The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) reported that the storm—internationally designated as “Mirinae”—had developed into a typhoon with peak winds of 140 kilometers per hour gusting up to 170 kph. On Wednesday, at 10 p.m. PAGASA located Mirinae in the Pacific 1,210 km east of Central Luzon, moving west at 24 kph.

Forecaster Robert Sawi said that Mirinae—locally named “Santi” as it entered the Philippine area of responsibility late Wednesday—was likely to hit northern or central Luzon on Saturday.

Pagasa advised residents in low-lying areas and near mountain slopes with storm signals to take precautionary measures against possible flashfloods and landslides.

Polillo Island is under Signal No. 2 while the provinces of Isabela, Ifugao, Aurora, Quirino, Nueva Vizcaya, Nueva Ecija, Bulacan, Rizal, Quezon, Camarines Norte, and Camarines Sur are under Signal No. 1, according to the latest bulletin by the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa).