Avalanche: Tony Grove-Blind Hollow Saddle 12/20/2010

Observer Name:

Weed/McAvoy

Observation Date:

12/21/2010

Occurrence Date:

12/20/2010

Occurrence Time:

Overnight

Region:

Tony Grove-Blind Hollow Saddle
Tony Grove
Logan River
Logan

Location

41° 53' 11.8032" N, 111° 39' 0.684" W

Avalanche Characteristics

Elevation:

8800'

Elevation Range Maximum:

8800'

Elevation Range Minimum:

8600'

Aspect:

Northeast

Slope Angle:

Alpha Angle:

Trigger:

Unknown

Avalanche Type:

Hard Slab

Weak Layer:

Facets Above Crust

Depth (avg):

Depth Range:

12" to

Width:

250'

Width Range:

250' to

300'

Vertical:

200'

Vertical Range:

200' to

300'

General Comments

Darren is examining the deepest part of the crown (a solid meter deep here).... A 1F hard wind slab failed on facets above the 12-12-2010 rain-crust...

General Comments 2

Here is the Theodolite read-out looking down slope from the crown.....

General Comments 3

Darren is using the avalanche as a fairly safe route to the ridge. There is not any unstable snow left on this route...

General Comments 4

Same general area as a slide last year.

These UAC Logo BD Drifts are 176 cm, a little taller than the crown.

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