WINTER STORM WARNING:
Eastern Ontario and Southern Quebec including Montreal and Ottawa. The winter storm warning has been posted for all of southern Quebec as well as the Ottawa Valley with 15-25cm (6-10 inches) of snow expected before the transition to freezing rain.
Snow has overspread southern Quebec and Eastern Ontario late this afternoon and will continue until well after midnight. The intensity has been light so far but it will become heavy as the evening progresses. A large area of moisture is moving northeast ahead of a warm front lifting across the Ohio Valley and into New York. Low pressure deepening across the Midwest will move into the Great Lakes and down the St. Lawrence Valley Sunday. Heavy snow with blowing snow tonight will mix with freezing rain overnight and eventually change to rain in Montreal and points south on Sunday. Temperatures are very cold right now in Montreal at -12C (10F) with an increasing northeast wind. The mercury will attempt to warm to the freezing point by Sunday morning and up to 5C (41F) during the day. Any rain will change back to flurries late Sunday as an arctic front crosses the region with plummeting temperatures to -11 (9F) by Monday morning. Winds will also increase tonight up to 50km/h and eventually 70km/h on Sunday.
In southern Ontario the snow has already changed to rain and freezing rain in Toronto with a current temperature of 0C (32F).
Next week will be cold with flurries. The coldest air of the season arrives by Thursday with lows in the minus 20's and daytime highs near -20C. Windchill values will also be very low.
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