Wet Slabs around the BWRA

Location Name: 
Wet Slabs around the BWRA
Region: 
BWRA
Date and time of avalanche (best estimate if unknown): 
Sun, 04/08/2018 - 03:18
Location Map: 


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

Observation made by: Avalanche Specialist
Avalanche Observations
Avalanche Type: 
Wet
Slab
Slope: 
41degrees
Trigger type: 
Natural
Crown Height: 
3 ft
Aspect: 
East
Weak Layer: 
Old Snow
Avalanche Width: 
80ft.
Terrain: 
Near Treeline
Elevation: 
8 555ft.
Bed Surface: 
Old Snow
Avalanche Length: 
800ft.
Number of similar avalanches: 
5-10
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: 

Rain above 11K' on 3/6 was intense & has greatly effected the snowpack. Multiple Wet Slab & Cornice fall avalanches were observed to have happened, most of them on N-NE-E aspects, at all elevations. Wet Slabs seem to have failed at a similar interface, ~3' deep. Loose Wet avalanches were also commmon on all aspects. The snowpack has dramatically thinned with the rains, conditions have become poor. Runnels & stress cracks litter the landscape. Photo 1 is above Pickel Meadow, with a wet slab avalanched pocket in the upper exposed face, debris ran ~800'. Photo 2 is SW of "Repeat Offender" above Leavitt Lake Rd. The snow surface was firm but melting with an icy shimmer.

Avalanche Photos: 
Weather Observations
Blowing Snow: 
No
Cloud Cover: 
25% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Moderate
Precipitation: 
None
Air temperature trend: 
Warming
Wind Direction: 
Southwest
Accumulation rate: 
None
More detailed information about the weather: 

The weather on Friday 3/6 was pretty terrible where we observed at 9K' on Hwy 108. Temps were 38F degrees & it was raining sideways. During the most intense durations winds were Extreme (>38 mph) from the SW. Snotels were measuring 2.3-2.6" of rain precipitation from 3/6 through the morning of 3/7. Widespread flooding has occured in all tributaries around the BWRA from this storm. Most stream crossings are dirty exposed canyons, some 3' deep and narrow, many are impassable. Access to Leavitt lake has dissappeared, via LL Rd the crossing at Deadman Creek (photo 3). WARNING expect most creek crossings are hollow & unsupportable. If you are able to cross a stream in the AM, do not expect it to remain for your PM travels. A large amount of soil has been erroded & deposited along flooded stream beds. Snow was forecasted for the tail end of the latest storm, but none has been noticed or it already disappeared.