Date of Observation: 01/02/2023
Name: Zach Guy
Zone: Northwest Mountains
Route Description: Traveled on various aspects off of Elkton Knob, most commonly on west and southwest below treeline.
Observed avalanche activity: Yes
Avalanches: The Elkton area saw a decent D2 cycle over the weekend on many steep slopes, various aspects. Soft slabs were generally 2 to 3 feet thick, failing on mid-December facets. In contrast, the Purple Palace area appeared to be relatively quiet during the cycle, perhaps because of Arctic Blast wind effects on the weak layer there. I stomped around on top of a couple of small, steep slopes and triggered one persistent slab that was 3 feet thick (4F) over fist hard 1mm facets on a west facing slope. There was also evidence of avalanche activity earlier in the storm on Baldy, Purple Ridge, and Schuylkill Ridge. Light was too flat to see much else.
Weather: Light snow showers on and off through the day, with bouts of sunshine too. Light to moderate ridgetop winds with blowing snow off of Mt. Baldy.
Snowpack: Fairly quiet while breaking trail and skinning. We got one collapse and chatted with another group in the same area that got several large collapses and shooting cracks. Slabs are consolidating and ski pen is now ankle deep, making for good turns on the low angle.
Photos:
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Intentionally ski triggered this 3-foot persistent slab.
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The widest avalanche in the Elkton area, may have been D2.5. East facing
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Near Elkton. East facing.
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A south facing slab near Elkton Knob
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A pair of avalanches that might have been remotely triggered. (I think one was reported already)
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South facing avalanches near Paradise Divide
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Persistent slab on a southwest facing slope BTL.
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Persistent slab on a southwest facing slope BTL.
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Persistent slab on a southwest facing slope BTL.
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Elkton Knob persistent slab.
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Looking down at the debris from the Elkton Knob slide
Estimated avalanche date: 12/31/2022
Number of Avalanches: 4
Location
Location: Upper Slate (Purple, Yule Pass, Paradise Divide)
Location Specific:
Start Zone Elevation: NTL: Near Tree Line
Aspect: S
Characteristics
Trigger: Natural
Trigger modifier:
Type: Soft Slab
Failure Plane: Old snow
Size
Relative Size: R2 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: 3X Just below Paradise Divide, 1 X Elkton Knob
Estimated avalanche date: 01/01/2023
Number of Avalanches: 2
Location
Location: Washington Gulch (Elkton, Coneys, Meridian Lake)
Location Specific:
Start Zone Elevation: BTL: Below Tree Line
Aspect: E
Characteristics
Trigger: Natural
Trigger modifier:
Type: Soft Slab
Failure Plane: Old snow
Size
Relative Size: R3 medium
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: One was maybe a 2.5. Widely propagating.
Estimated avalanche date: 01/01/2023
Number of Avalanches: 1
Location
Location: Washington Gulch (Elkton, Coneys, Meridian Lake)
Location Specific:
Start Zone Elevation: NTL: Near Tree Line
Aspect: E
Characteristics
Trigger: Natural
Trigger modifier:
Type: Soft Slab
Failure Plane: Old snow
Size
Relative Size: R3 medium
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: Elkton Knob
Estimated avalanche date: 12/31/2022
Number of Avalanches: 3
Location
Location: Washington Gulch (Elkton, Coneys, Meridian Lake)
Location Specific:
Start Zone Elevation: BTL: Below Tree Line
Aspect: SW
Characteristics
Trigger: Natural
Trigger modifier:
Type: Soft Slab
Failure Plane: Old snow
Size
Relative Size: R2 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: 2 x Elkton Knob, 1 x Top of the World
Estimated avalanche date: 01/02/2023
Number of Avalanches: 1
Location
Location: Washington Gulch (Elkton, Coneys, Meridian Lake)
Location Specific:
Start Zone Elevation: BTL: Below Tree Line
Aspect: W
Characteristics
Trigger: Skier
Trigger modifier: Controlled
Type: Soft Slab
Failure Plane: Old snow
Size
Relative Size: R3 medium
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: Elkton Knob
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