11th Annual Utah Snow & Avalanche Workshop Open and Motorized Sessions Oct. 27th.
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Observation Date: 
1/23/2018
Observer Name: 
Kobernik-Osborne
Region: 
Skyline
Location Name or Route: 
Black Canyon to Reeder Canyon
Weather
Sky: 
Clear
Wind Direction: 
Northwest
Wind Speed: 
Light
Snow Characteristics
Snow Surface Conditions: 
Powder
Damp
Snow Characteristics Comments: 

Slopes facing the sun became damp.  Otherwise, cold powder remains on all other slopes.  Very little wind effect still.  Most places where we jumped off the machines, our boots sank right through to the ground.  Overall depths are around 2 feet or a bit more in the highest terrain.

Red Flags
Red Flags: 
Collapsing
Poor Snowpack Structure
Avalanche Problem #1
Type: 
Persistent Weak Layer
Trend: 
Same
Problem #1 Comments: 

The weak snow near the ground remains the greatest concern.  The last storm didn't really add a whole lot of weight on top of the old weak snow.  The wind did not drift much snow either.  These two factors are why we didn't see any avalanches during the last storm.  However, the weak snow is not going away yet and will need to be taken into account during future storms.

Snow Profile
Aspect: 
Northeast
Elevation: 
10400
Slope Angle: 
30
Comments: 

We performed a couple of stability tests today, one formal and one informal. 

The formal one was an Extended Column Test that propagated after one tap from the shoulder (ECTP-21).  Very clean shear on top of the Christmas facets.

We then widened up the pit and rode a snowbike over the top and had similar results.

Video: 

This weak snow near the ground makes me nervous.  Chances for triggering an avalanche are decreasing right now but it would still be possible.  There is enough danger to keep me off many steep slopes on the north half of the compass.

Obviously, the danger will increase when we add more snow on top of this weak snowpack structure.

Today's Observed Danger Rating: 
Moderate
Tomorrows Estimated Danger Rating: 
Moderate
Snow Profile Coordinates: 
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