OKLAHOMA CITY (AP) — A tornado watch was issued Saturday in parts of four states as a strong storm system moved into the South and Plains states.

The watch was in effect until 6 p.m. in most of Arkansas and in northeastern Texas, southeastern Oklahoma and northeastern Louisiana.

The weather service said the system was also capable of producing wind gusts of up to 75 mph (120 kilometers per hour) and hail up to 2 inches (5 centimeters) in diameter, or about the size of an egg. Heavy rain and flooding is also possible.

Missouri Gov. Eric Greitens signed an executive order Saturday declaring...