Avalanche Details
- Location: Takhinsha Mountains, southwest of Haines
- State: Alaska
- Date: 2013/03/03
- Time:
12:45 PM
(Estimated)
- Summary Description: 4 heliskiers caught in cornice fall, 2 injured, 1 killed
- Primary Activity: Mechanised Guiding Client
- Primary Travel Mode: Foot
- Location Setting: Backcountry
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Number
- Caught: 4
- Partially Buried, Non-Critical: 0
- Partially Buried, Critical: 0
- Fully Buried: 0
- Injured: 2
- Killed: 1
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Avalanche
- Type: C
- Trigger: Unknown
- Trigger (subcode): --
- Size - Relative to Path: --
- Size - Destructive Force: --
- Sliding Surface: --
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Site
- Slope Aspect: --
- Site Elevation: --
- Slope Angle: --
- Slope Characteristic: Ridgeline,Cornice
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Weather Summary
This winter in the area has seen above-average temperatures, with near normal precipitation, and snow levels often hovering around 1000ft. The cold air outbreaks typical of winter have been few and short lived. Storms have been consistent since November, mostly with warm air and tropical connections, leading to a warm, dense snowpack. February was no exception, with 7.02" (17.8cm) of precipitation at sea level in Haines, falling from 6 storms. Only 3 days in February had high temperatures below freezing at sea level. Southerly winds predominated and were strong during storms. February brought very few sunny days to Haines.
1.34" of precipitation fell in Haines from Feb. 27th - Mar. 2nd.
Daytime high temperatures in the 3 days leading up to the accident were 1-4 degrees Fahrenheit higher than the previous week, but there was no strong warming trend. The main change in weather was a clearing of the clouds that had persisted all week.
Clouds cleared on the 2nd of March bringing some of the first strong solar radiation of the season. There was a hard freeze on the morning of the 3rd, followed by strong solar radiation once again. The 3rd brought the largest diurnal temperature spread (17 degrees F) of the last 36 days in Haines. High temperatures in the alpine on the 3rd were estimated to be in the low to mid 20's F.
Accident Summary
Four clients and one lead guide were dropped off on a ridgeline above the Garrison glacier in the upper Kicking Horse valley approximately 10 miles southwest of Haines. [The guided party was planning "heli-assisted touring," backcountry touring from the drop-off point.]
While the group was standing on the ridgeline, the snow they were standing on collapsed underneath them with a big 'whomp', an audible fracture, and them a 'boom'. Four of the five people in the group fell with the collapsed snow ledge onto and down the steep slope below. The section of ridge that broke was estimated at about 40 feet long and about 10 feet wide.
The riders tumbled approximately 600 to 1000 vertical feet before coming to rest close to each other. No one was buried in debris, and at least one person deployed an airbag (this person was remarkably uninjured).
After the fall, one person was found unresponsive, CPR was initated, and he was transported to the Haines medical clinic where he was pronounced dead. Of the three others in the fall, two had serious injuries. The snowboarder who survived sustained multiple femur fractures. One skier had fractures to his hip and nose, and lacerations and contusions on his face/head.
The helicopter that had dropped them off was in the area, and assisted with the rescue.