After an afternoon filled with tornado sirens, lightning strikes, torrential rain and visible cloud rotation near Iowa Speedway, IndyCar canceled Friday afternoon practice.

A tornado warning for southeastern Guthrie County was allowed to expire as planned for 12:15 a.m. Friday. According to the National Weather Service, a severe thunderstorm capable of producing a tornado was located near Casey at 11:45 p.m., moving east at 35 mph.

Due to the storm's huge hail, severe gusts, and frequent cloud-to-ground lightning, the weather service urges people to seek refuge in an inside room on the lowest floor of a building for their own sa

Having reliable, loud, and timely emergency alerts on your phone or device is important because when severe weather strikes, every second counts.

A tornado warning is in effect until 9:15 p.m. in New Castle County, Delaware.

Intense warnings issued in D.C. and surrounding counties threaten power and safety. Stay informed with the latest updates.

The National Weather Service released a severe thunderstorm warning at 3:09 p.m. on Wednesday in effect until 4:15 p.m. for Colbert, Franklin, Lauderdale and Lawrence counties.

Brigantine in Atlantic County, and Tuckerton and the Mystic Island section of Little Egg Harbor are in the path of this possible event.