熱帶氣旋形成警報
A tropical disturbance formed east of Chuuk on July 31 and gradually increased in organization over the next several days as it moved northwestward. The Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert on the system on August 4 and it was designated a tropical depression by both the JTWC and the Japan Meteorological Agency (JMA) later that day. The depression strengthened into a tropical storm on August 5, and the JMA designated it Tropical Storm Saomai.