Observation: Millcreek

Observation Date
3/8/2016
Observer Name
Ted Scroggin
Region
Uintas » Millcreek
Location Name or Route
Mill Creek
Weather
Sky
Few
Wind Direction
West
Wind Speed
Light
Weather Comments
Nice to see a brief return of winter with cooler temperatures this morning and recent new snow. Winds were generally light today even along the ridge lines, they did increase a little around mid-afternoon from a westerly direction.
Snow Characteristics
New Snow Depth
6"
New Snow Density
Medium
Snow Surface Conditions
Powder
Wind Crust
Melt-Freeze Crust
Snow Characteristics Comments
Only a couple of inches of new snow at the trail head and around 5-6" in the upper Mill Creek drainage. The riding and turning conditions were quite nice today on the north facing slopes. I did not spend much of any time on south facing terrain and the wet activity I observed was very minor with the slightly cooler temperatures.
Red Flags
Red Flags
Poor Snowpack Structure
Red Flags Comments
Still kind of surprising to be talking about cold dry loose facets near the ground. Dug around on some north facing terrain and the bottom of the snow pack here in Mill Creek still has loose weak sugary facets near the ground. No alarming stability tests, although I was in a fairly deep snow pack area with about 155cm (62") of snow. The snow pack feels pretty low energy, but I would still be cautious in a more shallow area where a person could still find a weak spot on the slope and possibly trigger a slide breaking into this weak snow near the ground.
Avalanche Problem #1
Problem
Persistent Weak Layer
Trend
Same
Problem #1 Comments
I think this avalanche problem is more likely to occur in a place like the Mill Creek area where the snow pack tends to be a little more shallow than areas on the west side of Hwy 150 and the snow pack structure might still be a red flag.
Comments
Some old news, but came across this likely sled triggered slide from a few days ago. This slope can be a frequent repeater as it gets heavily wind loaded from southwest winds that get channeled through this narrow pass. Riders will often turn out below the top usually lookers left where the slab is thinner and they will collapse the slope and trigger this small but steep east facing slope.
1. The higher terrain around Mill Creek saw it's fair share of recent winds. 2. This pit on a north facing slope still has weak loose sugary faceted snow near the ground, not a big concern where the snow pack is deep, but is a red flag in steep thin areas like Mill Creek.
1. A nice debris pile in the bottom of Cataract Basin. Possibly a cornice fall or wind slab triggered this natural avalanche sometime recently. 2. The views today were quite nice from the top of the Mill Creek drainage looking south into the Left Hand Fork of the East Fork of the Bear.
Today's Observed Danger Rating
Low
Tomorrows Estimated Danger Rating
Low