11. Guangdong has lifted its typhoon warning , said the man, who wouldn't give his name. 12. Hong Kong dropped its typhoon warning at midday Thursday, as the storm moved on. 13. The Joint Typhoon Warning Center also uses a scale similar to the Saffir-Simpson Hurricane Scale. 14. Storms were also tracked on an unofficial basis by the American-based Joint Typhoon Warning Center. 15. Joint Typhoon Warning Center designated the system as Tropical Cyclone 27S later on 27 April. 16. Around the same time, the Joint Typhoon Warning Center classified Herbie as Tropical Storm 21S. 17. The Joint Typhoon Warning Center estimated peak extratropical on July 16 and dissipated the next day. 18. Workers in Taiwan began a search-and-rescue mission for missing victims once the typhoon warning was lifted. 19. By the afternoon, Hope was declared extratropical and the Joint Typhoon Warning Center ceased following the system. 20. Names retired before the 2000 season were from name lists used by the Joint Typhoon Warning Center.
