Tropical Depressions 17W, 18W, # 1
12:50 p.m. Thursday, Sept. 22, Japan time: In a span of about 12 hours, two tropical depressions spawned in the northwest Pacific, neither of which appear to be a major typhoon-like threat to U.S. bases in Japan or Okinawa at present according to the Joint Typhoon Warning Center’s forecast tracks.
JTWC projects 17W to peak as a tropical storm, curve northeast and pass 29 miles northwest of Yokota Air Base at mid-afternoon Saturday with 40-mph sustained winds and 52-mph gusts at center, bringing a forecast of showers and gusty winds through the weekend.
Tropical Depression 18W spawned Thursday morning, and was about 760 miles southeast of Kadena Air Base at 9 a.m.. It was moving east at 7 mph, with 35-mph sustained winds and 46-mph gusts. JTWC forecasts it to do an about face and head directly west, away from Okinawa, toward Luzon in the northern Philippines as a tropical storm.