Thursday, September 05, 2013

Widespread frost & freeze warnings

From Environment Canada, frost warning map for southern Quebec for Friday morning. Lows will be near of below freezing in the red shaded areas and between 3 and 5C elsewhere.
Every September I fight the onset of fall and watch helplessly as summer slips away. This morning was no different as I continue to defy the odds and wear shorts to walk the dog despite the 9C (48F) weather here on L'Ile Perrot. We were as cold as 8.6C this morning at my home at around 7am. Skies are clear and winds are light perfect for radiational cooling. We can expect a sunny day with highs trying to reach the 20C (68F) mark. Tonight will be very cold with widespread frost expected north of Montreal and in the hills and mountains south of the city and into New York and Vermont. Lows will range from near 0C (32F) north or the city to around 5C (41F) in metro regions of Montreal and Ottawa. The shorts will stay on tomorrow morning as September 7 is just too early to throw in the flag!

Frost warnings are in effect on both sides of the international border with several hours of below freezing temperatures possible across the Adirondacks of New York and the extreme northern Laurentians. Low pressure moving north of Montreal by late Friday will allow for a moderation in temperatures as we head into the weekend. Showers are possible both Saturday and Sunday as a cold front moves into the St. Lawrence Valley -
but it will not be a washout.

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