Date of Observation: 04/16/2023
Name: Zach Guy
Zone: Northwest Mountains
Route Description: Viewed from Slate River Road and Purple Ridge.
Observed avalanche activity: Yes
Avalanches: Schuylkill Ridge saw a wind slab cycle (averaging D1.5) on crossloaded terrain from Northwest winds yesterday. Several other soft slabs above treeline ran during or after the storm yesterday.
Photos:
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[accordion_item title=”Avalanche Report #1″ parent_id=”my-accordion” open=”false”]Estimated avalanche date: 04/15/2023
Number of Avalanches: 6
Location
Location: Schuylkill Ridge
Location Specific:
Start Zone Elevation: NTL: Near Tree Line
Aspect: E
Characteristics
Trigger: Natural
Trigger modifier:
Type: Soft Slab
Failure Plane: New/Old interface
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: E/NE aspects, numerous bowls.
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Estimated avalanche date: 04/15/2023
Number of Avalanches: 2
Location
Location: Schuylkill Ridge
Location Specific:
Start Zone Elevation: BTL: Below Tree Line
Aspect: E
Characteristics
Trigger: Natural
Trigger modifier:
Type: Soft Slab
Failure Plane: New/Old interface
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: Crossloaded in Great Wide Open
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Estimated avalanche date: 04/15/2023
Number of Avalanches: 4
Location
Location: Poverty Gulch (Pittsburg, Augusta, Baxter Basin)
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: Cascade x1, Mineral/Augusta saddle x 2, Purple Ridge x1
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Estimated avalanche date: 04/15/2023
Number of Avalanches: 1
Location
Location: Schuylkill Ridge
Location Specific:
Start Zone Elevation: ATL: Above Tree Line
Aspect: NE
Characteristics
Trigger: Natural
Trigger modifier:
Type: Soft Slab
Failure Plane:
Size
Relative Size: R2 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: Impressively wide crown for thin soft slab. Failure date estimated, there’s a chance it ran today.
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Estimated avalanche date: 04/15/2023
Number of Avalanches: 1
Location
Location: Mount Emmons
Location Specific:
Start Zone Elevation: ATL: Above Tree Line
Aspect: NW
Characteristics
Trigger: Skier
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: Redwell Basin
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