MANILA — Typhoon Uwan (international name: Fung-wong) weakened further early Monday as it moved over the coastal waters of Bacnotan, La Union, according to the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA).

In its 5 a.m. tropical cyclone bulletin, PAGASA said the center of the typhoon’s eye was estimated over the coastal waters of Bacnotan, La Union, with maximum sustained winds of 150 kilometers per hour near the center, gustiness of up to 230 km/h, and central pressure of 955 hPa. It is moving west northwestward at 25 km/h.

PAGASA said strong to typhoon-force winds extend outward up to 780 kilometers from the center.

Tropical Cyclone Wind Signal (TCWS) No. 4 remains in effect over La Union, Pangasinan, Benguet, Ilocos Sur, parts of Nueva Vizcaya, Ifugao, Abra, Mountain Province, Nueva Ecija, Tarlac, Zambales, and nearby provinces, where typhoon-force winds of 118 to 184 km/h may pose a “significant to severe threat to life and property.”

Meanwhile, areas under Signal No. 3, including parts of Cagayan, Isabela, Apayao, Kalinga, Quirino, Aurora, Pampanga, Bulacan, Bataan, and northern portions of Zambales, may experience storm-force winds.

Metro Manila, CALABARZON, Quezon, and portions of MIMAROPA remain under Signal No. 2 due to gale-force winds, while parts of Bicol, Visayas, and northern Palawan are under Signal No. 1 for strong winds.

PAGASA warned of a high risk of life-threatening and damaging storm surge exceeding three meters within the next 24 hours over low-lying or exposed coastal communities in Ilocos Region, Cagayan Valley, Central Luzon, Metro Manila, CALABARZON, MIMAROPA, and parts of Bicol and Western Visayas.

A Gale Warning is in effect over the seaboards of Luzon and the western seaboard of Western Visayas, with sea conditions reaching up to 12 meters along the seaboard of La Union and the northern coast of Pangasinan.

The state weather bureau advised mariners to remain in port or seek shelter until conditions improve.

PAGASA said Uwan is expected to continue moving west northwestward in the next 12 hours before re-intensifying as it moves northwest to northward over the West Philippine Sea between Tuesday and Wednesday. It is forecast to make landfall over western Taiwan by Thursday, November 13.

The public and disaster risk reduction offices are advised to take all necessary precautions and follow evacuation instructions from local authorities.