Issued: Monday, August 24, 2009 Covering: August 26 –September 2

Last week’s forecast appeared to be a bit of a bust, with a call for some showers around mid-week and then sunny and warm through the weekend and into this week. As we know for most areas, this is not what happened. The low that was forecast to move through quickly last week did what most lows have been doing this summer: slowing down and stalling out over Ontario. This kept us in a cool, damp, northerly flow for a good chunk of the week.

Then, to add insult to injury, the system forecast for this week moved in quicker than anticipated, bringing clouds and showers early in the week instead of mid-week.

During this forecast period it looks like we will once again be stuck between the ridge of high pressure to our west and the trough of low pressure to our east. This means we will be in a predominantly northwesterly flow. In this flow we will see what will hopefully be a weak and quick-moving area of low pressure slide through on Thursday and Friday, bringing some clouds and the chance of a few showers.

This low then looks to be flowed by a fairly large area of high pressure. This high should bring a stretch of sunny skies that might even last for more than a couple of days. Overnight lows will start off on the cool side, but it does not look like we will have any worry about frost. As the high pushes to our south we will see our flow switch to a more westerly one. This, along with the sunshine, should allow temperatures to moderate to around average for this time of the year.

Usual temperature range for this period: Highs: 17 to 27C. Lows: 5 to 15C.

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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