Observation: Butler Fork

Observation Date
12/29/2015
Observer Name
mark white
Region
Salt Lake » Big Cottonwood Canyon » Butler Fork
Location Name or Route
The Nipple, Butler Fork, Reynolds peak, Mill D
Weather
Sky
Overcast
Precipitation
Light Snowfall
Weather Comments
Light snowfall throughout the day not adding up to much, a few intermintent breaks in the cloud cover, no wind in the terrain covered.
Snow Characteristics
New Snow Depth
2"
New Snow Density
Low
Snow Surface Conditions
Powder
Melt-Freeze Crust
Snow Characteristics Comments

Settled powder on all aspects except for a melt freeze crust on due south. supportable boot deep penetration while skiing and breaking trail.

Comments

Route today was up Mill D, pass Dog Lake, across the top of Big Water and Soldier Fork to the Nipple in Buttler Fork. Was wondering if Soldier fork had avalanched during the cycle but saw no evidence suggesting it had, but that doesn't mean it didn't, I have seen allot of slopes that didn't seem to slide during the storm but upon closer inspection an probing revealed they did. Crowns have been blown in and debris have been covered with new snow, on some slopes the only way to tell is to get on the slope and probe with a pole to find the depth of the snow pack which my be a risky undertaking on steep slopes like Soldier Fork. The snow on the nipple was about in the 4 ft range with rounding and compressed facets at the bottom but they had been compressed to only about 2 to 3 inches and did not seem reactive, the rest of the snow pack was right side, up denser at the bottom gradually getting less dense as you worked up through the pack, not much of a slab in that location. On our returns we went to the top of Reynolds Peak to have a look at the NE face, people were nibbling on both sides of it but not the center, of note skiing the skiers right side where most of the tracks were is not the safest practice, that side is steeper, more north facing, which means it has more facets in the basement and more prone to avalanche then the main face in my opinion. upon pole probing on the more eastern aspect of the main face we discovered that there was only one and a half to two feet of total snow pack which meant it must have avalanched sometime during the storm.

Thinking moderate on the hazard but that doesn't mean some slopes won't avalanche, still thinking dangerous slides can occur on high elevation, wind loaded step slopes with thin rocky areas as a likely trigger.

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