Storm Warning

It is a quiet summer afternoon. It is warm and sunny, but gradually the sunshine fades. Towering, threatening clouds grow high into the sky. Soon it is dark as night. Lightning flashes around the sky. Torrential rain thrashes down. Hailstones the size of golf balls crash to the ground. A spinning funnel of air drops from the clouds. It reaches down and touches the ground. A twister is on the way...