Issued: Monday, September 28, 2009 Covering: September 30 –October 7

All good things come to an end and the weather is no exception. Our incredible streak of summer weather in September has finally run out and it looks like fall is here to stay.

Last week’s forecast played out almost exactly as expected and we are now into a much more fall-like weather pattern. The big question for this forecast period will be how much precipitation we will see. The main weather maker for at least the first half of this forecast period will be a large area of low pressure forecasted to slowly track across the central U. S. The farther north this low tracks the better the chance of seeing some significant rain on Thursday and Friday of this week.

Once this low pushes by over the weekend we will see weak high pressure build in bringing a mix of sun and clouds with temperatures remaining on the cool side with highs struggling to make it into the low teens. We will also likely see some cool/ cold nights with a significant killing frost a good bet.

High pressure looks like it will stick around for the first half of next week. Under its influence, we should see temperatures moderate a little bit with high temperatures of around 15C expected on Tuesday and Wednesday. Beyond this period the models are pointing towards cooler conditions moving back in for the Thanksgiving long weekend. I guess we will just have to wait and see.

Usual temperature range for this period: Highs: 8 to 19C Lows: -2 to 7C

Probability of precipitation falling as snow: 10 per cent

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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