| AVALANCHE OBSERVATION W of Mammoth Rock Drainage: |
|---|
| Submission Info Clancy Nelson Forecaster Friday, March 2, 2018 - 11:45am |
Red Flags:
Recent avalanche activity
Whumphing noises, shooting cracks, or collapsing
Recent loading by new snow, wind, or rain
Avalanche Type:
Dry
Slab
Slope:
35degrees
Trigger type:
Natural
Crown Height:
2 ft
Aspect:
North
Weak Layer:
Storm Snow
Avalanche Width:
100ft.
Terrain:
Below Treeline
Elevation:
8 881ft.
Bed Surface:
Old Snow
Avalanche Length:
187ft.
Number of partial burials:
0
Number of full burials:
0
Avalanche Photos:
Snowpit or crown profile photo or graph:
Blowing Snow:
Yes
Cloud Cover:
100% of the sky covered by clouds
Air temperature:
Below Freezing
Wind Speed:
Moderate
Precipitation:
Snow
Air temperature trend:
Static
Wind Direction:
West
Accumulation rate:
Less than 1 in. per hour
More detailed information about the weather:
Number of People Caught:
0
37° 36' 55.8" N, 118° 59' 37.68" W
See map: Google Maps
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Natural soft slab avalanche occured in the last 24hrs in the steep sheltered trees above the log cabin mine site. Appears to have failed within the new storm snow and stepped down to the facet layer just above the ground. See attached crown profile, maps and photos.
On the way up to do a crown profile, many long (50') shooting cracks on small rollovers (see shooting crack photo).