Date of Observation: 03/05/2023
Name: Zach Guy
Zone: Southeast Mountains
Route Description: Southeast shoulder of Gothic to 11,500′, and east side of Snograss BTL.
Observed avalanche activity: Yes
Avalanches: Several natural D1-1.5 wind slab avalanches on Axtell, Whetstone, and the Shield (Redwell Basin). One in Redwell Basin that looked large (D2) from a distance.
Weather: Mostly cloudy skies north of town, partly cloudy south of town. Light winds below treeline except for some periods of strong gusts/blowing snow in valley bottom. Blowing snow continued for most of the day off of the high peaks, and near treeline was somewhere between the two.
Snowpack: Snow surfaces remained soft and relatively unaffected by winds below treeline on Snodgrass. In sheltered terrain, the snow surface was denser and creamier compared to yesterday, with no new slab formation. As we moved into more wind exposed near treeline terrain, surfaces were heavily wind affected, varying from eroded to the last crust or loaded into hard thin slabs. Fresh wind slabs on small terrain features ranged from 3″ to 16″ thick. Some produced cracking, some produced collapses, and others gave no feedback to stomps or ski cuts. I didn’t ski cut the larger looking slabs in a proper windloaded start zone because I don’t like messing with hard slabs.
Photos:
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Several D1.5 – D2 naturals in Redwell Basin
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Cracking in a 10″ hard slab on a small terrain feature.
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Shallow, hard slab cracking in drifted terrain.
Estimated avalanche date: 03/05/2023
Number of Avalanches: 1
Location
Location: Mount Whetstone
Location Specific:
Start Zone Elevation: ATL: Above Tree Line
Aspect: NE
Characteristics
Trigger: Natural
Trigger modifier:
Type: Hard Slab
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: M face, viewed from a distance, size and characteristics are estimated.
Estimated avalanche date: 03/05/2023
Number of Avalanches: 1
Location
Location: Mount Axtell
Location Specific:
Start Zone Elevation: ATL: Above Tree Line
Aspect: NE
Characteristics
Trigger: Natural
Trigger modifier:
Type: Soft Slab
Failure Plane:
Size
Relative Size: R1 very small
Destructive Size: D1- Relatively harmless to people
Avg. crown height (inches):
Avg. width (feet):
Avg. vertical run (feet):
Involvements
# of people caught:
# of partial burials:
# of full burials:
Additional comments: 5th Bowl
Estimated avalanche date: 03/05/2023
Number of Avalanches: 1
Location
Location: Mount Emmons
Location Specific:
Start Zone Elevation: ATL: Above Tree Line
Aspect: NE
Characteristics
Trigger: Natural
Trigger modifier:
Type: Unknown
Failure Plane:
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: Redwell Basin. Probably a wind slab, maybe cornice fall related. Viewed from afar.
Estimated avalanche date: 03/05/2023
Number of Avalanches: 2
Location
Location: Mount Emmons
Location Specific:
Start Zone Elevation: ATL: Above Tree Line
Aspect: NE
Characteristics
Trigger: Natural
Trigger modifier:
Type: Unknown
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: The Shield in Redwell. Somewhere between 1.5 and 2 in size. Viewed from afar.
Estimated avalanche date: 03/04/2023
Number of Avalanches: 1
Location
Location: Gothic Mountain
Location Specific:
Start Zone Elevation: NTL: Near Tree Line
Aspect: E
Characteristics
Trigger: Natural
Trigger modifier:
Type: Soft Slab
Failure Plane:
Size
Relative Size: R1 very small
Destructive Size: D1- Relatively harmless to people
Avg. crown height (inches):
Avg. width (feet):
Avg. vertical run (feet):
Involvements
# of people caught:
# of partial burials:
# of full burials:
Additional comments: Wind slab debris from a slide that likely ran late yesterday, Krakken Arm.
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