Issued: Monday, November 30, 2009 Covering: December 2 –December 9

Another tough forecast this week, as an area of low pressure know as an Alberta Clipper will affect southern and possibly central Manitoba early this week. The exact track of this low and how intense it will be will have a significant impact on the weather for the rest of this forecast period.

If our region sees some significant snow from this system, we will experience some of the coldest temperatures so far this winter (if we can call it winter so far). If we miss out on the snow we will still see a cool-down, but it will not be that dramatic.

Once this low pushes through we will see a weak ridge of arctic high pressure building, but the low lingering to our east will keep some clouds over our region. Along with the mix of sun and clouds we will see near-seasonable temperatures – which will seem cold after the warm November weather. Over the weekend, the weather models are showing another Alberta clipper developing and pushing eastwards. Currently they show this low taking a more southerly route possibly bringing snow to extreme southwestern Manitoba and North Dakota.

Once this system pushes by, the models are hinting that we might see an arctic outbreak of some really cold air. They seem to be flip-flopping a little bit on this, but if we do see a strong push of arctic air we will see temperatures drop to the lower end of the usual temperature range for this time of the year by Monday or Tuesday of next week. It is possible that this cold snap will stick around for a while.

Usual temperature range for this period: Highs: -16 to -1C Lows: -26 to -10C

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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