How Fast Is Hailstone (large)?

Large hailstones fall at 160 km/h. The world record hailstone, found in South Dakota in 2010, was 20 cm across and weighed nearly 900 grams — like a melon falling at near-freeway speed.

The largest hailstones grow by being lifted up and down through thunderclouds repeatedly — adding a new ice layer with each cycle.

• Faster than a cheetah sprinting
• Record hailstone: 20 cm wide