Friday, 11 September 2015

Fall preview for Montreal this weekend

A cool, wet weekend is forecast for southern Quebec and New England.
 After record high temperatures and a very pleasant start to September, Montreal and portions of Ontario, Quebec and New England are in for a fall preview. A rather potent area of low pressure is forecast to develop today across the southern Appalachians and deepen as it moves northeast into New England. The system will bring an area of rain to Montreal along with cooler temperatures by late Saturday.

Friday will be a nearly perfect day with abundant sunshine and temperatures near 24C (76F). It will remain clear overnight with a low of 12C (54F). On Saturday clouds will increase from south to north with rain developing in the evening. It will be a little cooler with a high near 22C (72F). Saturday night and Sunday the rain will cover the entire region with perhaps over 25mm falling. Cooler temperatures will also prevail with lows in the middle teens and highs Sunday no better than 19C (66F). The start of next week will remain unsettled and cool before we see a return to sunshine and above normal temperatures by Wednesday into Friday.

Heavy rain along the US east coast produced flash flooding. The picture above is from Staten Island, New York on Thursday, September 10. (AccuWeather)

Early this morning heavy rain continues to fall across eastern New England and Atlantic Canada in response to low pressure located near New York City. This storm did not affect southwest Quebec, but did produce record rainfall from Philadelphia to New York City on Thursday. Anywhere from 1 to 4 inches of rain occurred (25-100mm) producing flash flooding in many locations and establishing numerous one day record rainfall totals. Those included Philadelphia with 4.76 inches and JFK in New York City with 1.18 inches.

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