First freezes, snowflakes possible in the East late in the week

Despite one of the warmest starts to autumn on record, the coldest air of the season could plunge into the East in the week ahead. That could bring some first freezes of the fall to parts of the mid-Atlantic, Ohio Valley, even the Southeast. It could even be cold enough for some first snowflakes of the season near the Great Lakes snowbelts and Appalachians. Here's our latest in-depth look at what could happen.