12th Annual Utah Snow & Avalanche Workshop Open and Motorized Sessions November 2.

Observation: Knob Mountain

Observation Date
4/11/2019
Observer Name
John Pikus & Zeb Engberg
Region
Skyline
Location Name or Route
Knob Mountain
Weather
Sky
Obscured
Precipitation
Light Snowfall
Wind Direction
Northwest
Wind Speed
Light
Weather Comments
Overcast from about 7,000 to 9,500ft and socked in above that elevation. Some light snowfall above 9,000 but nothing significant. Sun never came out during our tour but it did get warm enough to affect low elevation snow conditions.
Snow Characteristics
New Snow Depth
20"
New Snow Density
Medium
Snow Surface Conditions
Powder
Wind Crust
Snow Characteristics Comments
In general seemed like about 20 inches of snow above 9,000 feet. Snow was moderate in density, with a little bit of wind affect in places and a skiff of graupel on top. The snow was right side up in sheltered areas but felt a little punchy where the wind got to it, which in areas we traveled was only within about 200 vertical feet of high ridgelines. Below about 7,800 feet the new snow was starting to feel damp.
Red Flags
Red Flags
Wind Loading
Red Flags Comments
The north-facing bowl we skinned up was almost completely scoured of new snow close to the ridgeline, and fresh cornices were visible above south and east facing slopes.
Avalanche Problem #1
Problem
Wind Drifted Snow
Comments
Traveled on predominantly north and west aspects from 7,000 feet to 10,100 feet this afternoon. New snow seemed well behaved in areas we toured. Encountered some shallow wind drifts on SW and N facing slopes but these were shallow and not sensitive to our weight. No cracking was observed. I would expect a different story on slopes with more of a south or east aspect given the fresh cornices we observed and the predominant wind direction during the storm. All new snow fell atop a layer of crust, becoming more stout with elevation. The new snow was deep and dense enough to keep you off the crust while both skinning and skiing.
Today's Observed Danger Rating
Considerable
Tomorrows Estimated Danger Rating
Considerable
Coordinates

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