15 cm of snow possible in an area


If the first snowflakes have already fallen in northern Quebec, it would be a first for the more densely populated areas south of the 49th parallel.

The conditions will be met

The coolness, well established over Quebec, will favor the formation of solid precipitation towards the end of next week. An atmospheric trough will effectively encourage the descent of arctic air from the north of the continent. Nighttime temperatures could approach 0°C and even drop below in several places.

Between Thursday and Saturday, all the conditions will therefore be met. The night from Thursday to Friday will be one to watch closely: the absence of sun and the frozen ground could give a boost to the white carpet.

However, several uncertainties remain.

Scenario 1: broadside

MT3 NEIGE 1

A broadside would even be possible for Abitibi-Témiscamingue, and Val-d’Or could be entitled to it. This region is often the first to get snow, starting in the first week of October. A portion of Nord-du-Québec, including the municipality of Chibougamau, is also on the list.


Good to know – The term lined is used when snow accumulations equal to or greater than 15 cm are forecast.


Sectors a little further south could also see snow, but the chances of seeing accumulations are slimmer. The Hautes-Laurentides and Estrie could see some snowflakes, especially in the mountains. For the St. Lawrence Valley, including the metropolitan area, we will still have to wait. The snowflakes generally appear around the last week of October for Montreal.

Scenario 2: missed opportunity

If the temperatures are a little warmer and the low pressure center takes a northerly trajectory, the rendezvous with the first snow may be missed.

MT4 SNOW 2

you made them…

However, keep in mind that this snow could have difficulty accumulating. At the moment, weather models do not agree on the exact quantities expected. The mercury that remains, after all, close to the freezing point muddys the waters. At such temperatures, the snow tends to be heavier and denser, which generally results in lower accumulations. A few centimeters could still fill the floor. Additionally, the path of the system that could bring snow in its wake remains uncertain, and precipitation is dependent on that path.


SEE ALSO: October Preview: A Big Miss

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.