Observation: Upper Days

Observation Date
12/27/2019
Observer Name
mackenzie
Region
Salt Lake » Big Cottonwood Canyon » Days Fork » Upper Days
Location Name or Route
Upper Days
Weather
Sky
Few
Wind Direction
Southwest
Wind Speed
Light
Snow Characteristics
Snow Surface Conditions
Powder
Faceted Loose
Snow Characteristics Comments
Dry loose precip and decomposing precip sitting on older near surface facets. No evidence of new snow soft slab, easy to move fast moving but isolated sluff not fanning out much. Evidence of older faceted snow buried 1 meter plus.
Red Flags
Red Flags
Poor Snowpack Structure
Avalanche Problem #1
Problem
Persistent Weak Layer
Trend
Same
Problem #1 Comments
I'm putting the persistent weak layer above the loose storm snow. Even though it seems to be sitting dormant right now, the buried depth hoar is still there in all areas holding old snow, even those that ran during the Thanksgiving cycle causing a poor snowpack structure. I suspect with additional water weight or a large enough trigger, we could easily see this layer being re activated. In addition, there is still potential to trigger this layer in a shallow trigger scenario where weak snow is closer to the surface and bringing down a large deadly slab.
Avalanche Problem #2
Problem
Wind Drifted Snow
Problem #2 Comments
Athough winds have been light overnight and today, we found some shallow wind slabs from yesterdays AM winds on northly ridgelines now hidden below a few inches of storm snow.
Snow Profile
Aspect
North
Elevation
9,500'
Slope Angle
35°
Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Moderate
Coordinates