Observation: Big Cottonwood Canyon

Observation Date
01/18/2018
Observer Name
Greg Gagne

Region:

Location Name or Route
LCC -> BCC
Weather
Sky
Few
Wind Direction
Southwest
Weather Comments
I've experienced colder July 4ths in Vermont.
Snow Characteristics
Snow Surface Conditions
Faceted Loose
Wind Crust
Melt-Freeze Crust
Damp
Snow Characteristics Comments

Wanted to look at snow surface ahead of a hopefully approaching winter storm. Was finding faceted snow and ~5 mm surface hoar on northwest through northeast aspects above about 9k. Warmth and pre-frontal winds will erode these weaknesses at the surface, but would not be surprised to find some weaknesses to remain intact and preserved underneath storm snow.

Red Flags
Red Flags
Poor Snowpack Structure
Avalanche Problem #1
Type
Persistent Slab
Trend
Increasing Danger
Problem #1 Comments

So many weak layers throughout our snowpack on aspects facing northwest through east. Overall the snowpack seems to have adjusted to the wind and storm snow from last week, but these weaknesses are likely to show their hand once again as we put a new load on top.

Comments

Photos of weak snow at the surface, as well as overall weak snowpack. Would not be surprised to find avalanching in any layer.

Video of weak snowpack structure.

If storm holds together, avalanche hazard will be back at Considerable or High by the weekend.

Video
Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Considerable
Snow Profile Coordinates