Thursday, 14 May 2015

A mixed bag of weather for Victoria Day weekend

Gusty thunderstorms on Tuesday produced localized heavy rain (10-20mm) and even small hail as they swept across southern Quebec around 1pm. Winds gusted over 75km/h in Montreal. This storm was moving through St.Laurent (ValeyWX Photo)
After a windy and chilly Wednesday that saw below normal high temperatures of only 15 to 17C (59 to 63F) in southern Quebec, we can expect a much warmer Thursday. High pressure will dominate the weather in southern Quebec through late Friday. It was a chilly start to the day this morning with lows down to 3.8C (38F) here on L'Ile Perrot. A frost advisory was in effect for the St. Lawrence Valley of New York, as well as portions of the Adirondacks, Green Mountains and also eastern Ontario, but there was no frost here at my home on L'Ile Perrot.

The upcoming Victoria Day long weekend is looking just ok. A warm front will produce some showers late Friday into Saturday. Most of Saturday will turn out dry but with plenty of cloud cover. By Sunday warmer and dryer air will be in place. High temperatures will range from 19 to 23C  (66 to 73F) through the remainder of the week. By Sunday we may nudge the temperature up to 24 or 25C (76 to 77F). At this time holiday Monday looks decent, but a rather vigorous cold front will produce showers and perhaps a thunderstorm by late in the day and into the overnight period.

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