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Observation: Logan Dry Canyon
Observation Date
2/20/2014
Observer Name
D Tidhar
Region
Logan » Logan Dry Canyon
Location Name or Route
Dry Canyon
Weather
Sky
Broken
Wind Direction
Southwest
Wind Speed
Light
Weather Comments
Ridge top wind from SW.
Snow Characteristics
New Snow Depth
1"
New Snow Density
Low
Snow Surface Conditions
Powder
Snow Characteristics Comments
Little (<1") fresh snow had fallen in previous 24 hours even at upper elevations (~9000').
Red Flags
Red Flags
Poor Snowpack Structure
Red Flags Comments
No avalanche activity in Dry Canyon had occurred during the recent widespread natural avalanche cycle. None of the major W, NW and N avalanche paths had evidence of slides, nor large open slopes with S, W or N aspects potentially prone to avalanching (note, we did not have a view of the cirque). Cold temperatures appear to have locked up the snowpack considerably. There is little loose snow on the surface, so although there was some wind-loading occurring on N and NE slopes, it was minimal. Some shallow wind slabs were noted just below a NW facing ridge top, the extent of which was not investigated. S and SW aspects had previously been wind scoured and subjected to melting.
Avalanche Problem #1
Problem
Persistent Weak Layer
Trend
Same
Problem #1 Comments
Risk appears to be decreasing for release of a deep slab. The snowpack appears very cohesive and solidified. This observation is specific to the area included in this report.
Avalanche Problem #2
Problem
Persistent Weak Layer
Trend
Same
Problem #2 Comments
Small, local wind slabs could be present below ridges. While likely shallow, these could could sweep one into trees below. This observation is specific to the area included in this report.
Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Moderate
Coordinates