High humidity acts as fuel for thunderstorms, greatly increasing the amount of energy available. With temperatures well above 40 in many parts of southern Quebec, the table is set.
In fact, the higher the near-surface temperature and the greater the contrast with the cooler air, the more favorable are the conditions for the formation of violent disturbances.
The passage of a cold front will lift this heat accumulated near the ground, forming a violent thunderstorm line that is well organized.
Sunday afternoon will be one to watch as a chill sweeps across the province and heat reaches its peak. Capacity should decrease as the sun goes down.
From Montreal to Quebec
Much of the St. Lawrence Valley is under a moderate risk of severe thunderstorms. The area between Montreal and Quebec, as well as in Monterrey and Estrie, can produce more muscle cells. Even the Outauais can taste it.
Elsewhere, the risk is a step down, but remains to be monitored. Generally, most of Quebec will hear thunder.
A threat not to be taken lightly
The main threat associated with these storm disturbances is heavy rain. More significant is the presence of water vapor in the air, filling storm cells with water. So Charal rain is on the radar. In extreme cases of disturbance, up to 50 millimeters of water can accumulate in a very short period of time.
So consider the risk of aquaplaning. Flash flooding is also possible and this is almost everywhere in the territory.
Strong winds are also possible.
Also see: House collapses after lightning strike in US
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