Thursday, November 03, 2016

Cooler weather returns to Montreal to end the week

Much colder air will pour in behind the rain by late Thursday. Some snow flurries are possible by early Friday morning in Quebec and northern New England. (AccuWeather)
Partial sunshine and southwest winds helped drive the temperature up to 15C (59F) in Montreal on Wednesday. It was a welcome return after days of thick clouds and cold, damp northeast winds. Sadly, it won't last. Late fall is a difficult time for prolonged sunshine, as the long nights tend to produce increased humidity levels, helping cloud cover to form during the day, as the atmosphere becomes unstable. Clouds have increased Thursday morning in southern Quebec, and the rain is not far behind. Low pressure will slide along a frontal boundary located across New England today. Rain will develop this morning and persist into the late afternoon. Temperatures will start the day rather mild, around 10C (50F) before the precipitation begins. A cold front will cross the St. Lawrence Valley this evening, with much colder air arriving behind it. Overnight lows will drop close to 0C by morning, with even a few flurries possible in some locations.

Friday will feature more clouds than sun in southern Quebec, along with brisk northwest winds and much colder temperatures of 5C (41F) for Montreal. The weekend is expected to be mostly cloudy, with perhaps a few showers late Saturday. While I expect dry conditions most of the time this weekend, sunshine will be at a premium. Temperatures will be slightly milder Saturday, near 9C (49F), before colder air returns Sunday at 6C (43F). Depending on which extended forecast you believe, the start of November at this time, does look milder than normal.

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