Avalanche: Primrose Cirque 3/7/2011

Observer Name:

Nalli

Observation Date:

03/08/2011

Occurrence Date:

03/07/2011

Occurrence Time:

Unknown

Region:

Provo
Provo Canyon
North Fork
Primrose Cirque

Location Name:

Primrose Cirque and Cascade Cirque

Location

40° 24' 27.3672" N, 111° 38' 2.436" W

Avalanche Characteristics

Elevation:

10000'

Aspect:

East

Southeast

Trigger:

Natural

Avalanche Type:

Soft Slab

Depth (avg):

unknown

Width:

Unknown

Vertical:

Unknown

General Comments

This Natural slide likely occurred on the eve of March 7 just after frontal passage. It is at 10,000' in Primrose Cirque, E-SE aspect. I don't have much info on this except it is at least 300' wide and from a distance it appears to be deeper than the amount of storm snow that the Provo area received during this last storm. Storm total was about 12" with 1" of H2O at 7500'. Once it turned NW, it shut right down. With such a small new load, slides like this one and those that Cowboy reported are puzzling. Will try to get more info on what the culprit is soon.

General Comments 2

These are shallower SS-N-D2-S slides that occurred around the same time as the one above. This is Cascade Cirque just NW of Sundance.

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