Observation: Snowbasin Backcountry

Observation Date
4/9/2018
Observer Name
Bryan Stack
Region
Ogden » Snowbasin Backcountry
Location Name or Route
Snowbasin periphery
Weather
Sky
Clear
Wind Direction
East
Wind Speed
Light
Weather Comments
Sunny day with a few scattered clouds. Winds blowing at the ridgetops. During the duration of my tour, the Top of strawberry wind meter read wind speeds in the teens with gusts into the 20s, with temperatures in the high 20s and low 30s. Ogden peak read low wind speeds with gusts in the teens, and temperatures in the high 20s. The snow surface was affected by the sun after mid day, and the surface felt damp at the highest elevations, and slushy at the low elevations.
Snow Characteristics
New Snow Depth
1"
New Snow Density
Medium
Snow Surface Conditions
Melt-Freeze Crust
Rain-Rime Crust
Damp
Snow Characteristics Comments
An hard to ski dust on crust on all slopes at high elevations in the morning hours turned to an enjoyable soft/ but damp surface conditions that were fun to ski. The snow skiied fast until lower elevations. The bottom of strawberry is all melted off. There were wind slabs under the ridgelines which i tried jumping on but were not reactive. These slabs were soft and very shallow (>3”). The winds were blowing a little but there wasn’t any snow available for transport in toured areas. West facing felt scoured and hard, and didn’t soften up during the duration of my tour. West facing was unenjoyable skiing.
Red Flags
Red Flags
Recent Avalanches
Wind Loading
Rapid Warming
Red Flags Comments
With a massive wet cycle observed in the last week, heavy rains and not a deep refreeze my focus was on the layer possibly bridging over the wet snow underneath. I was watching for punching through, wet snow surface clues and for wind deposits. The snowpack felt bombproof under the nice trace of new snow. In some areas where the trace of snow was blown off the surface, what looked like a sheet of ice glowed in the sun. Sisters bowl looks wind loaded at the top, and has some spots where that ice sheet is easily observed. It is important to treat closed resort terrain/ periphery terrain as uncontrolled avalanche terrain. We ski these runs all winter and dont have to worry, but now it is time to get real and be aware of the dangers.
Avalanche Problem #1
Problem
Normal Caution
Trend
Same
Problem #1 Comments
I will definitely be suspicious of all aspects and elevations for wet activity, especially any solar aspects tomorrow. The forecast looks warm and sunny.
Today's Observed Danger Rating
Low
Tomorrows Estimated Danger Rating
Low