Irwin Cat Ski Obs

CB Avalanche Center 2018-19 Observations

Location: Kebler Pass Area
Date of Observation: 12/22/2018
Name: IG

Subject: Irwin Cat Ski Obs
Aspect:
Elevation:

Avalanches:

D1’s in Sunset L&R, Round 2, and Assassins.

Small shallow D.5 slow movers in Thornton’s Glade, JA Steep, Not 2 D.
Moonrise Right SS-ASc-R2-D1.5-S PP (20cm x 30m x 35m) Ski cut in moonrise right propagated into moonrise left

Weather: Snowy and Windy with gusty whiteout conditions in the am calming throughout the day. WSW winds though saw evidence of northerly swirling around in Robinson Basin.

Snowpack: The wind picked up early morning and inverted the snowpack with denser snow above
lighter snow. The wind did a number this morning with scouring and drifting at all elevations. Widespread cracking and wind slab development. The Upper Westwall (Moonrise & Sunset) had 20-30cm wind slabs touchy and propagating wide with Several remote triggers. No obvious facets but all running on storm snow density
change. Round two below Moonrise and sunset very touch. Outer Limits shooting cracks but limited movement.
Surhan, Oswald, and Booth all cleaned out full width just stepping on top. Lower and mid west wall produced
cracking with much shallower results and less significant movement, though Thornton’s Glade still produced a
D1. Whiskey/Vodka Shots have a double crust in the top 20 cm’s from 12/19 & 12/21.

Photos: