TOKYO — Typhoon Melor spared Guam and Saipan its full wrath over the weekend, but could threaten the Kanto Plain area of Japan by mid-week.

The Joint Typhoon Warning Center forecasts Melor to curve sharply northeast at mid-morning Tuesday, skirting some 310 miles east of Okinawa and weaken as it heads toward cooler waters off mainland Japan.

It is forecast to track east of Tokyo, passing 55 miles southeast of Yokosuka Naval Base at 2 a.m. Thursday, packing sustained 80-mph winds and 100-mph gusts at its center.

Sunday morning Melor was a super typhoon spinning about 240 miles west-northwest of Saipan, packing sustained 167-mph winds and 200-mph gusts at its center — equal to a Category 5 hurricane in the Atlantic.

It is expected to pack sustained winds of 127 mph and 155-mph gusts when it turns toward the northeast on Tuesday.

National Weather Service officials on Guam reported gusts on the island of up to 38 mph and very little rain when Melor passed to the north overnight Saturday.

There were no immediate reports of damage at Air Force and Navy facilities on Guam.

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