Issued: Monday, November 2, 2009 Covering: October 4 –November 11

It is amazing sometimes how what appears to be a small change early in a weather pattern can lead to dramatic changes later. This is what happened last week. The forecasted storm that looked as it was going to usher in an early start to winter developed as expected and brought record snow to parts of Colorado, but it moved a little quicker than expected and travelled a little further east and that made all the difference.

The storm system was not able to tap into any real cold air, which meant that little if any snow fell in our region and the blast of cold air that was forecasted to move in during this week is staying well to our north.

The forecast for this forecast period is looking to be fairly mild with no big storm systems to worry about. We will be in a zonal flow of air meaning that the general flow of the atmosphere will be from west to east. With this type of flow we usually see near-average temperatures and little in the way of precipitation.

Late this week and into the weekend look to be the nicest with temperatures pushing the 10C mark for highs as our region comes under a ridge of high pressure. This ridge will break down over the weekend returning us back to a zonal flow for the first part of next week. Looking further ahead the models are showing relatively mild temperatures and no storm system at least until the middle of the month.

With winter typically starting in early November you can see that the usual temperature range changes quite dramatically from week to week and precipitation falling as rain is now the unusual event.

Usual temperature Range for this period: Highs: -2 to 7C Lows: -11 to -2C

Probability of precipitation falling as snow: 80 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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