Summerlike pattern could bring showers, thunderstorms to 40 states this week

A summerlike storm pattern is expected this week across much of the central and eastern U.S. This will likely fuel a daily threat of showers and thunderstorms that will typically form during the peak heating of the day and diminish after sunset. The pattern is being driven by a jet stream that is virtually locked in place, which will steer multiple storm systems across the central and eastern U.S.