Tropical Cyclone Formation Alert
Typhoon Wayne originated from an elongated surface trough west of Truk. Initially, the trough was poorly organized, but after 1200 UTC on July 21, satellite imagery indicated an increase in the organization and convective activity of the system. Based on this, a Tropical Cyclone Formation Alert (TCFA) was issued late on July 21 by the Joint Typhoon Warning Center (JTWC). Early the next day, Hurricane Hunters estimated that the system developed into a tropical depression, and the JTWC subsequently initialized warnings. Around this time, the Japan Meteorological Agency (JMA) started monitoring the system.