| AVALANCHE OBSERVATION Hammil Bowl Drainage: |
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| Submission Info Saturday, February 8, 2014 - 3:00pm |
Red Flags:
Avalanche Type:
Slab
Slope:
40degrees
Trigger type:
Natural
Crown Height:
4 ft
Aspect:
Northeast
Weak Layer:
Other - explain below
Avalanche Width:
1 000ft.
Terrain:
Above Treeline
Elevation:
11 000ft.
Bed Surface:
Other - explain below
Number of similar avalanches:
1
Avalanche Photos:
Snowpit or crown profile photo or graph:
Cloud Cover:
25% of the sky covered by clouds
Air temperature:
Above Freezing
Wind Speed:
Calm
Precipitation:
Air temperature trend:
Static
Wind Direction:
Accumulation rate:
None
More detailed information about the weather:
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Large, D4 avalanche. Probably triggered by cornice drop and/ or windloading during Feb 7-10 storm. Failure layer, small, < 2mm facets. Avalanche debris hit Hammil Lake and broke lake ice. Pits dug along flank of avalanche at 10,100 ft. 5-10 crowns ranging in elevation from 10,000 to 11,000 feet. In places above smooth rock surfaces, avalanche stepped down to old depth hoar and facet layers.