Summer's Over?

We are about to flip to the other side of August and weather wise this means changes. Now, it's not as if fall is going come in on the 16th of the month, but daylight is rapidly diminishing and this will have profound affects on our weather. In northern Canada there is a small town called Resolute. Since May, Resolute has enjoyed 24 hours of daylight. In the next 15 days they will lose over 7 hours of that light and by mid-September sunrise and sunset will grow closer together for a loss of another 5 hours. The loss of the sun means temperatures will cool there as well as across the rest of the northern parts of our hemisphere. I am fascinated by Resolute. Temperatures today are in the 30s with periods of cold and snow. Although it may still warm into the 40s this month, the temperature trend is heading lower. You might ask, what the heck does that have to do with us? As colder air builds to the north it will be help to push the jet stream further south. As the jet stream moves south, our air cools, we lose humidity and we generally get a bit stormier. It takes, depending on the year, about 8 to 10 weeks for that jet stream to move more permanently into our area. Once that happens fall and even winter arrive. Last year, the jet stream rarely moved south but this winter I expect that to not be the case. More on the winter forecast in the next couple of weeks.

http://www.boston.com/news/weather/weather_wisdom/2012/08/the_weather_this_weekend.html