Rounds of potent thunderstorms are expected to wallop the central and eastern U.S. this weekend, unloading hail, high winds, flash floods and possible tornadoes over a vast swath of the country.

The multi-day severe weather threat has already led to deadly flooding in Texas and damaging tornadoes in Illinois and Iowa. In the Dallas metro area, one man was pronounced dead this week after he was found trapped in his vehicle by rising floodwaters, according to the Dallas Fire-Rescue Department.

On June 5, flood watches remained active across parts of Kansas, Missouri, Oklahoma, Texas and Arkansas, according to the National Weather Service. Officials in multiple states warned residents not to drive through flooded roads and to stay updated with the latest forecasts.

Fueling the severe weather outlook is the clashing of warm air from the Gulf with cool air coming off the Rocky Mountains, according to AccuWeather. The storms' impact is likely to be felt from the Gulf Coast to the Great Lakes and parts of the Northeast, including Maine and New York.

On June 5, an area from eastern New Mexico to western Texas and portions of southeastern Colorado is at risk of high, damaging wind gusts and possible tornadoes, forecasters said.