Iselle strengthened into a hurricane in the Eastern Pacific and could bring more muggy weather and rains to Hawaii late next week.

Iselle was a category 1 hurricane with sustained winds of 75 mph at 5 p.m. Hawaii time.

The storm was 1,270 miles away from the southern tip of Baja, California in Mexico, moving west northwest at 12 mph.

The storm is expected to get stronger over the weekend, but will move into cooler waters and drier air and is likely to weaken back into a tropical storm when it enters the Central Pacific on Tuesday.

Meanwhile, what’s left of former Tropical Storm Genevieve will bring muggy weather and an increased chance of showers to Hawaii through Saturday, National Weather Service forecasters said.

The bulk of the stormy weather associated with Genevieve was about 550 miles south of Hawaii.

Tropical moisture from the northern edge of Genevieve will move over the state from east to west, bringing increased humidity and a chance of locally heavy rain.

Forecasters say flash floods are not likely, but are possible and flood advisories could be issued.

The muggy, rainy weather should peak Friday evening on the Big Island and windward Maui, and spread westward to Oahu and Kauai Friday night.

"The majority of rainfall will occur over the windward slopes but leeward locations will get a fair amount of showers as well," forecasters said.

The skies should clear by Sunday.

Forecasters expect 1 to 3 inches of rain or more in windward areas of the Big Island through Saturday. Windward areas of other islands may get between a half inch to 2 inches of rain. Leeward areas will generally see less than a half inch of rain.

The forecast for Honolulu and southern Oahu Friday calls for a 50 percent chance of rain Friday night, with a chance of locally heavy rain. There’s a 70 percent chance of rain on Saturday, when mostly cloudy skies and showers are expected in the morning, with scattered showers in the afternoon.