Date of Observation: 05/17/2022
Name: Ben Pritchett
Zone: Southeast Mountains
Route Description: near Crested Butte
Observed avalanche activity: Yes
Avalanches: May 16 and 17 a cycle of wet avalanches ran that are gouging deeper into the snowpack. These started as loose avalanches, some from cornice collapses, with some gouging out narrow slabs breaking near the ground. Four of them grew large in size.
Weather: several near-record warm days with non-freezing nights. May 14th was the last night with a good freeze above treeline. Notably, at the Butte snotel (10,150′) the last solid valley freeze was May 5th.
Snowpack: Snowpack mostly gone at lower elevations. The snowpack is remarkably dirty and only continuous at upper elevations. The high elevations of the Ruby Range and Paradise Divide area still hold much more snow than other areas.
Photos:
-
-
Several cornice-triggered wet avalanches on Mt. Axtell from May 16
-
-
Numerous fresh wet avalanches in Whetstone Mountain’s Hidden Lake Basin. Many ran May 16th
-
-
A large avalanche ran May 16th in the Barcelona Bowl of Whetstone Mountain
-
-
A fresh wet avalanche in Whetstone Mountain’s Hidden Lake Basin from May 16th
-
-
A large avalanche ran May 16th in the Barcelona Bowl of Whetstone Mountain
-
-
Numerous fresh wet avalanches in Whetstone Mountain’s Hidden Lake Basin. Many ran May 16th
Estimated avalanche date: 05/16/2022
Number of Avalanches: 4
Location
Location: Mount Whetstone
Location Specific:
Start Zone Elevation: ATL: Above Tree Line
Aspect: NE
Characteristics
Trigger: Natural
Trigger modifier:
Type: Wet Loose
Failure Plane: Old snow
Size
Relative Size: R1 very small
Destructive Size: D2 – could bury, injure, or kill a person
Avg. crown height (inches):
Avg. width (feet):
Avg. vertical run (feet):
Involvements
# of people caught:
# of partial burials:
# of full burials:
Additional comments:
Estimated avalanche date: 05/16/2022
Number of Avalanches: 15
Location
Location: Mount Whetstone
Location Specific:
Start Zone Elevation: ATL: Above Tree Line
Aspect:
Characteristics
Trigger: Natural
Trigger modifier:
Type: Wet Loose
Failure Plane:
Size
Relative Size: R1 very small
Destructive Size: D1.5
Avg. crown height (inches):
Avg. width (feet):
Avg. vertical run (feet):
Involvements
# of people caught:
# of partial burials:
# of full burials:
Additional comments:
Estimated avalanche date: 05/16/2022
Number of Avalanches: 5
Location
Location: Mount Axtell
Location Specific:
Start Zone Elevation: ATL: Above Tree Line
Aspect:
Characteristics
Trigger: Natural
Trigger modifier:
Type: Wet Loose
Failure Plane:
Size
Relative Size: R1 very small
Destructive Size: D1.5
Avg. crown height (inches):
Avg. width (feet):
Avg. vertical run (feet):
Involvements
# of people caught:
# of partial burials:
# of full burials:
Additional comments:
5564