WDEF-TV News 12 Tennessee River Valley weather forecast Overnight: Partly cloudy, humid, mild. Patchy fog. Scattered thunderstorms. Lows: mid 60’s. Winds: near calm. Wednesday: Mostly cloudy, warm, humid. Scattered mainly afternoon thunderstorms. Highs: low 80’s. Winds: ESE @ 5 MPH. Overnight: Partly cloudy, humid, mild. Patchy fog. Scattered thunderstorms. Lows: mid 60’s. Winds: near calm. Thursday: Mostly cloudy, warm, humid....