Coldest night of the season

Snow and cold greeted Calgary on Sunday after highs of nearly 20C on Friday. Over 10cm of snow fell on southern Alberta. (CTV)

The growing season will come to an end tonight as the coldest air mass of the fall settles into Ontario and Quebec. L'Ile Perrot this morning is wet with showers around and chilly 5C temperatures.Out west temperatures are as cold as -10C in Alberta and Saskatchewan with snow on the ground. Over the weekend a strong storm moved from Alberta into Montana with an area of heavy snow. Over 20cm was reported in Bow Valley with as much as 10cm in Calgary. This storm is diving south into the US plains with snow and cold temperatures. Some of that cold air will filter into our regions tonight after some showers and windy conditions today. Look for lows to be as cold as -5C in Montreal, but all the way below -10C in the Laurentians and Townships.

Skies will be clear tonight but clouds will be on the increase late Tuesday and Wednesday as that US storm starts to move northeast towards the Great Lakes. It will push an area of showers and much milder air into the region by Halloween. At this time Halloween looks wet but warm in Montreal for tricks and treats. I am hopeful the heaviest of the rain will hold off until after the kids return home. Temperatures will be near or above 10C (50F) on Halloween night.

It also snowed in the east this weekend with the observers at the Mount Washington Observatory in New Hampshire sending out a clear message to all.