MIAMI – On Monday, Tropical Storm Erin emerged in the eastern tropical Atlantic Ocean, just west of the Cabo Verde Islands, while Hurricane Henriette intensified in the Pacific Ocean, far from Hawaii, according to forecasters.

There were no coastal watches or warnings in effect for either storm, the Miami-based National Hurricane Center said.

Erin was located approximately 280 miles (451 kilometers) west-northwest of the Cabo Verde Islands, featuring maximum sustained winds of 45 mph (72 kph), as reported by the NHC. The storm was advancing westward at a speed of about 20 mph (32 kph).

Gradual strengthening was forecast over the next several days.

Hurricane Henriette was classified as a Category 1 storm on Monday. It had maximum sustained winds of 85 mph (137 kph), according to the NHC, and was positioned about 525 miles (845 kilometers) northwest of Honolulu.

Additional strengthening was possible Monday, with weakening over the next few days.

In the Pacific, the remnants of what was once Tropical Storm Ivo deteriorated on Monday, as noted by the NHC. These remnants were located around 615 miles (990 kilometers) west of the southern tip of the Baja California peninsula of Mexico, posing no threat to land.