A low-pressure area off Borongan in the Visayas intensified into a tropical cyclone before noon Sunday, June 26, the Philippine Atmospheric Geophysical and Astronomical Services Administration said.
Pagasa said the tropical depression has been codenamed Ambo, the first cyclone in the country this year.
In its 11:30 a.m. advisory, it said Ambo was estimated at 182 kilometers east of Virac, Catanduanes as of 10 a.m., with maximum winds of 45 kilometers per hour (kph) near the center.
Under Storm Signal 1 arr Catanduanes, Camarines Norte, Camarines Sur, Northern Quezon including Polillo Islands, Aurora and Quirino.
But it may weaken after making landfall over Aurora province Monday, June 27.
Ambo is forecast to move west-northwest at 19 kph and is expected to be 80 kms east of Baler, Aurora Monday morning, and 220 kms west of Laoag City Tuesday morning, June 28.
By Wednesday morning, June 29, it is expected to be 660 km northwest of Laoag City or 700 kms west of Basco, Batanes.
Pagasa said Ambo may bring rainfall of 2.5 to 10 mm per hour (moderate to heavy) within its 200-km diameter.
It warned of occasional moderate to heavy rains over Central Luzon, Calabarzon and Bicol. MC