Tuesday, September 20, 2011

Clearing today


A slow moving and weakening cold front produced some steady shower activity overnight with about 15mm of rain at my home in southwestern Quebec. Most of the rain is off to our south and east and clearing skies are moving this way from Ontario. It will be a rather mild couple of days ahead of us into the first half of the weekend with temperatures in the low to mid 20's (70-75F). Sunshine will return this afternoon region wide followed by clear skies tonight and a near perfect day on Wednesday. Clouds will be on the increase overnight into Thursday as a frontal system and slow moving low pressure head this way just in time for the weekend. At this time showers and mild for Friday and Saturday, with much cooler weather by Sunday.

Fall arrives this Friday and we have some climatic indicators on the weather map. Normally as fall arrives and progresses, the low pressure areas over the continent begin to become much more energetic. We are seeing a gusty low pressure this morning over the Dakotas. This system will produce heavy rain today across southern Manitoba and into Northwest Ontario. Amounts could easily exceed 50mm. Meanwhile on the back side of the storm strong winds are occurring across the Dakotas and southern Saskatchewan with gusts possible over 90km/h/ This system will move east and affect northern Ontario with rain and dare I say perhaps a period of wet snow! Temperatures fall behind the storm, with well below normal readings expected to end the week.

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