Bulletin d’avalanche – 11 février 2019

Avalanche Bulletin - 2019-02-11

Pay attention for new unstable wind slabs in the alpine and at treeline.
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: 2019-02-11 @ 07:30
Valid until: 2019-02-13 @ 07:30
Danger ratings Monday Tuesday Overview following days
Alpine Moderate Moderate Moderate
Treeline Moderate Moderate Moderate
Below treeline Low Low Low

Avalanche problem #1 : Wind slab

Extreme winds (60 to 180 km/h) from the West, North-West and North that have been blowing since Friday night have moved all the available snow. Despite the meager accumulations received in the last week, new unstable wind slabs formed on the old ones that cover the January 24th crust. They are found in the leeward areas such as the top of the alpine couloirs, along the ravines, the convexities and in cross loaded areas in the alpine and at treeline of the N-NE-E-SE slopes. With a MODERATE rating, accidental triggers are possible.

Avalanche activity

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

Snowpack

Extreme W, NW and N winds have been blowing steadily since Friday’s thaw and have redistributed the new snow and ice pellets. The January 24th melt freeze crust is therefore uncovered on the windward slopes and is covered by a succession of hard wind slabs on leeward and cross loaded slopes in the alpine and at treeline. Below treeline, 15 to 25 cm of dense snow covers the January 24thcrust which is very brittle.

Weather forecast

A mix of sun and clouds is expected Monday and the sun will be more present Tuesday. NW winds are expected to decrease gradually over the next 48h. and maximum temperatures will be around -15c on Monday and -13c on Tuesday.

Message

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Snow report

Centre de découverte et de services - Mis à jour le 11 février 2019 à 06:00

24 h 48 h 7 jours Saison Au sol
1 cm 4 cm 21 cm 219 cm 76 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 : JP Gagnon

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