MANILA (UPDATED) — The low pressure area off northern Luzon developed into tropical depression Domeng on Thursday afternoon, said state weather bureau PAGASA.
Domeng was spotted 930 kilometers east of extreme northern Luzon at 3 p.m. It was packing maximum sustained winds of 45 kilometers per hour near the center and up to 55 kph gusts, PAGASA said in its 5 p.m. bulletin.
It said that the monsoon trough and the southwest monsoon enhanced by Domeng and Tropical Storm Chaba (formerly Caloy) will bring monsoon rains over the western sections of Central and Southern Luzon.
PAGASA warned that Domeng and the enhanced southwest monsoon will bring moderate to rough seas reaching 2.1 to 4 meters over the seaboards of northern Luzon and the western seaboards of Central and Southern Luzon.
"These conditions may be risky for those using small seacrafts. Mariners are advised to take precautionary measures when venturing out to sea and, if possible, avoid navigating in these conditions," it said.
PAGASA said it is "likely" that the agency will release a gale warning over the western seaboard of Luzon Thursday night.
Domeng, the fourth cyclone to have entered the PAR this year, is forecast to reach the tropical storm category in the next 24 hours. Peak intensity of around 85 kilometers per hour may be reached by Saturday, PAGASA said.
Outside the PAR region, PAGASA said Domeng is forecast to pass "very close or make landfall" in the vicinity of the Ryukyu Islands on Saturday evening or Sunday morning.
Domeng is also forecast to gradually accelerate north-northwestward over the next 3 days and remain far from the Philippine landmass, according to PAGASA.
It may exit the PAR on Saturday morning or afternoon, said the weather agency.