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Warm fall weather finally arrives

Issued: Monday, Sept. 22, 2014 – Covering: Sept. 24 - Oct. 1, 2014

It took a little longer than expected, as a secondary area of low pressure brought clouds and showers to most regions early last weekend, but a western upper ridge of high pressure is finally moving in, bringing with it much-anticipated warm, dry weather.

This upper ridge will bring mainly sunny skies along with warm temperatures to pretty much all regions this week. Daytime highs should be in the low to mid-20s on most days, with overnight lows expected to be around 10 C. At the surface, an area of low pressure is forecast to slowly build to our southwest late in the week, then track eastward over the weekend. This low will generate strong southerly winds ahead of it that will help boost high temperatures into the upper 20s Friday and Saturday.

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The main low should push by on Sunday and drag a cold front across southern and central regions sometime during the day. We’ll likely see a quick round of showers or possibly even thundershowers Sunday, depending on whether the front moves through during peak daytime heating.

Next week will start off with an area of arctic high pressure dropping southeastward, bringing cooler weather back into our region. This cooler air, combined with the departing low to our northeast, will likely give us a mix of sun and clouds along with scattered showers Monday and Tuesday. Monday will be the coolest day, with highs only expected to be around 12 C, and there is a slight chance we could see some frost on Tuesday morning if the skies clear out and winds are light. Temperatures should moderate a little as the week goes on, with highs by Wednesday expected to be in the mid- to upper teens as a weak area of low pressure slides through, bringing a chance of showers.

Usual temperature range for this period: Highs, 10 to 21 C; lows, -2 to 8 C.

About the author

Co-operator contributor

Daniel Bezte

Daniel Bezte is a teacher by profession with a BA (Hon.) in geography, specializing in climatology, from the U of W. He operates a computerized weather station near Birds Hill Park.

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