Observation: Public

Name:

A lubetski

Observation Date:

December 31, 2020

Submitted:

December 31, 2020

Zone or Region:

East Central

Activity:

Skiing/Snowboarding

Location:

Mission

Did you observe any avalanches?

Yes

Avalanche Type:

Dry Loose (Sluff)

Size:

Size 1: Relatively harmless to people

Elevation:

NTL

Aspect:

NE

Comments:

D1 probably dry loose because top layer was mostly non-cohesive but was hard to tell as wind eroded the slope. By end of the tour, could not see slide path or crown any longer due to wind transport of new snow.

Photo:

Did you see shooting cracks?

Yes, Isolated

Did you experience collapsing or whumpfing?

No

Dug pit on NE facing slope ~6.5k, just east of summit complex. HS 135cm. Shear test showed planar failure 15cm below surface (dec 21/22 crust) and 55cm below surface (dec 9 crust).

During ECT New snow failed on first crust 15-20cm below surface - CTE4 RP. Next failure came 55cm below surface - CTH28 PC.

Some areas had cohesive wind slabs and others had non-cohesive wind transported snow (that will probably form slabs)

Wind slab falling off the side of the skin track