Showers and thunderstorms, some containing very heavy or torrential rainfall, will increase later today. Additional rounds of heavy rain will continue through Wednesday night across most of North Texas. The National Weather Service issued a Flash Flood Watch north of Interstate 20 for our Red River counties through Wednesday night. Rainfall amounts of 4 to 6 inches will be possible with isolated more massive quantities. Instances of flash flooding will likely occur, especially areas that have seen localized heavier rainfall in recent days.