Subject: | [MCR] Evening Ridge area / West Kootenays / South Selkirks |
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Date: | Mon, 6 Dec 2010 08:38:04 -0800 |
Some more
observations from another AST course yesterday.
7:20am in
Nelson (550m) -3.5C
8:00am at
Evening Ridge Parking (1500m) -16.5C (Yikes!)
At noon at
~1600m it was -6C and clear with thick valley fog. On a low
angle southerly aspect the tree bombs started firing left, right and
centre. Definitely the biggest hazard of the day. The 15cm surface
layer from the last storm was very low density but we saw it densify enough over
the day to produce small soft slab avalanches with tree bomb triggers on a west
aspect. We didn't get very high, but It would have been interesting to see
what the temps were at higher elevations with the inversion.
Warmer temps earlier
in the week have settled out the midpack nicely and it carries a skier much
better than it did last Sunday. Some less consolidated snow still exist
beneath the early Nov. rain crust but this crust is starting to break
down.
Of note was a
significant surface hoar layer with crystals in the 3-6mm range but some up to
10mm! This could be problematic if the forecasted warm snow amounts to
much.
Cheers,
Shaun King ACMG / UIAGM Mountain Guide
Mountain Sense Guiding &
Instruction
_______________________________________________ These observations and opinions are those of the person who submitted them. The ACMG and its members take no responsibility for errors, omissions, or lapses in continuity. Conditions differ greatly over time and space due to the variable nature of mountain weather and terrain. Application of this information provides no guarantee of increased safety. Do not use the Mountain Conditions Report as the sole factor in planning trips or making decisions in the field. Please check out http://acmg.ca/mcr for more information. |
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