Weather forecast predicts an unsettled pattern developing

Issued: Monday, May 11, 2015 – Covering: May 13 – May 20, 2015

Late last week and into the weekend we experienced a classic example of a small change in a weather system that ended up having a big impact on the weather. A large area of low pressure moved up and passed through our region late last week as forecast, but the system ended up being a little bigger and took a slightly different path than expected. The end result was much cooler air being pulled in behind the low.

After a cool start to this week and another strong area of low pressure just clipping our region to the south, it looks like things will settle down for a few days. Overall, though, our weather pattern looks to stay fairly active, as the main storm track appears to be taking shape across the northern U.S.

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Cool high pressure will build into our region on Wednesday, bringing sunny skies and high temperatures in the low to mid-teens. Thursday and Friday’s forecasts are a little tough as another low is forecast to track near or just south of Manitoba during this time. It’s hard to say if the high to our north and east will win out, or if we’ll see clouds and showers move in. Either way, temperatures shouldn’t be too bad, with highs in the mid-teens if it is cloudy, or upper teens to low 20s if we see more sunshine.

The long weekend’s forecast is also a tough one, as it looks like the battle between cool high pressure to our north and an active storm track to our south will continue. Currently, it looks like Saturday will be a nice day, with partly cloudy skies and highs in the upper teens to low 20s. The weather models are having a tough time with another low-pressure system forecast to develop over the weekend, so confidence in this part of the forecast is low. It looks likely that we’ll see some showers move in on Sunday, with fairly cool air moving in on Monday and Tuesday and highs only expected to be in the low teens.

Usual temperature range for this period: Highs, 13 to 25 C; lows, 0 to 9 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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