Date of Observation: 02/03/2022
Name: Zach Guy and Jack Caprio
Zone: Northwest Mountains
Route Description: Toured from Mt. Emmons to Peeler Basin to Oh-Be-Joyful Basin on various aspects to about 12,000 ft.
Observed avalanche activity: Yes
Avalanches: Skier triggered numerous small, shallow sluffs on very steep slopes facing east to north aspects at all elevations. Sluffs were about 3″ deep above treeline and entrained about 6″ of faceted snow below treeline.
Spotted one slightly larger wind slab on Mt. Afley that ran sometime in the past few days, D1 in size.
Weather: Cold temps, mostly clear skies. Light north winds were occasionally producing light drifting at ridgetop.
Snowpack: Felt comfortable moving through lots of complex avalanche terrain with minimal signs of instability apart from shallow sluffs. We encountered a few thin but hard drifts that produced localized cracking and/or collapses. I believe these formed a few days ago during the strong W/SW wind event. About 2″ of fresh snow was evenly distributed across all aspects; we encountered a few minor drifts involving just the new snow onto southerly aspects that did not produce signs of instability.
Photos:
-
-
Burt sniffed out several thin but hard drifts like this; a few feet wide that produced cracking or collapses
-
-
A few skier triggered small sluffs on a very steep, NE facing slope NTL
-
-
A small wind slab that ran naturally some time in the past few days on Mt. Afley
-
-
A couple of small skier triggered sluffs on an east aspect ATL
-
-
Sluffing on a very steep slope below treeline, NE aspect.
Estimated avalanche date: 02/03/2022
Number of Avalanches: 2
Location
Location: Peeler Basin
Location Specific:
Start Zone Elevation: ATL: Above Tree Line
Aspect: E
Characteristics
Trigger:
Trigger modifier:
Type: Loose
Failure Plane:
Size
Relative Size: R1 very small
Destructive Size: D1- Relatively harmless to people
Avg. crown height (inches): 3
Avg. width (feet):
Avg. vertical run (feet): 300
Involvements
# of people caught:
# of partial burials:
# of full burials:
Additional comments:
Estimated avalanche date: 02/03/2022
Number of Avalanches: 3
Location
Location: Oh-Be-Joyful Basin
Location Specific:
Start Zone Elevation: NTL: Near Tree Line
Aspect: NE
Characteristics
Trigger: Skier
Trigger modifier:
Type: Loose
Failure Plane:
Size
Relative Size: R1 very small
Destructive Size: D1- Relatively harmless to people
Avg. crown height (inches): 3
Avg. width (feet):
Avg. vertical run (feet): 400
Involvements
# of people caught:
# of partial burials:
# of full burials:
Additional comments: Peeler Peak
Estimated avalanche date: 02/03/2022
Number of Avalanches: 2
Location
Location: Oh-Be-Joyful Basin
Location Specific:
Start Zone Elevation: BTL: Below Tree Line
Aspect: NE
Characteristics
Trigger: Skier
Trigger modifier:
Type: Loose
Failure Plane:
Size
Relative Size: R1 very small
Destructive Size: D1- Relatively harmless to people
Avg. crown height (inches): 6
Avg. width (feet):
Avg. vertical run (feet): 250
Involvements
# of people caught:
# of partial burials:
# of full burials:
Additional comments: Peeler Peak
Estimated avalanche date: 02/01/2022
Number of Avalanches: 1
Location
Location: Oh-Be-Joyful Basin
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: Little Silver Basin. Failure date estimated, looks like it might have run before the most recent snowfall during the windy period around 1/31 or 2/1
Estimated avalanche date:
Number of Avalanches:
Location
Location:
Location Specific:
Start Zone Elevation:
Aspect:
Characteristics
Trigger:
Trigger modifier:
Type:
Failure Plane:
Size
Relative Size:
Destructive Size:
Avg. crown height (inches):
Avg. width (feet):
Avg. vertical run (feet):
Involvements
# of people caught:
# of partial burials:
# of full burials:
Additional comments:
5306