Millions of Americans across the country are on alert for a severe weather outbreak as violent, long-track tornadoes with damaging winds of up to 80 mph and large hail are expected across the Midwest and South with the cross-country storm moving east.

The main threat for severe weather is flooding, and a flood watch remains in effect. One to two inches of rain is expected, with localized areas of up to four inches. Areas that receive higher totals may experience flash flooding. Urban, low-lying, and poor drainage areas are the most likely areas to see flash flooding.