 The most intense and extensive monsoon trough since 1974 spawned a tropical depression on August 15 . It drifted to the southeast , relocating several times in its formative stages . On August 16 it was upgraded to Tropical Storm Vera , and operationally the storm was to continue eastward , continuing to relocate in the broad monsoon trough and becoming a storm again on August 17 after weakening . Post @-@ analysis by the Joint Typhoon Warning Center suggested that the first storm turned to the west and dissipated , and that a new , separate storm formed well to the east on August 17 . However , the Japan Meteorological Agency maintained the system as a single storm . 
