Tuesday, 15 July 2014

Heavy rain likely today for metro Montreal

I know I promised quiet weather this week for metro Montreal, but first we have to get through Tuesday. What looked like only scattered showers from a low pressure area and cold front is turning into a rather large area of heavy rain with embedded thunderstorms this morning. Heavy rain warnings have now been posted for the St. Lawrence Valley from Kingston to the Ontario/Quebec border. A severe thunderstorm watch for pretty much the same reason is now in effect for metro Montreal and southwestern Quebec. The front is moving into very moist, unstable and humid air and will trigger heavy downpours. Between 25-75mm (1-3 inches) of rainfall is possible in a very short period of time today from about 11am until late this afternoon for metro Montreal. Temperatures will be muggy near 25C (77F). The weather should begin to dry out and cool off by Wednesday morning.

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