Observation: Cardiff Fork

Observation Date
3/16/2018
Observer Name
mark white
Region
Salt Lake » Big Cottonwood Canyon » Cardiff Fork
Location Name or Route
Cardiff Fork
Weather
Sky
Scattered
Wind Direction
Southwest
Wind Speed
Moderate
Weather Comments
Blue skies in the morning becoming partly cloudy in the afternoon, moderate to strong winds out of the SW transporting snow to leeward slopes and forming sensative wind slabs. Stayed fairly cool up high, warm at lower elevations.
Snow Characteristics
New Snow Depth
12"
New Snow Density
Low
Snow Surface Conditions
Powder
Melt-Freeze Crust
Damp
Snow Characteristics Comments

The new snow had lightened up and dried out quite a bit since yesterday, with light density powder on the surface of a denser base. Damp snow at lower elevations and on the S facing in the afternoon. The S facing on the ridge to Superior was getting wind scoured down to the old Melt-freeze crust.

Red Flags
Red Flags
Recent Avalanches
Wind Loading
Comments

The main theme of the day in the terrain covered was long running sluffs in the light density snow at the surface and sensitive wind-slabs on the leeward aspects on the high ridge lines. I had wind-slabs on the mind while hiking up the ridge to LSB, the wind was taking the new snow from the S facing and depositing it on the north facing creating sensitive wind-slabs that would break at your feet and were fairly well connected. These wind-slabs were easy to manage with ski cuts and avoidance. In the non wind affected steep N facing terrain long running sluffs could be triggered in the new light density snow on top and they would entrain a fair amount of snow, but didn't seem to be packing much of a punch. The largest wind-slab I triggered was at the top of Little Superior Buttress NE facing it was around 60ft wide and ran maybe 80ft, it was fairly obvious it was going to go and all it took was one steep out on the slope to trigger it.

Photos: The wind-slabs I triggered on LSB, And long running sluffs in wind protected terrain.

With todays wind and more snow in the forecast considerable sounds right for tomorrow.

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