6:20 PM Update - Heavy showers and strong storms to affect parts of the DC region between 8PM and midnight

A band of heavy showers and strong thunderstorms is headed towards the District of Columbia from western Pennsylvania and West Virginia. This is the same complex that ripped through the Chicago area earlier today causing numerous power outages. While it is in a weakened state relative to earlier today, some of these storms can maintain severe levels as they reach the DC region later this evening. The greatest chance for heavy shower and strong storm activity will occur between 8PM and midnight.  Another brutally hot and humid day will follow on Tuesday.