Tropical depression "Tonyo" left the Philippine landmass and was over the coastal waters of Paluan, Occidental Mindoro Sunday afternoon.
Tonyo slightly accelerated at 30 kilometers per hour (kph) but maintained its westward direction, according to the Philippine Atmospheric, Geophysical, and Astronomical Services Administration.
Should it remain on course, Tonyo will be outside the Philippine Area of Responsibility Monday morning.
The tropical depression also maintained its maximum sustained winds of 45 kph near the center and gustiness of up to 60 kph.
PAGASA is not ruling out Tonyo's possible intensification into a tropical storm within 24 hours.
Storm warnings have been lifted over several areas but tropical cyclone wind signal No. 1 remains over the northwestern portion of Occidental Mindoro, particularly Abra de Ilog, Paluan, Mamburao, and Sta. Cruz, including Lubang Island.
PAGASA said the weather disturbance will continue to bring light to moderate with at times heavy rains over Ilocos Norte, Ilocos Sur, La Union, Pangasinan, Abra, Apayao, Benguet, Ifugao, Kalinga, Mountain Province, Aurora, Batanes, Cagayan, Isabela, Nueva Vizcaya, Quirino, Oriental Mindoro, Occidental Mindoro, and Palawan, including Calamian and Kalayaan Islands.
Areas under signal No. 1 are currently experiencing or will experience strong breeze to near gale conditions with occasional gusts throughout the passage of Tonyo.
The northeast monsoon or "amihan" may also bring strong breeze to near gale conditions over Batanes, Babuyan Islands, Ilocos Norte, Apayao, and the northern portion of mainland Cagayan.
PAGASA said Tonyo and the easterlies, or the warm and humid winds originating from the Pacific, will cause moderate to rough seas over areas under signal No. 1, eastern seaboards of Cagayan Valley, Aurora, northern portion of Quezon, and northern and eastern seaboards of Catanduanes.
Those using small boats were advised to take precautionary measures when venturing out to sea, while inexperienced mariners were recommended to avoid navigating in these conditions.
The amihan will also trigger rough to very rough seas over the seaboards of Batanes, Ilocos Norte, Ilocos Sur, and the northern seaboards of Cagayan and Babuyan Islans.
Sea travel has been suspended in these areas.