Autumn Begins Tuesday & Right on Queue the Season’s First Autumn Cold Front

The weather pattern over the eastern U.S. the past week has been dominated by a cut-off low pressure system that has brought torrential rains to some in the South and Southeast. That system has now been lifted northward and has weekend and a second system is becoming the new player on the field. This system will also cut-off from the main upper-level flow over the Plains through much of this week. Behind and underneath this system can be found the season's first true Autumn air. For example, on Tuesday, much of the Plains and Southern Rockies will see afternoon temperatures that will be 10-20 degrees below normal! Some of you in the Southern Rockies will see morning low temps in the 20s!

The system will slowly move east through Friday and then it will be picked up by the main flow and drag a trough across much of the Eastern U.S. The air will modify, though, and just bring about seasonal temperatures. But this will set up the ability for additional fronts to drop southeastward out of western Canada next week and behind these fronts will be found some cool, Autumn air.

Now with the start of Autumn begins our look at the Fall Colors. Where are the tree's changing? Well, parts of New England are starting to see some color, mainly from western Maine into northeast New York. Some color is also being seen in Wisconsin, Michigan and Colorado. In fact, the Aspens should quickly shine "golden" during the next week or so.