Northwest Avalanche Center

Observation: Public

All Observations

Observation Details

Name:
Dallas Glass
Observation Date:
March 7, 2021
Submitted:
March 7, 2021
Zone or Region:
West South
Activity:
Skiing/Snowboarding
Location:
Paradise Area

Triggered Avalanches

Did you trigger any avalanches? 
Yes
Was it intentional? 
Yes
Avalanche Type:
Soft Slab
Size:
Size 1: Relatively harmless to people
Elevation:
6100
Aspect:
NW
Comments:
Near the top of Edith's Rib. 8-10" deep and 20' wide.
Photo:

Signs of Unstable Snow

None reported

Observations

Terrain: Short tour around Edith's Creek and Mazama Ridge today. We wanted to avoid very large avalanche paths like those near Sluskin Falls and even the S face of Panorama Pt.

Avalanche: other than the small wind slab we intentionally triggered. No new avalanches were seen.

Snowpack: About 8-10" (20-25cm) of new snow over the most recent crust (3/5). We found this crust to be largely supportable. A thin and friable ice crust down 6-8" within the new snow produced some isolated cracking as we broke trail. The upper snowpack consists of alternating layers of small rounded grains and strong melt-forms or melt-freeze crusts. We could easily identify the 2/23 AR layer generally down 4-5 ' (120-150cm) and the mid-Jan facet/crust down 10+' (320cm). We did not test the mid-Jan layer today.

Lots of wind transport near exposed ridges. Some slopes formed deep drifts 12-15" (30-45cm) deep and other slopes were scoured to the 3/5 crust.

Weather: Obscured to overcast skies with very light to occasionally moderate snowfall. Moderate SSW winds with light to moderate blowing snow. Some very brief breaks in the clouds were observed.

Media

Wind Transport
Snow profile. Edith's Knob. 6100', WNW
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