Weekend Update

A heavy thunderstorm is back lit by the setting sun in the Montreal suburb of Lasalle.

Heavy thunderstorms once again moved across Ontario and Quebec in waves yesterday afternoon. I was caught up in one in Lasalle around 7pm last evening. The torrential rains, thunder and lightning were backed by a spectacular setting sun. It was one of the oddest thunderstorms I have seen. A second wave of much stronger storms swept the island around 9pm in the evening. These storms once again produced heavy wind driven rain and lots of vivid lightning. From my vantage point on Ile Perrot we had gusty inflow winds and a spectacular light show, but the main cell passed just to my north.

This morning we are noticeably cooler and drier. The dew point has fallen form almost 22C (72F) down to 14C (mid 50's). This is a very good indication of the much drier and more stable air that has arrived behind the cold front. Today will be variable with a sprinkle or two and a high of 21C, about 8 degrees colder than Thursday afternoon. Skies will clear out tonight for a sunny and dry weekend. Temperatures will be much cooler, 10C tonight and around 23C on Saturday. The heat and humidity will retreat into the middle Atlantic region and southeast before it makes an attempt to move back north into New England, Montreal, Quebec and Ontario by Monday.