Farther out in the Pacific was recently formed Tropical Storm Kristy, which had sustained winds of 50 miles per hour (85 kph) and could become a hurricane.
The storm was centered about 1,160 miles (1,870 kilometers) west of the Azores and was moving north near 16 mph (26 kph).
High rainfall from deep tropical moisture surrounding Hector is predicted to affect the Puna and Kau districts of the Big Island as the hurricane passes by south of the state.
According to the Central Pacific Hurricane Center, the center of the hurricane was located about 225 miles south-southeast of Hilo, or 400 miles southeast of Honolulu.
This email will be delivered to your inbox once a day in the morning. "There is a reasonable chance that Hector will survive to cross the International Date Line early next week", said AccuWeather meteorologist Steve Travis.
John was expected to strengthen rapidly and become a major hurricane by late Tuesday. It was likely to bring rain to the southern peninsula, as well as heavy surf.
Sub-tropical Storm Debby was heading north at 15mph on Tuesday evening, with maximum force winds of 40mph, but it is expected to dissipate before the week is out. All these conditions tend to be associated with quieter Atlantic hurricane season.
The risk of a hurricane striking the United States during the remainder of the summer is lower than average, experts said in an updated seasonal forecast released Thursday. Debby poses no threat to land, the hurricane center said.