Thursday, 9 July 2015

Dry weather into the weekend for Montreal

Despite the cooler and wetter than normal summer in Montreal to date, people continue to enjoy the outdoors like those sailing on Lac St. Louis in Lachine on Wednesday. (ValleyWX)
 Despite the cloud cover across southern Quebec today, it looks like we are in for a relatively dry stretch of weather through Sunday. I say relatively, because as the heat and humidity builds over the weekend, there will be a chance for an isolated shower or thunderstorm. The main storm system will pass well south of the region across Pennsylvania with clouds stretching north into the St. Lawrence Valley. At this time most of the precipitation will remain across southern New York and Vermont. Temperatures will be at or just slightly below normal into the weekend for Montreal with highs of 24 to 28C (76 to 83F) and lows of 16 to 19C (60 to 66F).

The weather pattern shown above that has chilled our summer in Montreal so far, is expected to continue. (

The trend of hot and dry weather in western Canada and cooler wet weather across the US northeast, Quebec and Ontario, looks like it will prevail into the middle of the of the month at the very least. The map above shows the pattern that has been with us for most of May, June and July. With the polar jet riding high in the west and sinking in the east, this summer is starting to look like a typical El Nino one. In between the cool air to the north and sultry air to the south, lots of rain and thunderstorms will continue from the southern plains into the northeast just clipping southern Quebec. While temperatures are not terrible, this is not shaping up to be a hot summer. To date only two 30C highs have been recorded at Trudeau Airport (YUL) this year. In addition to the cooler weather it has been wet with over 150mm (6 inches) of rain in Montreal since June 1st.

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