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avalanche incident viewer

Date: 2012-04-25
Location: Castlegar - Norns Range
Location Description: Ladybird/Norns drainage North of Castlegar
Province: BC
Mountain Range
Coordinates: 0 0
Elevation: 2100m
Activity: Snowmobiling
Involvement: 0
Injury: 0
Fatality: 0
Description: We were taking a lunch break at the beginning of the "slides" up Norns creek when the slide came down across the valley from us about 700 metres away. We could see many trees swaying and being blown over as well. It appears to have started from a cornice dropping and did create a small slab avalanche that had what I estimated to be a 2-3metre fracture. It also cleared down to rock about 1/2 way down the slope. The small part of the debris field we saw was full of trees and at the end of the runout it was still at least 3 metres deep. Further up through the trees, the debris appeared to be a much greater depth.

Date/time	Size	Type	Trigger	Elevation	Aspect	Slab width	Slab thickness
2012-04-25 11:00	4	L	Nc	2100	ne	250m	-

Present Temp	Max Temp	Min Temp	24hr Trend	Wind Speed	Wind Direction	Sky Condition	Precipitation Type & Intensity
15	-	-	Rising	U	W	BKN	None

Weather comment: This slide surprised us as it was still reasonably early in the day and hadn't really warmed up considerably yet. We expected slides later as the day warmed up but not so early when it was cool still

Snowpack	24hr Snow	Storm Snow	Storm Date
-	0	0	-

Document Date	Title	Source
2012-04-25	Slope	Author
2012-04-25	Slab fracture after Cornice dropped	Author
2012-04-25	Small part of debris field	Author
2012-04-25	Part of the debris field	Author
2012-04-25	Bare Rock Face	Author

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