Here's proof of the cold weather that has gripped the eastern half of the US. The light blue areas on the map at left are freeze warnings for tonight. We've already experienced the cold for the last two nights. Last night was the coldest so far with a low of 23. I think we'll be lower tonight. Already, some damage has occurred to plants and trees that had already leafed out because of the last two weeks of warm weather. I'll take some photos tomorrow to post.