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Temperatures on a roller-coaster

Weather forecast for week of Nov. 25, 2013

The weather looks to be settling into a bit more of a predictable pattern. Last week’s forecast was pretty good, with most systems moving and behaving as forecasted by the weather models.

For this forecast period it looks like our current up-and-down pattern will continue. The weather models show us in a predominantly northwesterly flow for most of this forecast interval. With this flow we’ll see weak areas of low pressure ripple down from the northwest every couple of days. As each of these systems drop southeastward, we’ll see some warmer air try to move in before a reinforcing shot of cold air drops southward behind the low.

Each of these lows will only bring a slight chance for snow, with maybe only a quick shot of one or two centimetres. The best chance for measurable snow will come with a system expected on Thursday or Friday. It doesn’t look like we’ll see a return to really cold temperatures during this forecast period, with highs on most days expected to be around -8 C and overnight lows around -14 C, depending on cloud cover.

Looking further ahead, the weather models show a significant storm system coming in off the Pacific and bringing some heavy snows to the Prairies around the middle of next week. There is not a lot of confidence in this part of the forecast, though, especially when it comes to the exact track of this system, but it is something to keep an eye on. The models are in good agreement with bringing some of the coldest weather so far this winter in behind this system, as a large arctic high builds south. As usual, we’ll have to wait and see just what unfolds.

Usual temperature range for this period: Highs, -15 to 0 C; lows, -25 to -8 C.

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