sentences:  However, this number was withdrawn in RSMC La Reunion's post–storm analysis.The JTWC issued a Tropical Cyclone Formation Alert (TCFA) on the developing system on 29 July, and initiated warnings on the tropical cyclone late that day, designating it as Tropical Cyclone 01S.However, by this time, the cyclone had crossed 90E and entered TCWC Perth's Area of Responsibility, which designated it as a Tropical Low and issued shipping warnings on the Tropical Low.