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Observation: South Mountain Glades

Observation Date
3/8/2025
Observer Name
Brian Sparks
Region
Moab » South Mountain » South Mountain Glades
Location Name or Route
South Mountain Glades
Red Flags
Red Flags
Poor Snowpack Structure
Avalanche Problem #1
Problem
Persistent Weak Layer
Trend
Same
Problem #1 Comments
The south mountain glades are broken rock and talus slopes with a lot of air space in the ground which drives vapor movement in the snow pack and forms basal depth hoar. Larger rocks can have bigger voids around them that can produce facet gardens and a weak spot in the slope where an avalanche could be triggered. Broken rock and talus slopes are found through out the La Sal Mountains and similar conditions can exist on these slopes with weak basal depth hoar.
Snow Profile
Aspect
Northeast
Elevation
10,700'
Comments
I toured into the South Mountain Glades. It was a bluebird sunny day with light north winds that were increasing through the day. New snow had settled to 10cm to 15 cm on top of a soft base. Lower elevation slopes had developed a thin breakable crust on friday and became wet by mid day. Upper elevation slopes were more exposed to the north winds and had developed soft wind crusts. The mid elevations were still cold and less effected by the wind and had very good skiing.
I dug a snow pit on sheltered NNE slope at ~10,700ft. A soft slab had formed from recent storms on top of weak facets and basal depth hoar. An extended column test produced an ECTP 21 failure in the depth hoar near the ground. The slab depth will generally bridge the weak basal layer but an avalanche could be triggered in a thin spot or an rea with larger air pockets below the snowpack. This makes for a scary-moderate avalanche hazard.
Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Moderate
Snow Pilot URL