Avalanche

South Side

Joe DellaportaMt Hood
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Quick report

Cracking
isolated

The landscape looks a lot different around Mt. Hood after 1.5 inches of snow water equivalent. In general, I typically observed around 15 inches of lightly, wind-stiffened new snow just above the Timberline parking lot at 6000 ft. Drifted areas harbored depths of 2-3 ft.  New snow fell over a stout crust or bare ground below 6000 ft, creating plenty of hidden hazards near the trailhead. 

There was plenty of evidence of recent drifting and some isolated instabilities in drifted terrain along my tour. Digging around in less wind-affected terrain, I typically found a favorable structure over the crust at the new/old snow interface. While I didn't observe any recent avalanches during my field time, a friend reported a small, skier-triggered wind slab that broke 1-2 ft on a wind-loaded feature in the Zigzag Glacier area during the late morning hours. 

Alpine travel has greatly improved thanks to this storm. However, it also masked many hazards, such as open crevasses, bergschrunds, and rocks in previously melted-out areas. Travel cautiously!

Instability was mainly confined to steep, heavily wind-loaded features or sun-exposed slopes near cliff bands that harbored wet snow instabilities as the day heated up.

Weather

Air Temp
High 20s/30s
Cloud Cover
few
Wind Loading
moderate
Rain Elevation
4000 ft
Recent Snowfall
40-50 cm
Snow Avail For Transport
moderate amounts

What a beautiful day! The day started chilly and windy with moderate amounts of blowing snow in the high alpine around the Cooper Spur and Crater. These winds were generally blowing from the NE above 6000 ft. The speeds relaxed into the light range by late morning.

Avalanche

Size
D1.5 R2
Type
SS
Aspect
SW
Trigger
AS
Elevation
8000 ft

Skier-triggered sometime Sunday morning.