Tropical Storm Henriette rapidly strengthened into a hurricane Sunday in the central Pacific Ocean with further strengthening expected, but it poses no threat to land, the National Hurricane Center said.

Hurricane Henriette was a Category 1 storm on Monday and was well away from Hawaiʻi. The storm had maximum sustained winds of 85 mph and was about 525 miles northwest of Honolulu.

Forecasters say Tropical Storm Erin has formed in the eastern tropical Atlantic Ocean as Hurricane Henriette is strengthening in the Pacific Ocean.