Published on June 22, 2025 at 8:18 p.m.
An explosive thunderstorm potential is scheduled for Monday, but not all regions will be affected. Forecasts.
Another summer day, another stormy day: Quebec has not come out of the wood. Monday could be explosive in certain regions. However, those which are most often the thunderstorm theater will not be part of the decor.
The summer refrain
We owe this stormy potential to the “belt of fire”, a term which often returns in the cuffs this year: this phenomenon surrounds the masses of hot air and instability is created around them. Since southern Quebec will be in the hot air mass on Monday and not on the outskirts, the risk of seeing strong thunderstorms is significantly lower than that of the regions that will surround the crest. Thus, it is in a corridor stretching from Abitibi to Bas-Saint-Laurent, via Chibougamau and Saguenay-Lac-Saint-Jean, that the most important thunderstorms will be likely to occur.
An element that misses the call
The most curious will wonder why it is only the regions at the heart of the “belt of fire” which will have to deal with violent time and they are right to ask the question: it is rather surprising as a phenomenon. In fact, it is the absence of a crucial element in the formation of thunderstorms that will miss the call in southern Quebec on Monday. Everything is a question of uprising. For an explosive thunderstorm to occur, several elements must be united. Essentially, a violent thunderstorm needs the presence of energy in the air, shear, humidity, instability and uprising. However, this last element will only be present in the regions which will be part of the “belt of fire”, therefore excluding the south and the center of Quebec.
These thunderstorms could produce large hailstones, torrential rains, strong gusts, even tornadoes. In places, thunderstorms could pour up to 50 mm in less than an hour.
