 It's Mr. Wash Wednesdays. Get your car washed today. Now open in Tyson's Corner, Mr. Wash, the official car wash of the WTOP News Vehicle Fleet. Bob Imler, WTOP Traffic. Now we're going to WTOP Meteorologist Mike Stenford. Cold front coming into the region. We've got a warm and unstable air mass covering the entire area. And that means more thunderstorms in the next several hours ending after midnight. Some of these storms could be severe. Looks like damaging winds the main threat. Our lowest upper 60.