Observation: Depth Hoar Bowl

Observation Date
1/31/2016
Observer Name
Toddeo
Region
Salt Lake » Mill Creek Canyon » Alexander Basin » Depth Hoar Bowl
Location Name or Route
Bowman Fork to Alexanders via Yellow Jacket
Weather
Sky
Overcast
Precipitation
Light Snowfall
Wind Direction
West
Wind Speed
Light
Weather Comments
Generally light winds, but they did pick up a bit late afternoon. A trace of new snow after 3 pm. Sun quickly gave way to overcast skies about mid day. Not sure if souths got enough sun to get damp, we did not encounter any damp snow.
Snow Characteristics
New Snow Depth
6"
New Snow Density
Low
Snow Surface Conditions
Powder
Snow Characteristics Comments

About 6" in this area, less than I saw in BCC yesterday. Low density. Some sluffing on slopes > 38 of so degrees, minor.

Red Flags
Red Flags
Recent Avalanches
Red Flags Comments
The only red flags observed to day were numerous large sluffs and point releases on most aspects, all debris was soft but some ran over 500'.
Avalanche Problem #1
Problem
New Snow
Trend
Same
Problem #1 Comments

Primary concern was the new snow, some drifts were encountered on the Lower Gobblers ridge.

Avalanche Problem #2
Problem
Wind Drifted Snow
Trend
Same
Problem #2 Comments

We were a bit cautious about some wind slabs underlaying the recent storm snow and avoided the starting zone in Yellow Jacket accordingly.

Snow Profile
Aspect
North
Elevation
9,200'
Slope Angle
30°
Comments

We dug a pit while entering Depth Hoar Bowl in an area protected from above by large trees. WOW, HS = 240 cm or about 100'. Photos of pit below. We were impressed by the upper and mid-pack, very solid. We did not excavate to the ground. A bit of variability with some old wind crusts but no signs of shear planes or weaknesses. Ski pole at the base of the pit is tagging the ground.

Photos below: Sluffs in Toots to Boot and east facing Alexander's. They both looked like minor cornice falls a from above.

Photo below (bad light): Skinning up Depth Hoar Bowl, We felt comfortable walking right up the center of the bowl after viewing two generations of debris from above and below. Typically not the best place to put a skin track, but in this case it was likely the least amount of hazard of all three runs skied today. All of the recent debris was soft and skiable, the older debris consisted of hard chunks and such. We probed for hollow areas while breaking trail. This is an example of skiing a steep line in low danger on a day with typically higher danger.

Hard call on the hazard, I am tempted to say moderate due to the lack of red flags and bomber snow pit data, but with recent activity and forecasted snow I am going to say considerable. We based our travel in Alexander's today in areas that had slid, staying on debris when possible. The fact we were not willing to step out into other areas warrants caution.

Today's Observed Danger Rating
Considerable
Tomorrows Estimated Danger Rating
Considerable