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Issued: Friday, May 15, 2009 Covering: May 20 –May 28

It’s an early deadline this week, due to the long weekend, so this forecast was put together a little earlier than usual and therefore confidence levels are going to be fairly low.

There are two pieces of good news in this week’s forecast. The first piece of good news is that the weather models are pulling back on their prediction of significant rain and clouds during the first half of this forecast period. So instead of much of this week being cloudy, rainy and cool, it now looks like most days will see partly cloudy skies, along with temperatures in the mid-to upper teens.

Over the weekend it looks like temperatures will continue to improve, with highs likely making it into the low 20s. We might see a slight cool-down early the following week, but the overall weather pattern looks like it is finally starting to transition to more of a summer-like pattern. The models show the strong jet stream weakening over the next couple of weeks. This will result in a quieter weather pattern with fewer big storm systems.

Now, it doesn’t look like we are going to quickly switch to a hot and dry pattern, but it looks like we should end the month with much more typical late-spring/early-summer weather.

Usual temperature range for this period: Highs: 15 to 27C. Lows: 2 to 12C.

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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