A van in a sinkhole in Winter Springs, Fla., Monday, after Hurricane Irma. Hurricane Irma was a powerful, sprawling storm that decimated parts of the Caribbean and as a weaker tropical storm, it continues to inundate northern Florida and the South Carolina coast. Photos: NASA/NOAABut after nicking the coast of Cuba Friday, the hurricane winds slowed and Irma was downgraded to Category 4. “Think of the hurricane as a cork in a stream and the river around it moves the cork,” Mr. Tang said. It’s the reason an ice skater draws in her arms, Mr. Tang said, to spin faster and more stably.

Source: Wall Street Journal September 11, 2017 18:22 UTC