Under the current forecast track, Hector is expected to pass south of the Big Island of Hawaii late Wednesday or Wednesday night.
Hector has entered the Central Pacific as a Category 4 Hurricane on the Saffir-Simpson scale, with increased forward movement near 15 miles per hour and maximum sustained winds are near 140 miles per hour.
It was uncertain if it would hit or just brush by the southern edge of the Big Island, said a meteorologist at the National Weather Service's Weather Prediction Center in College Park Maryland. The storm could make a direct hit near Hawaii's Kilauea volcano, which has been spewing lava and molten rock since it erupted May 3. The Big Island has been coping with three months of Kilauea's volcanic eruptions that have sent lava flowing into some neighborhoods.
According to geologist Janet Babb, of the US Geological Survey, that surpassed eruptions from the lower zone of several weeks and 88 days recorded in 1840 and 1955 respectively.
On Friday, state officials warned residents and visitors to take precautions in case Hector gets closer to the island chain.
Hurricane Hector updated satellite imagery as of 11 p.m. on Sunday, Aug. 5, 2018.
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Hurricane Hector is gaining strength as it barrels through the Pacific - and could make landfall in Hawaii by the middle of the week.
Some fluctuations in intensity are expected overnight into Monday, followed by gradual weakening Monday night through Wednesday.
Meanwhile, forecasters also have their eyes on two Tropical Storms in the Eastern Pacific.
That would put the storm on a virtual collision course with Kilauea Volcano, situated on the southern portion of the island.
A tropical storm watch is in effect Monday for waters south of the Big Island.