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Issued: Monday, January 25, 2010 Covering: January 27 –February 3

The large storm system that affected a large portion of central North America over the weekend and into the first part of this week is going to continue to control our weather over the next five to 10 days.

As this low pushes to the northeast it will become stationary north of Hudson Bay. This will help to create/intensify what is known as the arctic vortex which is a large area of cold low pressure extending well up into the atmosphere. This will keep our region in a cold northerly flow for this whole forecast period.

The coldest day looks like it will be on Friday of this week as arctic high pressure will be directly over us. Look for overnight lows to be in pushing -30C. We should then see a little moderation of temperatures over the weekend along with the chance of some light snow as an area of low pressure pushes through southern regions bringing a couple centimetres of snow late on Sunday and early Monday.

Behind this low we will see another arctic high build southwards during the middle of next week bringing more cold air. By Thursday the models are showing some very cold air just to our northeast so depending on just how things set up we could see temperatures drop into the bottom end of the usual temperature range for this time of the year.

Looking further ahead the models are pointing towards a return to milder conditions by the end of next week.

Usual temperature range for this period: Highs: -22 to -5C Lows: -33 to -15C

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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