[MCR] Rogers Pass Ursus area

Public Mountain Conditions Report mcr at informalex.org
Mon Feb 20 19:51:25 EST 2012


Skied Dispatchers/Ursus Trees area today.

Lots of whumpfs and shooting cracks in Ursus Trees. The culprit layer is surface hoar on top of a suncrust on top of facets. This is buried by 50 cm of low density snow. We had a Rutschblock score of 1 on this layer - it failed while cutting the block.

Another group triggered a size 1 wind slab on an open slope at tree line in Dispatchers. It only propagated about 7 m and didn't run far. It failed on surface hoar down 50 cm (no suncrust here) and the slab was very soft.

I think this layer is on the verge of being overloaded on a widespread basis and it is going to be reactive when it is. The slab just needs to be a bit stiffer.

Mark Klassen
ACMG-IFMGA Mountain Guide
alpinism.com

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