 The WTOP Traffic Center, presented by Window Nation. Buy two windows, get two free. Visit windownation.com. I'm Rob Stallworth, WTOP Traffic. And here's 7 News First Alert meteorologist Brian Vandegraaff. Be prepared with your rain gear this week. We have off and on shower chances daily with some thunderstorms as well. If all works out, we could clear this out by Friday and the weekend. That'd be great.