Tornadoes leave their mark on seven states

At least 17 tornadoes were reported in seven states on Tuesday morning.

The hurricanes were reported in Iowa, Nebraska, Kansas, Oklahoma, Missouri, Tennessee and South Dakota.

The most devastating storm appears to have occurred in Barnsdall, Oklahoma, north of Tulsa, where extensive damage was reported. According to Osage County Sheriff Eddie Virden, one person was killed in Barnsdall.

Fifteen people were treated for injuries at Ascension St. John Jane Phillips Medical Center in Bartlesville, about 20 miles south of Barnsdall.

In addition to tornadoes, 4-inch hail, about the size of a softball, was also reported in Kansas.

A tornado warning was issued Tuesday morning for parts of Missouri – including St. Louis – and Illinois. This watch should last until 8 a.m. local time.

The tornado watch in Arkansas has also been extended to 5 a.m. local time.

NOAA’s Storm Prediction Center in Norman, Oklahoma, had issued the highest possible severe weather threat warning for multiple intense, widespread tornadoes Monday afternoon and evening.

ABC News’ Kenton Gewecke and Melissa Griffin contributed to this report.