April 17, 2023
April 17, 2023
Zone or Region:
Canyon Creek, Bearpaw zone
Did you trigger any avalanches? Yes
Was it intentional? No
Size 1: Relatively harmless to people
Several Wind Slab avalanches triggered on N, NE and NW slopes near treeline today, on both sleds and snowboards. A photo of one observation is included below. In this instance, the shallow wind slab was triggered from the edge, propagating across the convexity and running to mid slope.
Did you observe any avalanches? Yes
Size 2: Could bury, injure, or kill a person
A previous size 2.5-3 avalanche observed on a north aspect slope on across a valley. Likely occurred early in the previous loading cycle. Believed to initiate near the rock bands at the top of the path. Avalanche ran full path, into the timber at the runout. See second photo.
Did you see shooting cracks? Yes, Widespread
Did you experience collapsing or whumpfing? No
We found reactive wind slabs in numerous locations across the zone. Winds were active today, blowing early from the SE and the E and NE later in the day. Blowing snow and active loading was observed, filling in tracks and scouring ridgetops. The most affected terrain was near treeline and above, where convexities were found to be setting up mid-slope loading patterns. Temps were cool, but radiation was felt and observed.
We managed terrain with tighter margins than usual, and sought lower angle terrain sheltered from the wind affect for the best snow.