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Observation: 10420

Observation Date
2/16/2024
Observer Name
Hardesty
Region
Salt Lake » Big Cottonwood Canyon » 10420
Location Name or Route
10420
Weather
Sky
Obscured
Precipitation
Light Snowfall
Wind Direction
West
Wind Speed
Moderate
Weather Comments
Light snowfall turning to moderate snowfall by mid-afternoon. Winds from the west with minor transport.
Snow Characteristics
New Snow Depth
4"
New Snow Density
Medium
Snow Surface Conditions
Powder
Snow Characteristics Comments
Excellent riding conditions.
Red Flags
Red Flags
Recent Avalanches
Heavy Snowfall
Wind Loading
Poor Snowpack Structure
Red Flags Comments
Experienced two very minor collapses on east facing aspects today; likely collapsing facets associated with a buried crust 35-40cm down.
Avalanche Problem #1
Problem
New Snow
Problem #1 Comments
Thursday was significantly more sensitive in the new snow; tensile cracks were everywhere on all aspects failing on low density stellars. See photo. Naturals up to 8" deep noted on this same layering in steep terrain. Could not get any cracking or movement on this layering today; ECTNs..although - the wild card - the precipitatoin intensity really picked up as I was leaving late afternoon.
Avalanche Problem #2
Problem
Persistent Weak Layer
Problem #2 Comments
  • On many aspects, facets and surface hoar was buried by the Valentine's Day storm.
On northerly aspects, this layering was easily found but yielded limited results with tests or on test slopes. No cracking/collapsing noted on this layering. I would think, however, that enough wind and more snow would potentially reactivate this layering.
On easterly aspects, I did experience some collapsing on primarily facets and small diameter surface hoar associated with a 2cm mf crust buried 35-40cm down. ECTP20s (and one ECTN27) on this layering owing, in my view, to a more pronounced structure. Still, I did not see any new slides on this aspect in my travels.
  • I do think this layering will settle out in a few days but may remain active with stress - wind/precipitation. Remotes remain possible.
Photo of quick ECT and layering and of surface hoar feather intermixed with near surface facets.
Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
None
Coordinates