Avalanche Occurrence

View Associated Field Report

A natural avalanche visible from HWY 21 in the Banner Summit zone, near the start of the ascent to Copper Mountain. 7000', WNW.

Observer:

SAC Forecaster

Verified by SAC?

Yes

Occurrence Date:

Dec 21, 2020 (+/- 1 day)

Location:

Base of Copper along HWY 21

# of Avys:

1

Aspect:

NW

Start Zone Elev:

6979ft

Size:

D1.5

Type:

SS-Soft Slab

Trigger:

N-Natural

Width:

80ft

Vertical Fall:

150ft

Weak Layer:

Dec 11, 2020 (FCsf)

Comments:

Weak layer not observed, but strongly suspected.

A natural avalanche visible from HWY 21 in the Banner Summit zone, near the start of the ascent to Copper Mountain. 7000', WNW.