wind slab, but gouged down to older layers
Landmark:
Gothic
Sliding Surface:
O - Within Old Snow
2013/01/27
†
Anthracite Mesa
1
<TL
E
SS
AS / r
R1
D1
Date:
2013/01/27 (Estimated)
Observer:
Crested Butte Avalanche Center
Area Description:
Coney's- short roller low on the slope
Landmark:
Anthracite Mesa
2013/01/27
†
Anthracite Mesa
3
<TL
E
SS
N
R1
D1.5
Date:
2013/01/27 (Estimated)
Observer:
Crested Butte Avalanche Center
Area Description:
Coney's- short rollers low on the slope
Landmark:
Anthracite Mesa