About 1,000 miles east of Madeline is Hurricane Lester, moving at a slightly faster pace and also carrying Category 3 winds. Lester is expected to pass north of Hawaii, though it should still be close enough to bring rain and winds to the islands not long after Madeline passes. Additionally, its course will bring its waves and winds to more of the islands than Hurricane Madeline will.
Much of this is unprecedented. Hurricanes near Hawaii are rare, with conditions that facilitate their development tending to take place much further south. That makes two at once even more noteworthy. It's made possible, according to Weather Underground's Jeff Masters, by a combination of ocean temperatures two to three degrees warmer than usual and favorable atmospheric conditions.
Hawaii county is under a Hurricane warning, but Masters offers a little hope in that Lester is catching Madeline and that may produce something known as the Fujiwhara effect. It happens when two hurricanes get close enough to each other that the winds begin to impact one another, which would push Madeline further south and Lester further north, an ideal situation for residents of Hawaii.