Rudi Mair on Youtube

Learn more about avalanches through the ten main danger patterns defined by the Tyrol Avalanche Warning Service.
Weather patterns occurring over the winter often repeat themselves. Rudi Mair and Patrick Nairz, both seasoned professionals at the Tyrol Avalanche Warning Service, recognized this phenomenon and derived ten consistently recurring avalanche danger patterns from it. With their help, you can become an expert, too!

Don Sharaf on Vimeo

Don Sharaf and I performing a variety of stability tests on a NE facing 20 degree slope about 9100 feet ASL. When dealing with Deep Slab problems, test results can be misleading or hard to interpret. This video shows and extended ECT (200cm x 30cm) followed by a normal ECT (90×30) and a PST test. All three test reveal moderate to high strength, poor structure and high likelihood of propagation. This is the trickiest of avalanche problems – it may be hard to initiate failure on a slope, but once it initiates the likelihood of large, dangerous avalanches is quite high. Only one thing will heal this wound – time.
Americanavalancheinstitute.com

Deep Slab instability in the Wasatch Mountains Feb 2014 from Jake Hutchinson on Vimeo.

Bruce Jamieson talks on Vimeo

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This presentation is similar to one presented at the ISSW 2013 in Grenoble France. The paper corresponding paper is posted at ucalgary.ca/asarc/issw2013/Iso31k_Jamieson

ISO 31000 and avalanche mitigation projects from Bruce Jamieson on Vimeo.

 

Based on an ISSW 2009 paper by Bruce Jamieson, Juerg Schweizer and Cora Shea, the presentation uses an event tree, an expert survey of triggering odds, Canadian Accident data and some large assumptions to calculate the risk of death for a day of backcountry skiing at each of the levels of regional avalanche danger. The backcountry skiing risks are compared with the risks for a day of kayaking, a day of rock climbing and a day of mountaineering. During Considerable avalanche danger, backcountry skiing risk is about 10 times higher than when the avalanche danger is Moderate. The paper is posted at ucalgary.ca/asarc/system/files/RiskCalc_Issw09_Jamieson.pdf

 

Considerable avalanche danger: How much riskier is it? from Bruce Jamieson on Vimeo.