More heavy rain looks to be on the way for today and tonight. The National Weather Service in St. Louis has issued a Flash Flood Watch that remains in effect until 1 am Thursday morning. We are looking at showers and thunderstorms for today with a high of just 68 and showers and thunderstorms for tonight with a low of 63. The National Weather Service says thunderstorms will impact the area thru tonight, some of which may produce heavy rainfall. The NWS also adds that isolated severe thunderstorms are also possible this afternoon and early this evening across portions of southeast Missouri and southwest Illinois.