SIOUX CITY (KTIV) - This episode is about tornadoes. We will use dry ice and ... This allows a rotating wall cloud to form on the underside of a thunderstorm. Thunderstorm downdrafts help the ...

Here, our experts share 10 tornado safety tips to help families and communities should one occur. A massive tornado barreled down on 4-year-old Aria and her classmates in Moore, OK in 2013. Watch what ...