A medium-size but powerful typhoon is moving north over the Pacific just south of the Okinawa island chain, and the Meteorology Agency has warned that it may approach the prefecture's main island early August 7.

Typhoon No. 11, with a central pressure at 965 hectopascals, is tracking the Earth at 20 km and is packing winds of 126 kph, the agency said. The typhoon is expected to move to waters southeast of Miyako Island in Okinawa Prefecture this morning, it said.