National Weather Service United States Department of Commerce

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Multiple rounds of showers and storms moving through the region overnight tonight will bring heavy rainfall. This may produce areas of flooding or flash flooding, especially in areas where storms move over repeatedly. If you live in a flood prone area, have a plan in place now in case of overnight flooding.
Thunderstorms will move into the region this evening and continue overnight. Severe storms are possible. Damaging wind is the main threat, though large hail and a few tornadoes cannot be ruled out. These storms will be capable of producing heavy downpours, and could result in localized flash flooding.