Manila: Tropical Depression Bising has slightly intensified, now packing maximum sustained winds of 55 kilometers per hour (kph) near the center and gustiness of up to 70 kph, as per the weather bureau's 11 a.m. update on Friday.

According to Philippines News Agency, Bising was located 280 kilometers west northwest of Calayan, Cagayan as of 10 a.m. It is moving west southwestward at a speed of 15 kph. Several areas have been placed under Tropical Cyclone Wind Signal No. 1, including the western portion of Babuyan Islands, the western portion of Ilocos Norte, and the northwestern portion of Ilocos Sur. These areas are expected to experience strong winds.

The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) reported that the southwest monsoon and Bising's periphery will bring strong to gale-force gusts across the remaining parts of Ilocos Norte, Ilocos Sur, La Union, Pangasinan, Isabela, the northern portion of Aurora, Zambales, Occidental Mindoro, Marinduque, Romblon, Palawan, and Antique.

PAGASA has also forecasted heavy rains over Ilocos Norte, Batanes, Cagayan, and Apayao due to Bising. The southwest monsoon is expected to cause heavy rains in Ilocos Sur, La Union, Pangasinan, Abra, Benguet, Zambales, and Bataan. Rough seas are anticipated in the western seaboards of Babuyan Islands and Ilocos Norte.

Mariners of small seacraft, including all types of motorbancas, have been advised by PAGASA to avoid venturing out to sea due to the rough conditions.