It basically becomes a dam, and water can flood behind it very, very quickly,” said Maureen Hastings, a lead meteorologist at the NWS. “So it's very chaotic and very hard to predict.” ...

Each winter, Vermont prepares for potential ice jams and their impacts. Also known as “ice dams,” ice jams form when blocks of ice clump and block river flow.

You’re in the middle of a winter storm and you notice water dripping from the ceiling and icicles forming behind your gutters. The culprit is an ice dam, a phenomenon that happens when melting snow ...