Thunderstorms are expected for both days of a weekend dominated by the presence of warm and humid air hanging over the province. During the weekend, the passage of a cold front causes a mechanism of uplift of the air with stormy potential.
Storm cells in sight
To be watched as storm cells pass on Saturday: the presence of strong gusts as well as possible hailstones which mainly targets the sectors of Abitibi-Témiscamingue, northern Quebec as well as the northern Laurentians, Outaouais and Mauricie . Currently, Abitibi, Matagami and Témiscamingue are on the watch for violent storms.
Return of calm in the evening
Then, calm could be back in the night from Saturday to Sunday. With the heat and humidity decreasing in intensity, convective energy has less of an impact on the province, as does thunderstorm potential.
Sunday scenario
The risk of thunderstorms is back in force on Sunday, this time focusing on the south of the province. The scenario unfolds quite similarly to the previous day. The humidity and the heat which will give rise to Humidex levels of up to 37 in Montreal and Sherbrooke and 36 in Quebec City, combined with the passage of a cold front, allow air to rise. All this propels the risk of heavy rains, strong gusts and large hailstones associated with storm cells, which will manifest themselves in the early afternoon.
Moderate risk
In short, moderate risks for an area including Montreal, Gatineau and Quebec