Bulletin d’avalanche – 17 mars 2020

Avalanche Bulletin - 2020-03-17

A storm is coming tomorrow with southerly winds 80 km/h and new snow. Watch out!
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: 2020-03-16 @ 18:00
Valid until: 2020-03-17 @ 18:00
Danger ratings Tuesday Wednesday Thursday
Alpine Considerable Considerable Moderate
Treeline Considerable Moderate Moderate
Below treeline Moderate Low Low

Avalanche problem #1 : Wind slab

A storm is coming tomorrow in the middle of the day and will bring 10-15cm of snow between midday and midnight. With the winds associated, new wind slabs will form at top of north alpine slope and at treeline, and on north-east and finally east aspect during the night and Wednesday morning. Keep in mind that wind slabs are more reactive when they form. The danger rating will increase all day long to reach CONSIDERABLE at the end of the day or at night depending the exact moment the storm will hit. At that moment, human-triggered avalanches will be likely.

Avalanche activity

A natural wet loose avalanche size 0.5 has been observed on a SW slope of Mines Madeleine. Also, 2 other avalanches (size 1,5 and 2) from the last storm has been observed in the middle of the «couloir en S« and in Freak and SuperFreak in the Mines Madeleine. Thanks for sharing your observations at info@avalanchequebec.ca, on the Avalanche Canada’s Mountain Information Network or with this online form.

Snowpack

Conditions in general for the alpine and at treeline has highly been affected by winds. Thick hard wind slab can be found on SE-E-NE aspect. West aspects has few or no snow. Below treeline, it is still possible to find powder snow where it is protected from winds.

Weather forecast

Monday night: No precipitation, wind at ridgetop of 50 km/h from SW, temperature in the alpine of -12 C.

Tuesday: 10 to 15 cm of snow starting at midday, wind at ridgetop of 80 km/h from the S and then SW, temperature in the alpine of -7 C.

Wednesday: Less than 1 cm, wind at ridgetop of 45 km/h from the W, temperature in the alpine of -15 C.

Thursday: No snow, increasing cloudiness at the end of the day, wind at ridgetop of 30 km/h from the W, temperature in the alpine of -9 C.

Message

We keep producing a daily avalanche bulletin and report to maintain the safety of the people that goes in the backcountry. But, did you think to available ressources in case of an accident? The Sépaq is now generally close and not there to coordinate a rescue and the police, the medic and the firefighter might be busy with the rest of the population… Think about it!

Snow report

Centre de découverte et de services - Mis à jour le 16 mars 2020 à 08:56

24 h 48 h 7 jours Saison Au sol
1 cm 6 cm 35 cm 388 cm 0 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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