Observation: Weber Canyon

Observation Date
1/11/2013
Observer Name
jg
Region
Uintas
Location Name or Route
Weber Canyon
Weather
Sky
Obscured
Wind Direction
West
Wind Speed
Moderate
Weather Comments
Cold day in the mountains today, one of the coldest I have been out in this season - wind didn't help. Wind was blowing at moderate speeds later in the day and moving snow in open terrain. Low visibility.
Snow Characteristics
New Snow Depth
12"
New Snow Density
Medium
Snow Surface Conditions
Powder
Dense Loose
Snow Characteristics Comments
In open terrain the wind was creating a more dense upper layer in the new snow, capping less dense storm snow. The wind was moving a fair amount of new snow and cross loading slopes. Winds were from the west. In sheltered terrain the snow made for fun sliding.
Red Flags
Red Flags
Wind Loading
Cracking
Collapsing
Poor Snowpack Structure
Red Flags Comments
Cracking and collapsing were experienced on the up and the down. Long running shooting cracks in the snow. Wind was transporting snow and creating moderately dense wind drifts.
Avalanche Problem #1
Problem
New Snow
Trend
Same
Problem #1 Comments
Snow was VERY sensitive where the wind was able to affect the new snow. Cold temps will prolong the amount of time the snowpack adjusts to the new load.
Comments
The snow was most sensitive in terrain that was more open and affected by the wind. We experienced collapsing and cracking when the slope angle approached 30 degrees. Shooting cracks that propagated for 30 feet or more were common. New snow was failing both above and below the newest rime crust on faceted snow. Snow was well behaved in sheltered terrain out of the wind. Lingering instabilities will be prolonged by forecast cold temps.
Shooting cracks in the new snow.