11th Annual Utah Snow & Avalanche Workshop Open and Motorized Sessions Oct. 27th.
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Observation Date: 
2/6/2016
Observer Name: 
Travis Nauman
Region: 
Moab
Location Name or Route: 
La Sals - Corkscrew
Weather
Sky: 
Clear
Wind Speed: 
Calm
Weather Comments: 
Lots of sun, only a very slight breeze at the exposed shoulder at the top of Corkscrew
Snow Characteristics
Snow Surface Conditions: 
Powder
Dense Loose
Wind Crust
Snow Characteristics Comments: 
Felt pretty stable in the forest, but anywhere the wind or open sky has been able to play with the snow, it gets weird. Once above 10,000' we got multiple whoomps on anything with wind structure or slab cohesion, and stayed on very conservative well anchored and sheltered slopes.
Red Flags
Red Flags: 
Recent Avalanches
Wind Loading
Cracking
Collapsing
Rapid Warming
Poor Snowpack Structure
Avalanche Problem #1
Type: 
Persistent Weak Layer
Trend: 
Same
Problem #1 Comments: 
See snow profile narrative. The interface under the last snow had a faceted layer that is pretty scary.
Avalanche Problem #2
Type: 
Wind Drifted Snow
Trend: 
Same
Problem #2 Comments: 
There has been a lot of wind transport, and a pillow on low angle test slope above Noriega collapsed with a bit of propagation - crack went out ~5 ft.
Snow Profile
Aspect: 
Northwest
Elevation: 
10200
Slope Angle: 
31
Comments: 
Along the edge of one of the main open shots in Corkscrew we dug a pit (see details below). At 38 cm depth we had an ECTP 23 Q2 with full failure at 30, which got our attention. So we decided to stick along the trees to climb and as a friend put the tip of his ski up on the edge of the pit there was a loud whoomph, and a crack propagated a good 30 feet out into the opening and another buddy and I in the trees could feel the vibrations clearly. That kept us out of everything not well anchored for the rest of the day. Be extremely careful as we also felt some smaller failures on the wind pillows on top of the ridge above Noriega's face. There are slabs wanting to come down the mountain right now, caution is key!!!!! The snow profile interface wasn't working so here it is: 10,150 ft, 31 deg slope, NW aspect (328 deg) 11AM 25 deg F air temp 0-11cm, Fist, Facets, 27 degF 11-38 cm, 4F, Rounded, 38cm: ECTP 23 Q2, completely failed at 30, full propagation 38-61cm, 1F-4f, Rounded 61-155, 1F 155-160, depth hoar, but not really that much
Today's Observed Danger Rating: 
Considerable
Tomorrows Estimated Danger Rating: 
Considerable
Snow Profile Coordinates: 
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