At least 74 mph (119 km/h).
A tropical storm becomes a hurricane when sustained winds reach 74 mph
A tropical storm becomes a hurricane when its sustained winds reach or exceed 74 mph (119 km/h). This increase in wind speed marks the transition from a tropical storm to a hurricane on the Saffir-Simpson Hurricane Wind Scale.
A tropical storm becomes a hurricane when sustained winds reach 74 mph or more.
A tropical storm becomes a hurricane when its winds reach 74 mph.
A tropical cyclone officially becomes a hurricane when sustained winds reach 74 mph (119 km/h)
; Category One Hurricane: Winds 74-95 mph; Category Two Hurricane: Winds 96-110 mph; Category Three Hurricane: Winds 111-130 mph; Category Four Hurricane: Winds 131-155 mph; Category Five Hurricane: Winds greater than 155 mph
The worst winds in a hurricane is inside the eye of the hurricane.
The strongest winds of a hurricane are in the eye wall.
A tropical cyclone is classified as a hurricane once it reaches sustained wind speeds of 74 mph or higher. Before that, it is known as a tropical depression (winds less than 39 mph) and then a tropical storm (winds between 39-73 mph).
A hurricane will start as a Tropical Wave. It then becomes a Tropical Depression. A TD is given a number but not a name. Once the TD reaches 39 mile per hour winds its given a name and becomes a Tropical Storm. After reaching 74 mile per hour winds it becomes a hurricane.
The winds of a hurricane must be at least 119 km/h.
A tropical storm, which has maximum sustained winds of 39-73 mph. Below tropical storm intensity is a tropical depression, with winds of 38 mph or less.