Date of Observation: 01/28/2022
Name: Eric Murrow
Zone: Northwest Mountains
Route Description: Standard Axtel skin track up to treeline and descend 2nd Bowl
Observed avalanche activity: Yes
Avalanches: I was able to easily skier trigger small Loose Dry avalanches on sheltered northerly terrain. Most remained in the D1 range, but a few features reached D1.5. The larger Loose avalanches came on longer running slopes where the snow was able to entrain more mass and on the very weak snowpack in 2nd Bowl (previously avalanched at the ground around 12/31).
Observed small natural avalanches on a drifted, east slope of Coon Basin on Mount Emmons, and leeward, northeast terrain on Whetstone’s M-Face. Visibility was too poor to tell if these were shallow Wind Slabs or Loose Dry avalanches.
Weather: Mostly cloudy skies produced around 1 inch of snow by 230pm and skies cleared by sunset.
Snowpack: I traveled on northerly terrain from 9,400 to 11, 600 feet. Sheltered terrain with a deeper snowpack, around 3 feet or more, has up to about 8 inches of weak surface snow for Loose Dry avalanches. In 2nd Bowl, where the snowpack is shallow and weak from a previous very large avalanche, I was able to trigger sluffs that entrained much of the meager snowpack. Facets on this bed surface are well-developed 1-1.5mm in size. The terrain I moved through helped to confine the moving snow and prevented it from gaining much mass. The skiing in 2nd Bowl was fairly unsupportive and poor in the upper portions of the bowl.
Photos:
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Natural avalanche activity on Whetstone’s M-Face. I was not able to tell if these were loose or soft slab avalanches.
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Natural avalanches in easterly terrain in Coon Basin. Visibility was too poor to identify type. Slope was being drifted by northerly winds.
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A quick look at the upper snowpack on sheltered terrain. Layers of storm snow, facets, and faceting precip particles from the three storms this past week. Loose Dry avalanches in this snowpack can only entrain down about 8 inches.
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A very weak snowpack found in the start zone of 2nd bowl. Facets are well-developed and often unsupportive to skis.
Estimated avalanche date: 01/28/2022
Number of Avalanches: 1
Location
Location: Mount Axtell
Location Specific:
Start Zone Elevation: BTL: Below Tree Line
Aspect: N
Characteristics
Trigger: Skier
Trigger modifier: Controlled
Type: Loose
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: 1/2 Bowl ski cutting. Harmless in size unless on very long slope.
Estimated avalanche date: 01/28/2022
Number of Avalanches: 2
Location
Location: Mount Axtell
Location Specific:
Start Zone Elevation: NTL: Near Tree Line
Aspect: NE
Characteristics
Trigger: Skier
Trigger modifier: Controlled
Type: 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: 2nd Bowl. Weak, shallow snowpack allowed for more entrainment. These picked up enough mass to knock you down and drag you for a bit. Terrain helped to prevent debris from spreading wider.
Estimated avalanche date: 01/28/2022
Number of Avalanches: 1
Location
Location: Mount Emmons
Location Specific:
Start Zone Elevation: ATL: Above Tree Line
Aspect: E
Characteristics
Trigger: Natural
Trigger modifier:
Type: Unknown
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: Vis too poor to pick avalanche type. Could have been soft slab or loose.
Estimated avalanche date: 01/28/2022
Number of Avalanches: 2
Location
Location: Mount Whetstone
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: Increased vertical allowed these two to pick up enough mass to knock you down and carry for a bit. Vis was poor but debris looked to be to little to bury a person.
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:
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