Yes, that’s as scary as it sounds. The accumulated cyclone energy (or ACE) is a measurement of the combined wind energy a storm has during a set time period. Irma has now broken the 24-hour ACE record, previously held by Hurricane Allen back in 1980. Irma is now a Category 5 hurricane and its winds could cause virtually unparalleled damage over the course of its path.
— Philip Klotzbach (@philklotzbach) September 6, 2017