sentences:  Ophelia continued on a general south-westerly track parallel to the coast, and eventually weakened out to sea as TCWC Perth discontinued advisories.Early on 28 February, Tropical Cyclone Warning Center Brisbane identified a Tropical low which was located about north-east of Townsville, Queensland and started issuing Gale Warnings on the low Later that day the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert on this tropical low which was located north-east of Australia.The next day, the JTWC issued its first advisory on the Tropical Low designating it as Tropical Cyclone 20P.