CNN PRODUCER NOTE cinders23 photographed ice discs in Milwaukee, Wisconsin, on January 19. 'My first thought was that they looked like cracked open geodes with beautiful crystal interiors,' she said. She had no idea what they were and sent some photos to the local weatherman to find out. 'They form when very cold water is caught in a swirling motion, the water freezes into ice but, due to the circular motion and bumping into each other, they become rounded as they spin around,' she explained.
- Jareen, CNN iReport producer