Another round of heavy rain is expected across the Mid-Mississippi Valley over the next two days, which could spell trouble for areas prone to flooding.

Much of the region is now under a Flash Food Watch. Areas from eastern Oklahoma to the Great Lakes are expecting slow-moving thunderstorms which can dump several inches of rain in just a few hours.

The heaviest rain is expected across Oklahoma and Missouri on Wednesday as an area of low pressure passes through. The worst of the rain will follow this low pressure system into Illinois and Lower Michigan on Thursday.

To make matters worse, river levels are already above flood stage from previous rainfall from earlier in the month. The Illinois River, the Missouri River, and the Platte River are a few of the many rivers which are likely to see significant flooding. Many farms along these rivers have lost cropland due to the rising waters.

Story by AccuWeather.com Meteorologist Eric Wanenchak.