Several D1 Kick Test Results, Panorama Dome

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AVALANCHE OBSERVATION
Panorama Dome

Drainage:

Submission Info
Clancy Nelson
Forecaster
Thursday, March 22, 2018 - 12:00pm
Red Flags: 
Recent avalanche activity
Whumphing noises, shooting cracks, or collapsing
Recent loading by new snow, wind, or rain
Avalanche Type: 
Dry
Slab
Slope: 
38degrees
Trigger type: 
Skier
Crown Height: 
2 ft
Weak Layer: 
Storm Snow
Avalanche Width: 
40ft.
Terrain: 
Near Treeline
Elevation: 
8 500ft.
Bed Surface: 
Storm Snow
Avalanche Length: 
50ft.
Number of similar avalanches: 
3
Number of partial burials: 
0
Number of full burials: 
0
More detailed information about the avalanche: 

Slogged up to 8800' over low angled terrain on Panorama Dome mid-day. 65cm of upside-down storm snow. Mix of snow, grauppel, and rain at the trailhead (8300') was mostly snow by 8400', S-1 to S1. Breaking trail and pole probing consisted mostly of falling through the denser top 15cm of moist snow and sinking 2-3', the full depth of the storm snow. Winds were SW and moderate to strong. Plenty of blowing snow and wind transport if exposed areas. Winds and snowfall increased, and visibility decreased, by 1pm so I called it a day. (See video for general conditions.)

Small well supported test slopes had shooting cracking and collapsing. Steeper test slopes consistently released D1 wet storm slabs that entrained the full depth of the storm snow: crowns and flanks 65cm deep on NE facing slopes steeper than 35 degrees (see photos). Adjacet slopes had natural D1s that had released probably right before I got there (earlier this morning).

There appeared to be newer D1-D2 natural released just E and W of Mammoth Rock as well as from the Poop Chute, however visibility was poor.

Just trying to get around out there is a chore, let alone avoiding the avalanche hazard.

Avalanche Photos: 
Avalanche observation video: 
Blowing Snow: 
Yes
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Strong
Precipitation: 
Mixed rain and snow
Air temperature trend: 
Static
Wind Direction: 
Southwest
Accumulation rate: 
Less than 1 in. per hour
More detailed information about the weather: 
Number of People Caught: 
0
37° 37' 7.68" N, 118° 59' 44.16" W

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