This episode visits a town in South Carolina where it's raining popcorn snow: little balls of ice called graupel that look harmless but that could trigger avalanches.

How weird weather is making Florida the sinkhole capital of the world. Plus, red rain in Sri Lanka and India, underwater clouds, snow rollers, sprouting ice and more.

This episode features exploding icebergs in Antarctica, snow in Saudi Arabia, deadly sea foam in America, a perfect full circle rainbow, a lake that drains then mysteriously re-fills, and more.

Why is a lake in Canada coming out in spots? Plus: singing sand dunes, rare gravity waves, a pillar of ice sprouting from an English birdbath, and more.