Bulletin d’avalanche – 15 février 2020

Avalanche Bulletin - 2020-02-15

Cold temperatures will maintain instabilities of isolated and potentially reactive wind slabs at the tops of E-SE-E alpine slopes.
Areas concerned: Mont Albert, mont Hog’s Back, Champs-de-Mars, mont Lyall, mont Vallières-de-Saint-Réal, mont Blanche-Lamontagne et Mines-Madeleine
Issued on: 2020-02-15 @ 00:00
Valid until: 2020-02-15 @ 18:00
Danger ratings Saturday Sunday Monday
Alpine Moderate Moderate Moderate
Treeline Low Low Low
Below treeline Low Low Low

Avalanche problem #1 : Wind slab

Wind slabs of variable densities were developed due to strong westerly winds of the last few days. These slabs (up to 30 cm) will continue to harden on E-SE-S alpine and treeline slopes with expected strong winds (40-50 km/h) for Saturday. Accidental human triggers by skiers or snowboarders are possible in the alpine, especially on steep convex slopes such as Mont Albert. Beware of instability signs such as shooting cracks as you transition into recent wind affected terrain.

Avalanche activity

A natural avalanche was directly observed at Grand Mur on Mont Albert Friday afternoon on a very steep E facing alpine slope. According to the witness, the crown line was about 30 cm thick and the avalanche ran about 300 m long. Thanks for sharing your observations at info@avalanchequebec.ca, on the Avalanche Canada’s Mountain Information Network or with this online form.

Snowpack

In the alpine and at treeline, strong westerly winds have transported snow from last week. Winds slabs (about 30 cm) have been formed at the top of E-SE-S alpine slopes as well as on cross-loaded areas at treeline. If these slabs are triggered, they have the potential to involve deeper layers which sit on January 26 crust. Below treeline, up to 35 cm of snow now covers the January 26 crust. The snow depth on the ground varies from 80 to 230 cm in general.

Weather forecast

Friday night: Clear, winds at ridgetop 50 km/h from the NW, alpine temperature in the alpine of -20C

Saturday : Mainly sunny, winds at ridgetop 50 km/h from NW, temperature in the alpine of -12C.

Sunday: Snow showers in the afternoon (2-4 cm), winds at ridgetop 40 km/h from SW, temperature in the alpine of -9C.

Monday: Light snow, winds at ridgetop 40 km/h from NW, temperature in the alpine of -12C.

Message

Avalanche Québec will be at Grimpe en ville in Rivière-du-Loup this weekend to discuss avalanche terrain and avalanche rescue gear with ice climbers: https://www.grimpeenville.org/

Snow report

Centre de découverte et de services - Mis à jour le 14 février 2020 à 09:00

24 h 48 h 7 jours Saison Au sol
2 cm 6 cm 30 cm 273 cm 81 cm
Disclaimer This avalanche bulletin is prepared with the most recent weather, snowpack and avalanche activity data available for the Chic-Chocs. It is strictly information that can be used as a part of a decision making process and is not intended to be a replacement for knowledge about avalanche safety including and not limited to safe travel practices and the use of backcountry rescue equipment such as beacon, shovel and probe.

Prepared by : J. LeBlanc

Printer-friendly version Version française
WP Feedback

Dive straight into the feedback!
Login below and you can start commenting using your own user instantly

Retour haut de page