Yagi strengthened briefly into a super typhoon overnight Thursday before weakening Friday but picking up forward speed as it tracked northwest toward the Tokyo area.
Meanwhile, 7th Fleet assets set sail from Yokosuka Naval Base as a precaution, though the storm didn’t appear to be a threat to land.
Tropical Cyclone Condition of Readiness Storm Watch was declared at 7 p.m. Friday at Yokosuka as Yagi swirled east of Iwo Jima, hurtling northwest at 14 mph and packing Category 5 hurricane-equivalent sustained winds of 138 mph and 167 mph gusts.
But Yagi was forecast to curve sharply northeast and churn well east of Tokyo.
Forecast closest point of approach to Yokosuka is 285 miles southeast at 4 a.m. Sunday.
A base spokesman said Yokosuka should feel little of Yagi’s Category 2 sustained winds of 100 mph and 127 mph gusts at its center.
“We’re not looking for anything terrible,” said Fleet Activities Yokosuka spokesman Phil Molter.
Earlier Friday, CFAY issued TCCOR 3 before reverting to Storm Watch.
Any episodes of high winds at Yokosuka on Sunday would last for a “very short period,” Molter said, and staying in TCCOR Storm Watch was a “precaution until the storm passes.”
A handful of 7th Fleet vessels pulled out to sea starting Friday afternoon.
Destroyer Squadron 15 ships, including the destroyers USS John S. McCain and Fitzgerald and the guided missile frigate USS Gary, began the pullout at 1 p.m. Friday, Molter said.
Officials were waiting to see what Yagi might do before deciding to send the aircraft carrier USS Kitty Hawk or the 7th Fleet flagship USS Blue Ridge out of port.
Further inland, Yokota Air Base remained in TCCOR 4 Friday evening. Capt. Warren Comer, 374th Airlift Wing spokesman, said the base was bracing for wind gusts of up to 35 mph on Sunday afternoon, with 1½ inches of rain.
Yagi is forecast to pass 315 miles southeast of Yokota at 4 a.m. Sunday.
Once past Yokosuka and the Tokyo-Kanto Plain area, Yagi is forecast to track rapidly east-northeast before gradually dissipating in the north Pacific, according to the Joint Typhoon Warning Center.