Numerous Avalanches in the BWRA

Location Name: 
Numerous Avalanches in the BWRA
Region: 
BWRA
Date and time of avalanche (best estimate if unknown): 
Sat, 03/17/2018 - 11:34
Location Map: 


Red Flags: 
Recent avalanche activity
Recent loading by new snow, wind, or rain
Rapid warming
Obvious avalanche path
Terrain Trap

Observation made by: Avalanche Specialist
Avalanche Observations
Avalanche Type: 
Wet
Dry
Slab
Loose/Point-Release
Slope: 
35degrees
Trigger type: 
Natural
Crown Height: 
3 ft
Aspect: 
Northeast
Weak Layer: 
Storm Snow
Avalanche Width: 
600ft.
Terrain: 
Below Treeline
Elevation: 
9 200ft.
Bed Surface: 
Old Snow
Avalanche Length: 
800ft.
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: 

Well over a dozen R3-D2 slab avalanches were observed to have released mid-storm. All were naturally triggered, soft slabs, with a range of 3 out of 5, & a destructive potential of 2 out of 5. Abbreviated that observation looks like SS-N-R3-D2. Many of the slides seen contained problems that were discussed in yesterdays forecast including: Wind slab, Storm slab, Cornice fall, Loose dry, & Loose wet. The sun & trending warmer temperatures in the afternoon helped produce small Loose wet avalanches that were originating from heated objects. Still no Deep slab instabilities were observed. We still have yet to see a natural avalanche in motion in the BWRA.

Avalanche Photos: 
Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
50% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Moderate
Precipitation: 
Snow
Air temperature trend: 
Warming
Wind Direction: 
Southwest
Accumulation rate: 
Less than 1 in. per hour
More detailed information about the weather: 

The early morning hours were brisk with a moderate wind from the SW. Small doses of snow precipitation gave way to clearing skies & warming temperatures in the afternoon.