Irwin Cat Ski Obs

CB Avalanche Center2018-19 Observations

Location: Kebler Pass Area
Date of Observation: 04/11/2019
Name: IG

Subject: Irwin Cat Ski Obs
Elevation: 10,400 – 12,000


Two D1’s out of Swill and Bender. The Swill windslab was intentionally skier
triggered and the bender D1 was triggered from kicking cornices that triggered a shallow, reactive windslab.
Bender SS-ASc-R2-D1.5-I U (25cm x 30m x 70m)
Swill SS-ASc-R2-D1-U U (25cm x 25m x 40m)

Weather: Snowing S1 to S2 throughout the day. West winds 10-20 G 35 shifting to northwest mid day. Cold temps with ridge top highs of 11. NW Winds look to be decreasing overnight tonight.

Snowpack: 10- 25 cm new snow throughout UWW, EBM and SBM. Upper west wall start zones are holding the least amount of new snow. In round two and strike three we observed shallow storm slabs breaking
10′ in front of skis. These slabs are not running yet. There is a mid storm instability above the MFcr old snow surface. This is most likely the same, dense 3″ of snow at the base of the study plot boards observed this morning. EBM had 30cm of new snow concentrated on the ridge top. SBM had 15-20cm of new that has not slabbed up by mid day.