MANILA, Philippines – Signal No. 1 remains up over Kalayaan Islands, Palawan even after Typhoon "Tino" has left the country early Thursday morning, according to the Philippine Atmospheric Geophysical and Astronomical Services Administration (Pagasa). Pagasa Administrator Nathaniel Servando told The Manila Times that the agency has now trained its focus over the approaching weather disturbance - Tropical Storm Fung-Wong (international name) – at 1, 715 kilometers east of northeastern Mindanao but still outside the Philippine Area of Responsibility (PAR). Citing data and analysis, Servando said the tropical cyclone has been forecast to enter PAR either late Friday evening or early Saturday morning. Once inside the archipelago, the weather disturbance will be named "Uwan," the 21st storm to hit the country this year, the Pagasa chief said. Servando said the chance of landfall may be on Monday over Northern or Central Luzon, he said. “In terms of intensity, the tropical cyclone is forecast to rapidly intensify and may reach typhoon category on Friday and super typhoon category on Saturday,” Servando said. Wind signals may be hoisted over the eastern portion of Luzon and portions of Samar provinces as early as Friday evening or Saturday morning in anticipation of strong winds or higher associated, the national weather bureau said. Signal No. 5 will likely be the highest possible storm signal that would be hoisted within the forecast period, it added. Servando warned of potentially life-threatening stormy conditions, which may occur over Northern Luzon and portions of Central Luzon on Monday and Tuesday. “There is also a potential for high storm surge risk and related coastal flooding, especially in Northern Luzon and the east coast of Central Luzon,” he said. Storm surge warnings may be issued as early as Saturday, the Pagasa top official said.