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Arctic high pressure continues to dominate

Issued: Tuesday, Feb. 17, 2015 – Covering: Feb. 18 – Feb. 25, 2015

Our weather over the last week was dominated by arctic high pressure as predicted, but those highs didn’t track quite the way the weather models indicated they would, resulting in only a mediocre forecast. This issue’s forecast begins where last week’s left off — with cold arctic high pressure dominating.

The first and strongest of what looks to be a series of three arctic highs will slide across the Prairies Wednesday and Thursday, bringing sunny skies and cold temperatures. Temperatures will definitely run at or even slightly below the bottom end of the usual temperature range. Once this high slides off to the southeast Friday, we should see a little milder air work its way in as our winds become southerly on the backside of the high.

A second and slightly weaker arctic high is then forecast to drop southward over the weekend. This will keep our skies mostly clear, but even with the strengthening late-winter sunshine, daytime highs will still be near the low end of the usual temperature range. This high, like all the others, is then forecast to slide to the southeast. This should result in a westerly flow developing across the Prairies late Sunday, lasting into the early part of next week. Temperatures under this westerly flow should moderate toward the middle of the usual temperature range, and we could see a few more clouds.

A third and hopefully final arctic high is then forecast to work southward around the middle to latter half of next week, bringing with it another shot of cold air. Looking beyond this period, there are some hints that the cold pattern we’ve been in over the last couple of weeks will start to change toward a warmer but stormier pattern. After all, we are heading toward March, which can be the snowiest month of the winter!

Usual temperature range for this period: Highs, -16 to -1 C; lows, -29 to -10 C.

About the author

Co-operator contributor

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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