A tropical depression was spotted outside the Philippine Area of Responsibility off Ilocos Sur Sunday afternoon, according to the state weather bureau.
In its 24-hour public weather forecast issued at 5 p.m., Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) said the center of the tropical depression was spotted around 4 p.m. at 415 kilometers west of Sinait, Ilocos Sur.
It has maximum sustained winds of 55 kilometers per hour near the center and gustiness of up to 65 kph.
The tropical depression is forecast to move north northwest at 13 kph.
Pagasa warned of cloudy skies with light to moderate rains and thunderstorms over Pangasinan, Zambales and Bataan, and partly cloudy to cloudy skies with isolated rainshowers or thunderstorms over Metro Manila and the rest of the country.
Meanwhile, moderate to occasionally strong winds blowing from the southwest to south will prevail over the western section of Luzon, where the coastal waters will be moderate to occasionally rough.
Light to moderate winds from the southeast to south will prevail over the rest of Luzon and Visayas, and winds from the east to southeast will prevail over Mindanao with slight to moderate seas.
In its earlier weather advisory issued at 11 a.m., the state weather bureau said a low pressure area (LPA) which may develop to a tropical depression was spotted 370 kilometers west northwest of Iba, Zambales.
The LPA was then expected to develop into a tropical depression within the next 24 to 48 hours outside the Philippine area of responsibility, Pagasa said.
READ: LPA off Iba, Zambales may develop into tropical depression