Typhoon Bebinca is forecast to approach Japan's southern island of Okinawa over the weekend, the Japan Meteorological Agency said Wednesday.A tropical cyclone around the Mariana Islands evolved into the season's 13th typhoon on Tuesday.As of 3 p.m., it was moving northwestward at a speed of 20 kilometers per hour near the islands, packing winds of up to 126 kph with an atmospheric pressure at 990 hectopascals at its center, the agency said.Related coverage:3,000-yr-old cedar toppled on typhoon-hit island in southwest JapanREAD FULL ARTICLE