Southern ridge pattern developing

Weekly weather forecast for July 15, 2013

The only thing that prevented us from climbing into the low 30s last week was the extra cloud sticking around, along with the fairly high humidities.

For this forecast period it looks like summer wants to stick around. The ridge of high pressure that has been periodically building and weakening over the western U.S. is expected to build northwards once again this week, bringing mainly sunny skies along with temperatures in the upper 20s to near 30s.

With our region being stuck near the upper edge of this ridge we can expect a couple of different results. Firstly, our temperatures, while being warm, will not be overly hot. Secondly, we’ll feel the effects of any areas of low pressure that bump into the ridge and then ride over top of it.

The first of these areas of low pressure is expected to bring a chance of showers and thundershowers to most regions late on Thursday. The next chance for more rain will come on Sunday or Monday. As heat and humidity build on Sunday we can expect thunderstorms to develop late in the day and become widespread, lasting into Monday morning.

Cooler and what most people would appreciate as good old summer-like weather will move in for most of next week as high pressure builds in, bringing mostly sunny skies along with high temperatures in the low to mid-20s. Right now it’s looking like pretty much all of the active weather should stay to our south for the first half of next week, before the upper ridge begins to build northwards once again late next week.

This building ridge will push high temperatures back towards the 30 C mark, along with a return to more unsettled conditions.

Usual temperature range for this period

Highs: 23 to 31 C Lows: 10 to 18 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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