Soaking rain will affect a large portion of the country's midsection on Tuesday. The heaviest rainfall is likely across Texas, Arkansas and northern Louisiana. Slow-moving thunderstorms will dump tremendous amounts of rain in a short amount of time, resulting in flash flooding. Rainfall amounts of up to 4 inches are possible where these storms develop.

Farther north, the frontal boundary will also produce a soaking rainfall across the Ohio Valley and eastern Great Lakes. Up to 2 inches of rain can fall across Illinois, Indiana and Ohio. While the rainfall amounts may not be quite as excessive as what occurs in the South, there can be flooding in low-lying and poor drainage areas due to the slow movement of the rain.

Story by AccuWeather.com Meteorologist Eric Wanenchak.