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Sunday, December 27, 2009

[MCR] Temperature inversion Rockies

There is a significant temperature inversion that ice climbers need to pay
attention to. Although valley bottom temperatures are -15 to -20, at ridge
top, temperatures during the day have gone above freezing. At midnight it
was -1 on the summit of Bourgeau and +2 by 11:00 am. This is a serious
consideration for all ice routes with start zones above them especially on
southerly aspects. This inversion is forecasted to continue for at least
one more day.

Marc Ledwidge
Manager, Mountain Safety Programs
Banff, Yoho and Kootenay National Parks
220 Hawk Avenue
Box 900, Banff, AB
T1L 1K2
Ph: 403-762-1401

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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.
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