Monday, December 05, 2011

Colder weather on the way

Snow in Omaha, Nebraska over the weekend. (

Our very mild fall continued across southern Quebec over the weekend with mostly dry weather and temperatures running 10 degrees above normal. At 7am this morning Montreal was 8C down from yesterday's warm 10C, (the record was 15C set in 1982) the normal high/low for this time of the year is -1 and -8C. We have light rain falling in Montreal as a cold front slowly moves from our northwest towards the St. Lawrence Valley. Impulses of moisture are sliding along that front from the southern US with heavier precipitation. Rain will increase in coverage and intensity today as the front moves into the St. Lawrence Valley. As colder air begins to filter into the region, temperatures will drop from where they sit currently and approach the freezing point by midnight. Look for rain to change to wet snow before ending by mid morning Tuesday. Up to 5cm of wet snow is possible in some locations especially north and west of Montreal towards Ottawa. Temperatures are at the high for today right now and will drop to -1C by Tuesday morning. They should stay there on Tuesday with clouds thinning by afternoon. Much colder air will then move into Quebec and eastern Ontario to end the week with temperatures dropping into the minus teens for lows, the coldest air of the season by Saturday. It will be short lived with more mild air expected next week. But for the short term expect a return to more wintry weather with the likelihood of more snow later this week.

Over the weekend low pressure lifted from Texas to northwest Ontario with a swath of heavy snow falling west of the track. Places like the Texas Panhandle and Nebraska had their first snowstorm of the season with as much as 15cm (6 inches). Behind the front arctic air plunged south. It was very cold once again across Manitoba and Saskatchewan on Sunday with snow and blowing snow. Temperatures this morning are a chilly -19C in Regina and -24C in Winnipeg.

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