Issued: Monday, March 9, 2009 Covering: March 11 –March 18

We are starting off this forecast period a little on the cold side. This cold air has arrived compliments of yet another ridge of arctic high pressure. While we may not like the cold, this area of high pressure has kept a significant winter storm to our south.

March tends to be one of the stormier months as the weather pattern begins to transition from winter to spring. Thanks to this large area of high pressure, this forecast period looks to be pretty quiet, with plenty of sunshine and slowly warming temperatures.

The core of the arctic high will be over our region on Tuesday and Wednesday and this is when we will see our coldest temperatures. While it doesn’t look like we will see any record-breaking cold temperatures, we will be colder than the usual temperature range for this time of the year – so this is definitely some abnormally cold air.

During the second half of this week the arctic high will slide off to our southeast and we will begin to see a return flow of warmer air. Temperatures by Saturday should be pushing the 0C mark for highs. The models then show a weak area of low pressure moving through our region, bringing with it a chance of showers or flurries over southern regions and some light snow for central areas. This low is expected to continue to weaken as it passes through, so I don’t see any significant precipitation with it.

Behind this low we will once again see arctic high pressure build southward, but this time it doesn’t appear to be too strong. Temperatures will cool down a little bit on Monday and Tuesday, with highs around -10C. Looking beyond this period, the models show a more springlike pattern, with high temperatures on most days at or above 0C.

Usual temperature range for this period: Highs: -10 to +3C. Lows: -24 to -6C.

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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