News Hurricane Isaias forecast to become 90 mph storm; hurricane watch issued for Florida’s east coast July 31, 2020July 31, 2020 Cheryl McCloud and Doyle Rice, USA TODAY NETWORK Comments Off on Hurricane Isaias forecast to become 90 mph storm; hurricane watch issued for Florida’s east coast Hurricane Isaias may strengthen to a Category 2. Tropical storm conditions are likely in Miami on Friday night or early Saturday morning.