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.

Henriette regained tropical storm strength in the Pacific Ocean well east of Hawaii on Saturday, but forecasters said it was still not expected to pose a threat to land.

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