MANILA, Philippines — Tropical Depression Kristine is expected to intensify into a tropical storm in 12 hours although it slightly decelerated while moving westward over the Philippine Sea, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) said on Monday.

In its 5 p.m. bulletin, Pagasa said Signal No. 1 remains up in the southeastern portion of Isabela (Palanan and Dinapigue), Aurora, the northern and eastern portions of Quezon (Tagkawayan, Guinayangan, Buenavista, San Narciso, San Andres, General Nakar, Pitogo, San Francisco, Calauag, Pagbilao, Infanta, Lopez, Catanauan, Mulanay, Unisan, General Luna, Plaridel, Quezon, Alabat, Sampaloc, Padre Burgos, Macalelon, Mauban, Perez, Agdangan, Gumaca, Atimonan and Real) including Polillo Islands, Camarines Norte, Camarines Sur, Catanduanes, Albay, Sorsogon, and Masbate including Ticao Island and Burias Island.