I bought some white oak lumber three weeks ago. I've just started milling it for a project. I began with a piece 4/4 thick about
6 in. wide and 50 in. long. It was farily straight and flat. I cut it into two pieces each 3 in wide. I jointed one face and one edge so they were perfectly straight and flat. I then resawed it with my bandsaw to reduce the thickness to a little more than 3/4 in. But a minute later I noticed that the smooth, jointed face was badly bowed (convex)! I repeated the operation with the other 3 in. wide piece and the same thing happened.1) Why is this instant warping happening?
2) What can I do to avoid it? If this keeps happening I'll have to throw out all the wood I bought.A little more info: The wood was dry when I bought it and has remained dry while in my garage (3 weeks). My garage is dry and varies between 40 and 65 degrees F. I don't know how long since the wood was cut for lumber. I don't notice anything unusual about the wood. The jointed surfaces look very good.