Erin roared from a Category 1 to an extremely powerful Category 5 overnight, now packing 160 mph winds with a recon-measured central pressure near 917 mb while

Typically, they move about 1 to 2 feet per second, but they could move as fast as 8 feet per second, or 5.5 mph, beyond any Olympic swimmer’s pace. They’re usually no wider than 80 feet.