Friday, April 27, 2012

Frost Warning

Overnight lows in degrees Fahrenheit for the border region. It will be cold with widespread frost in Quebec, Ontario and New England tonight. (NWS Burlington)

Cold high pressure is settling in behind a departing cold front and low pressure this morning. The storm system that gave the region rain last night is now strengthening over southern Maine. It is forecast to move across Atlantic Canada with heavy rain and even some snow across the lower St. Lawrence and Gaspe area.

Meanwhile in its wake much colder air is settling across southern Quebec and Ontario this morning. Temperatures have fallen with strong northwest winds this morning into the -1 to plus 3C range. With the wind it feels even colder making it rather raw and chilly for late April. Toss in a few snowflakes and we have an unseasonable Friday ahead of us. Things will clear out for the weekend with sunny and dry weather expected but it will be cold. Environment Canada has posted frost warnings for southwestern Quebec and the National Weather Service has them in effect for the St. Lawrence and Champlain Valley's of New York and Vermont where the growing season has started early. Overnight lows will drop to the -5 to -8C range, well below normal, and likely providing a heavy frost if not a solid freeze. If you have anything growing, cover them up to save them. High temperatures across the area under sunny skies will be cold, no warmer than 10C on both Saturday and Sunday.

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