CNFAIC LogoCNFAIC Logo

Observations

Region: Turnagain
Location: Seattle Ridge
Observer:
Date:

Route & General Observations

Took the snowmachine up-track to Seattle Ridge, starting at the Turnagain Pass RWIS station at 1020ft.

Red Flags

Obvious signs of instability

Recent Avalanches?NoCollapsing (Whumphing)?YesCracking (Shooting cracks)?Yes

Observer Comments

Pole tests as we neared Seattle Ridge revealed a developing wind slab.

Weather

Weather

No new snow. Wind ranged from calm at the trailhead (1000') to moderate on Seattle Ridge. Temps in the mid to high 20s(F).

Snow Characteristics

Snow surface

There was very large (5mm+) surface hoar up to the lower valleys. As we neared the ridge (starting at ~2070') there was some wind affect, and the ridge itself bears the signs of a developing wind slab.

Snowpack

HS 30-35cm. Faceting settled snow from October 29th snowfall. Ground on the ridge was lightly frozen, and the beginnings of a wind slab and cornices were present on the ridgeline, confirmed by pole tests. As we toured up the ridge looking for a place to transition, the soft slab underneath us collapsed, resulting in ~10m shooting cracks.

Photos & Video

Photos



USFS SNOW AND AVALANCHE HOTLINE (907) 754-2369
If you have comments or questions regarding CNFAIC operations or winter recreation management, please email staff@chugachavalanche.org
© 2018 Chugach National Forest Avalanche Information Center. All rights reserved.
FCNFAIC
Donate
If you think a public avalanche
center is important then we urge
you to become a member & donate.


PickClickGive