Forecast – for Aug. 19, 2010

Well, I don’t think we’ll have to worry about summer coming to an end and fall moving in just yet. After a little taste of fall over the weekend, it looks like summer will move back in by this weekend, and if the models hold true we should see summer- like conditions right through to at least the end of the month.

Last week’s forecast played out pretty much as expected, but a few small deviations can make a fairly big difference. The strong area of low pressure that was forecast to move to our northeast last weekend ended up being stronger than forecast, and it also moved a little slower. This allowed clouds, showers and cool air to move in on Saturday and then linger over central and eastern regions on Sunday.

This forecast period looks like it will be controlled by a large area of high pressure over Ontario and a large, weak, disorganized region of low pressure to our west. Put together, the flow of air around the eastern high and western low should result in a good solid flow of southerly air for our region and that means warm temperatures. By Friday we should see highs pushing the upper end of the usual temperature range for this time of the year and those temperatures should continue right through the weekend.

By Sunday, the western low will try to push through and this might trigger a few thunderstorms late in the day. Once the low pushes by early next week, weak high pressure will move in. This should bring us more sun than clouds and slightly cooler temperatures, with highs in the low to mid-20s for the start of next week.

Usual temperature range for this period: Highs:19 to 29 C.Lows:6 to 15 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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