A very warm start to November in Montreal

Summer-like thunderstorms developed Sunday afternoon west of Montreal, eventually crossing the city and surprising many. (ValleyWX)

It was a rather docile weather system that passed across southern Quebec on Sunday, but it was just enough to stir up the atmosphere. In what is more typical of a July afternoon, the brief sun that broke out Sunday was just enough to generate instability in the atmosphere and some potent thunderstorms. The storms swept across Vaudreuil around 3:30pm and then across portions of the Island of Montreal and Laval. Vivid lightning, heavy rain, winds gusting up to 70km/h and even small hail occurred. The brief storms dissipated rapidly after sunset and produced no damage.

September-like week ahead
High pressure will move into the region this week producing sunshine and very warm temperatures for November. The temperature is forecast to be 5 to 10 degrees above the normal long term average of 8C (48F) for a high and 0C (32F) for a low. With the exception of lingering clouds today, lots of sunshine is forecast, another anomaly for November, known as the cloudiest month of the year. Daytime highs will reach 12C (54F) today and as warm as 19C (66F) by Friday. A cold front will approach southern Quebec by late in the week with more seasonable weather and showers by next weekend.

It will be cold somewhere in Canada this week. Parts of the NWT and Yukon have temperatures this morning in the minus teens. Also snow is forecast across portions of the southern Prairies over the next 36 hours with a much as 10cm possible across portions of southern Saskatchewan.