Avalanche bulletin for the Chic-Chocs

Area concerned:Mont Albert, mont Hog’s Back, Champs-de-Mars, mont Lyall, mont Vallières-de-Saint-Réal, mont Blanche-Lamontagne and Mines-Madeleine.

Issued on : Saturday April 29th 2017 at 7:33
Valid until : Monday May 1st 2017 at 7:30

Danger ratings Saturday Sunday Outlook Monday
Alpine Considerable Moderate Moderate
Treeline Considerable Low Low
Below treeline Moderate Low Low

Avalanche problem #1 : Wet snow

For Saturday, the all melt no freeze spring scenario continues, favoring the activity of wet slabs and loose wet avalanches on all aspects and elevation. With a CONSIDERABLE rating, natural avalanches are possible and avalanches triggered by skiers and snowboarders are likely and could be large enough to bury, injure or kill a person (size 2+). On Sunday, loose wet avalanches are also possible on steep south slopes in the alpine because of intense solar radiation.

Avalanche problem #2 : Cornices fall

Weather forecasts for Saturday are also favorable to cornices falls. Although they remain difficult to predict, their triggers can produce very large avalanches (size 3+), carrying the snow lower on the slope. Be careful as you travel in avalanche run out zones and avoid unnecessary exposure underneath or above cornices.

Avalanche activity

A cornice fall deposit was observed yesterday in the Mur des Patrouilleurs of mount Albert.  Thanks for sharing your observations at info@avalanchequebec.ca, on the Mountain Information Network of Avalanche Canada or with this online form.

Snowpack :

With above 0C temperatures, even on the summits, since Tuesday (April 25), the snowpack has remained wet and isothermal (0C) throughout its thickness. The refreeze forecasted on Saturday night will consolidate the upper part of the snowpack to provide spring ski conditions, at least on South slopes, for Sunday. The freezing level on the rise from Monday will again favor a rapid melting of the snowpack. There is currently about 30 cm of snow in the valley and 150 cm at treeline. 

Weather forecast:

Heat (max + 10C), clouds, showers and winds becoming NW 40 to 60 km/h are forecasted for Saturday. Flurries are possible during the night before a clearing. Despite the expected sun for Sunday, temperatures will remain cold with a maximum of + 4C in the valley and -3C on the summits and winds 20-35 km/h from NW. An increasing cloudiness will follow Monday with warming temperatures, strong southerly winds and rain starting from Tuesday.  For more details, check out our alpine weather outlook (French, but you can use Google translation)!

Message:

This is our last avalanche bulletin for 2016-17 season.  As usual, comments and suggestions are welcomed at info@avalanchequebec.ca.  Thanks for the great winter and see you next fall ! 

Snow report

Centre de découverte et services (CDS) - Updated on 29 April 2017 - 5:55

24 h 48 h 7 days Saison Snow depth
0 cm 0 cm 1 cm 449 cm 30 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:Dominic Boucher
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