The second named storm of the Pacific’s tropical cyclone season has strengthened into Tropical Storm Yutu, but officials with Kadena Air Base’s 18th Weather Flight on Okinawa said they don’t expect it to become a threat to major U.S. bases in the region.

Joint Typhoon Warning Center advisories projected Yutu to reach typhoon strength early Saturday morning.

It will continue to move northwest, but will get only as close as 460 miles southeast of Okinawa, then shift to the northeast, 18th Weather Flight forecaster Staff Sgt. Kyna Davis said Friday.

Yutu is forecast to pass almost directly over Iwo Jima on Tuesday, packing sustained 58 mph winds and 72 mph gusts at 1 a.m. Tuesday.

At noon Friday, Yutu was 680 miles west of Guam, moving northwest at 20 mph with sustained winds of 69 mph and gusts of up to 86 mph at its center.

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