Résumé de l'incident
- Mt Lawson
- Location Description
- 50.77610 °, 115.18460 °
- 2500 m
- A solo scrambler triggered a loose wet avalanche while plunge-stepping on descent of Mt Lawson at an unknown time on May 23, 2016. The subject was reported as overdue on the morning of May 24. Rescue crews flew to the scene and observed the subject's tracks entering a size 2.0 avalanche in close proximity to the normal route on the NE face of Mt Lawson. From the air search no clues were visible. An aerial RECCO search was performed with no significant hits.
Rescuers assessed the scene further and decided to deploy explosives in the start zones above the incident site before exposing rescuers on the ground. Ten bags of explosives were placed in the overhead start zones resulting in several size 2.0 loose wet avalanches, some of which over ran existing avalanche debris in the gully. Public Safety Specialists and Conservation Officers from Kananaskis Country, along with the Banff National Park Dog Handler and avalanche search dog were flown to a safe zone on a buttress adjacent to the avalanche path. As rescue crews began the search, the deceased subject's right knee was just barely visible above the snow surface.
The subject had initiated the slide at approximately 2500m ASL and was carried just under 500m vertical before he was critically buried in a gully feature. Burial depth was an average of 50cm. Subject was buried head down and on his back with his ice axe still attached to his wrist by a leash. Extensive trauma was evident to head and legs. It is unknown if subject was wearing a helmet at the time of the avalanche, but one was not found with him.
|Date/Heure||Taille||Type||Déclencheur||Altitude||Versant||Largeur de la plaque||Épaisseur de la plaque|
|2016-05-23 00:00||2||L||S||2500 m||ne||-||-|
|Température actuelle||Température maximale||Température minimale||Tendance 24h||Vitesse du vent||Direction du vent||Condition du ciel||Type et intensité des précipitations|
Commentaire météo: The recovery did not occur until the day after the avalanche. Rescue crews were not aware of the accident on the day that it occurred. Weather on the day of the event was mostly cloudy with intermittent showers and/or flurries.
|Manteau neigeux||Neige 24 hrs||Neige de tempête||Date de la tempête|
Commentaire sur le manteau neigeux: A 3 day storm had deposited up to 40cm of snow in the Alpine. The incident occurred on the third day of the storm as it tapered off. Numerous Na oose wet avalanches up to size 2.5 were observed on the day of the recovery (one day after the incident occurred). The rescue team used 10 bags (12.5kg) of ANFO in the start zones above the accident site to protect the site for rescuers. This Xh work produced several size 2.0 loose wet avalanches, some of which over ran the site were the subject was recovered.
|Date du document||Titre||Source|
|2016-05-24||Side-view scene photo of Mt Lawson fatal avalanche||Jeremy Mackenzie - Kananaskis Country Public Safety||Vue|
|2016-05-24||Scene photo of Mt Lawson fatal avalanche indicent||Jeremy Mackenzie - Kananaskis Country Public Safety||Vue|