Severe thunderstorms, baseball-sized hail, flooding and possibly tornadoes may sweep across parts of Oklahoma, Missouri and Arkansas today, according to the U.S. Storm Prediction Center. There’s a 45 percent chance of storms producing damaging hail from Fort Sill, Oklahoma, to near Joplin, Missouri, and Fayetteville, Arkansas, the center said. Central Oklahoma, including Moore, where 24 people were killed by an EF-5 tornado last week, has the highest odds of twisters touching down today.