At least four areas in Northern Luzon were placed under storm signals as Tropical Depression Nando (international codename Kong-Rey) intensified into a storm Monday afternoon, a state weather forecaster said.
PAGASA forecaster Chris Perez said their models show Nando may exit the Philippine Area of Responsibility (PAR) Thursday afternoon.
"Nag-intensify into a tropical storm si Nando," Perez told a media briefing, parts of which were aired on dzBB radio.
"Sa tatlong araw inaasahan po natin [na] nasa loob [ito] ng PAR. Lalabas ito ng PAR sa Huwebes ng hapon," he added.
Also, Perez said they are monitoring a low-pressure area in the West Philippine Sea, which may bring rain over the area.
He said that as of 4 p.m. Monday, Nando was estimated at 270 km east of Casiguran in Aurora, packing maximum winds of 65 kph near the center and gustiness of up to 80 kph. It was moving northwest at 15 kph, Perez added.
PAGASA's 5 p.m. advisory said Nando is expected to be 160 km southeast of Basco, Batanes Tuesday afternoon, and 160 km north of Basco, Batanes Wednesday afternoon.
By Thursday afternoon, it is expected to be 420 km north of Basco, Batanes or 20 km east of Northern Taiwan.
said the tropical storm was moving west-northwest.
Perez said Nando may bring rainfall of 10 to 20 mm (heavy to intense) within its 400-km diameter.
Areas under Storm Signal No. 1 include Batanes; Cagayan including the Calayan and Babuyan Islands; Apayao; and Isabela.
PAGASA said Nando is expected to enhance the southwest monsoon, which will bring "light to occasionally heavy rains and thunderstorms Metro Manila and the rest of Southern Luzon."
"Sea travel is risky over the eastern seaboard of Central and Southern Luzon," it said.
Also in its 5 p.m. bulletin, PAGASA said Isabela, Apayao and Cagayan, including Batanes, Babuyan and Calayan islands, will have rains with gusty winds with moderate to rough seas.
The Bicol Region, Mimaropa and Aurora will experience "cloudy skies with moderate to occasionally heavy rainshowers and thunderstorms which may trigger flash floods and landslides."
"Metro Manila and the rest of Luzon will have cloudy skies with light to moderate rainshowers and thunderstorms," it added.
Visayas and Mindanao, meanwhile, will be partly cloudy to cloudy with isolated rainshowers or thunderstorms, PAGASA said.
Also, moderate to strong winds from the southwest to west will prevail over Luzon, Visayas and Eastern Mindanao.
PAGASA said strong to gale-force winds associated with the southwest monsoon enhanced by Tropical Storm Nando may affect the eastern seaboards of Central and Southern Luzon.
— RSJ/TJD, GMA News