sentences:  On 10 February, the Tropical Cyclone Warning Centre (TCWC) in Perth identified a Tropical Low near 16.0°S and 124.7°E, and began issuing tropical cyclone advisories on the system.On 12 February, the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert on the developing system.Later in the day, the JTWC issued its first advisory, designating it as Tropical Cyclone 19S.