Observation: South Tony Grove 11/14/2011

Observer Name:

Weed/Archibald

Region:

Logan
Logan River
Tony Grove
South Tony Grove

Observation Date:

11/14/2011

Weather

Sky:

Scattered

Wind Direction:

West

Wind Speed:

Moderate

Snow Characteristics

New Snow Depth:

New Snow Density:

Medium

Snow Surface Conditions:

Powder

Snow Characteristic Comments:

Substantial stiff wind deposits in exposed terrain features.....

Red Flags

Recent Avalanches

Wind Loading

Cracking

Collapsing

Red Flag Comments:

We noted several good examples of persistent instability including a couple big, several acre whoomfs or audible collapses and spiderwebbing sometimes remote triggered shooting cracks...

Primary Concern

Primary Concern:

Persistent Slabs

Probability:

Considerable

Aspect:

North

Northeast

Northwest

Elevation:

High

Trend:

Same

Secondary Concern

Secondary Concern:

Wind Slabs

Probability:

Considerable

Aspect:

North

Northeast

East

Southeast

Elevation:

High

Trend:

Less Dangerous

snow_profile_location:

Comments - Photos - Videos (group 1)

Traveling on a low angled bench we passed beneath a scoop with a good deal of freshly wind deposited snow.... Even as the second to cross below the scoop, my weight was enough to remotely trigger a collapse and shooting cracks in the outlined shape of a sizable slab, which failed and moved an inch but did not avalanche with the flattening of the slope below.....

Observed Danger Rating:

Considerable

Forecast Danger Rating:

Considerable