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 et Mines-Madeleine.
Issued on : Tuesday April 25th 2017 at 7:45
Valid until : Saturday April 29th 2017 at 7:30
|Danger ratings||Tuesday||Wednesday||Outlook Thursday|
Problème d'avalanche #1 : Wet snow
All melt no freeze spring scenario seems to be the appropriate one for Wednesday, Thursday and Friday. The snowpack will gradually weaken with rain precipitations (15-20 mm) expected Wednesday and high freezing levels (3000 m) forecasted until Saturday. WET SLABS avalanches and LOOSE WET avalanches are anticipated on all slopes and at all elevations. With CONSIDERABLE danger rating, natural avalanches are likely and skier triggered avalanches are likely. These slides can be large enough to bury, injure or kill a person (size 2+). Choose your route carefully and reduce your exposure to overhead avalanche terrain.
Problème d'avalanche #2 : Cornice fall
Weather forecasts for Wednesday, Thursday and Friday are also favourable 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.
Following cold temperatures on Monday, the upper snowpack is all frozen solid. Above 0C temperatures, strong South winds, rainy precipitations, cloud cover and no overnight freezing will progressively weaken and destabilise the snowpack. It will become moist then wet and isothermal (0C) as early as Wednesday and will remain so until Saturday.
Tuesday will be a sunny day and temperatures will warm up to reach +4C on the summits this afternoon, along with light South-West winds (20km/h). A warm rainy spell will reach the Chic-Chocs bringing significant amounts of rain (15-20 mm), strong winds (60-70km/h) Wednesday and Thursday morning. Air temperatures will rise gradually from +4C (Tuesday) to +10C (Friday). No overnight freezing is expected before Saturday night and freezing levels will fluctuate between 2000 and 3700m. For more details, check out our alpine weather outlook (French, but you can use Google translation)!
Please note that this bulletin is valid from April 25th to April 28th (4 days). The last avalanche bulletin will be issued on Saturday, April 29th at 7h30. Recreational winter activities are permitted in Gaspesie National Park until April 30th and until the complete meltdown in Chic-Chocs Wildlife Reserve.
Centre de découverte et services (CDS) - Updated on 25 April 2017 - 5:48
|24 h||48 h||7 days||Saison||Snow depth|
|0 cm||1 cm||6 cm||449 cm||50 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.