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Issued: Monday, July 20, 2009 Covering: July 22 –July 29

In the words of Environment Canada’s Patrick McCarthy, “it looks like June weather until the end of the month, July in August?”

Last week, it looked like the weather pattern was finally going to shift and we were going to see a sustained period of summer-like weather. Well, now it is looking like we are going to see a bit of a repeat of last week’s weather.

A large upper low is expected to pass through our region on Monday and Tuesday. This low will then get hung up over northern Ontario as it runs into a blocking pattern over eastern North America. Smaller lobes of energy are expected to spin around the large low bringing clouds and the chance of showers nearly all week and into the weekend. Western areas will see the most sun and milder temperatures while eastern regions will be the cloudiest and coolest.

Under this type of scenario, our region will see a predominately northwesterly flow. Combine this with clouds and the odd showers and this means temperatures near the bottom end of the usual temperature range for this time of the year. The models are struggling a little bit right now on just how this upper low will behave, but each of the scenarios that are created end up giving us the same cool weather.

The models are hinting at some warmer weather by the middle of next week, but at this point I think I will have to see it to believe it.

Usual temperature range for this period: Highs: 22 to 31C Lows: 9 to 17C

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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