An unprecedented series of violent tornadoes is sweeping across Oklahoma. Tornado chasers, headed by Dr. Jo Harding, attempt to release a groundbreaking device that will allow them to track them and create a more advanced warning system. They are joined by Jo's soon to be ex-husband Bill, a former tornado chaser himself, and his girlfriend Melissa.

• Warner Bros. Pictures
• Universal Pictures
• Helen Hunt
• Bill Paxton
• Jami Gertz
• Cary Elwes
• Lois Smith
• Philip Seymour Hoffman
• Alan Ruck
• Sean Whalen