BWRA Alpine Loose Wet

Location Name: 
BWRA Alpine
Date and time of avalanche (best estimate if unknown): 
Sat, 04/21/2018 - 13:35
Location Map: 


Red Flags: 
Rapid warming
Obvious avalanche path

Observation made by: Avalanche Specialist
Avalanche Observations
Avalanche Type: 
Wet
Loose/Point-Release
Slope: 
39degrees
Trigger type: 
Natural
Crown Height: 
Less than 1 ft
Aspect: 
Southeast
Weak Layer: 
Old Snow
Avalanche Width: 
45ft.
Terrain: 
Above Treeline
Elevation: 
10 555ft.
Bed Surface: 
Old Snow
Avalanche Length: 
85ft.
Number of similar avalanches: 
More than 10
Number of people caught: 
0
Number of partial burials: 
0
Number of full burials: 
0
Did the avalanche hit a building, vehicle, or structure?: 
No
More detailed information about the avalanche: 

The Loose Wet avalanche activity continues. As we lose 2-3" per day of our snowpack the overnight inversions are not helping the situation. Most of the wet point releases are originating from rocks, heated by intense sun, fanning out small surface sluffs. Surface shimmerof the snow has been created by some radiation/ recrystallization, & is accompanied by a scratchy noise as you slide on it. In photo one I witnessed a small Loose Wet avalanche, starting at some warm rocks on the steep slope in front of me. This event happened at 1:43pm, prime-time for afternoon avalanche activity.

Avalanche Photos: 
Weather Observations
Blowing Snow: 
No
Cloud Cover: 
Clear
Air temperature: 
Above Freezing
Wind Speed: 
Calm
Precipitation: 
None
Air temperature trend: 
Warming
Wind Direction: 
North
Accumulation rate: 
None
More detailed information about the weather: 

Hot & sunny with almost zero wind. Rapid melting is occuring, enjoy the great conditions while they last. The past two evenings have seen a temperature inversion, with Leavitt snotel reading 40F at 6AM & coldest temperatures in valley bottoms.