Mix of sun and scattered thundershowers

Issued: Monday, June 22, 2015 – Covering: June 24 – July 1, 2015

This weather graphic shows the global temperature anomalies since 1880 for the 12-month period of June to May. Red means global temperatures are above the average, with blue being below average. It’s quite evident from the graph that there has not been any slowdown for the warming that has occurred since around 1980.

This forecast period is starting off much like the last one. The general flow of the atmosphere is fairly zonal, which means a strong west-to-east flow. Sometimes it’s coming a little out of the northwest, which results in slightly cooler conditions, and sometimes it veers a little southwest, which means warmer weather. The trouble is, most of these systems are weak in this flow, which is typical for this time of year. This makes the timing of any individual system difficult to predict a day or two in advance, never mind a week ahead of time!

That said, here’s a rough idea of how the weather looks like it will play out over the next week or so. A weak system will track by to our south on Wednesday, bringing a few clouds, with the chance of showers and thunderstorms late Wednesday and into Thursday morning. High pressure will build in briefly on Friday before another weak system tracks through our region Saturday, bringing a mixed bag of sun and clouds along with more chances for showers and thundershowers. Temperatures during this period look to be on the warm side, with highs expected to be in the mid-20s and, in sunnier areas, some upper 20s.

Sunday to Tuesday looks to be fairly sunny and hot, as an upper ridge building to our west pushes eastward a little bit. Look for highs in the upper 20s to low 30s under plenty of sunshine. An area of low pressure is then forecast to track through north-central Manitoba on Wednesday, bringing with it a chance for a few scattered thundershowers. Cooler air will move in behind this system, with highs expected to drop back into the low to mid-20s to end the week.

Usual temperature range for this period: Highs, 21 to 29 C; lows, 8 to 16 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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