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Small Slab - Gray Butte - West Face

Location Name: 
Gray Butte
Region: 
Mt. Shasta
Date and time of avalanche (best estimate if unknown): 
Wed, 03/01/2023 - 12:00pm
Observation made by: 
Public
Red Flags:
Recent avalanche activity
Obvious avalanche path
Terrain Trap

Location Map

96067 Mount Shasta , CA
United States
41° 20' 47.3316" N, 122° 11' 55.8816" W
See map: Google Maps
California US

Avalanche Observations

Details

West Face of Gray Butte, near treeline, small skier triggered storm slab. Nobody caught or injured.

DATA CODE: AS-SS-D1-R1

  • 1. Date: 20230201
  • 2. Time: 1200 hours
  • 3. Observer: Public
  • 4. Path Characteristics: Near treeline
    • a. Observation Location: Gray Butte
    • b. Aspect: West
    • c. Slope Angle in Starting Zone: 37
    • d. Elevation: 7,700 feet
  • 5. Event Characteristics
    • a. Type: Slab
    • b. Trigger: Human
    • c. Size: D1
    • d. Snow Properties
      • i. Bed Surface: Storm snow
      • ii. Weak Layer: Unknown
      • iii. Slab: Storm
  • e. Dimensions
    • i. Slab Thickness: 4 inches
    • ii. Width: 50 feet
    • iii. Vertical Fall: 50 feet
  • f. Location of Start Zone: Near treeline, top of chute
  • g. Terminus: Below treeline, dense trees
  • h. Total Deposit Dimensions: not taken
  • i. Avalanche Runout Angle: not taken

Characteristics

Avalanche Type: 
DrySlab
Trigger type: 
Skier
Slope: 
40degrees
Aspect: 
West
Elevation: 
7 700ft.
Terrain: 
Near Treeline
Weak Layer: 
Storm Snow
Bed Surface: 
Storm Snow
Crown Height: 
Less than 1 ft
Avalanche Width: 
50ft.
Avalanche Length: 
50ft.
Number of people caught: 
0
Number of partial burials: 
0
Number of full burials: 
0

Weather Observations

Details

Statistics

Cloud Cover: 
Clear
Blowing Snow: 
No
Precipitation: 
None
Air temperature: 
Below Freezing
Air temperature trend: 
Static
Wind Speed: 
Calm