Bulletin d’avalanche – 12 janvier 2019

Avalanche Bulletin - 2019-01-12

Last storm snow will form new wind slabs.
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: 2019-01-12 @ 07:30
Valid until: 2019-01-14 @ 07:30
Danger ratings Saturday Sunday Overview following days
Alpine Moderate Moderate Moderate
Treeline Moderate Moderate Moderate
Below treeline Low Low Low

Avalanche problem #1 : Wind slab

The 15-20 cm of snowfalls from the last storm and East winds has formed winds slabs that are at the top of W-SW slopes. Forecasted winds for the whole bulletin will blow NW and generate 2 to 3 cm. Theses winds will blow this new snow and the snow already there on SE aspects. New wind slabs will form at the top of alpine E-SE slopes over the Christmas crust, which is still buried near the surface and create a good bed surface for avalanches. With a MODERATE danger rating, skiers can possibly trigger avalanche and get injured as avalanches can push them on rocks and trees lower down the slope.

Avalanche activity

No new avalanche has been observed or reported in the last 24 hours. Please share your observations at info@avalanchequebec.ca, on the Avalanche Canada’s Mountain Information Network or with this online form.

Snowpack

15-20 cm of new snow fell since Wednesday and extreme winds blew from SE-E-NE. In the alpine and at treeline, the crust is present at the surface in areas swept by recent winds and covered by isolated accumulations up to 90 cm on the other slopes. Wind slabs (30-45 cm) of various densities have been observed at the surface at the top of the alpine slopes and on cross-loaded areas at treeline. The snow conditions are still marginal with rocks, stumps and trees on the surface or barely covered by new snow. Travelling is perilous in the Alpine. Below the treeline, about 30-40 cm of snow covers the Christmas crust and the snow height varies between 45 and 90 cm.

Weather forecast

The last storm is now off Labrador. Saturday will be mainly cloudy with moderate NW winds (30-40 km/h) and flurries bringing 2-3 cm. Temperatures will be around -15C with a (really cold!) wind chill at -25C. Sunday, the sun is back but moderate NW winds will blow and temperature will be slightly colder at – 16C with a wind chill at -26C.

Message

The January 8th avalanche accident on Mont Albert raises a lot of interest and questions. Check our Facebook page for the last details. A complete report is now available on Avalanche Quebec’s website.

Snow report

Centre de découverte et de services - Mis à jour le 12 janvier 2019 à 06:51

24 h 48 h 7 jours Saison Au sol
2 cm 7 cm 22 cm 121 cm 44 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 : Laurie Dumas

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