Why the cool down?

With over 20mm of rain, hail, wind speeds fast enough to take out a hydro pole (and leave over 9,000 folks without power), a funnel cloud sighting near the 7A exit on the 115 and a confirmed F1 tornado north of Bowmanville...this has been a busy week weatherwise. But even with all of that activity, what people are talking most about this week is the cold. As that area of low pressure continues to spin NE of us it is "pulling" some very cool air into the region from the north. Low pressure centers (or mid-latitude cyclones) are identified by their counterclockwise wind direction. When you are to the west of a "Low" you can expect a northerly flow wind and that is why we're experiencing a cool down. (Just check out the pic above). Today's high was only 9 degrees, tonight's low is only 3 degrees, the high tomorrow will be similar to today and tomorrow night...um...well we expect a low of around the freezing mark. But hey...wearing a scarf is very fashionable.