A severe thunderstorm watch is in effect for some North Texas counties Friday morning. The National Weather Service issued the watch for Jack, Wise, Cooke, Grayson and Fannin counties until 10 a.m. All of North Texas is under a slight risk for severe storms on Friday.

The National Weather Service said storms would most likely develop after 3 a.m. and through the morning commute. The agency’s forecasters said the main threats are large hail and damaging wind, and there’s also a low tornado threat.

Wednesday night into Thursday morning, the severe storm threats the First Alert Weather team has been watching in North Texas begin to move through the area.

Drenching rain along the Texas-Mexico border has let up but rescues are still ongoing after severe storms trapped residents in their homes, forced drivers to abandon their vehicles on flooded roads and shut down an airport.

The National Weather Service warned on Thursday of "generational" floods in the U.S. South and Midwest as storms ripped across a swath of the country from Texas to Michigan, whipping up tornadoes and killing two people.

Violent storms cut through a wide swath of the South and Midwest, spawning tornadoes and killing at least two people, knocking down power lines and trees and ripping roofs off homes.