MANILA, Philippines — Signal No. 2 is up over Northern Luzon provinces as 'Leon' developed into a typhoon, the state-run weather agency said on Tuesday.

Affected areas include Batanes, Babuyan Islands, the eastern portion of mainland Cagayan (Gattaran, Baggao, Lal-Lo, Aparri, Camalaniugan, Buguey, Santa Teresita, Gonzaga, Santa Ana and Pe), and the northeastern portion of Isabela (Divilacan, Palanan and Maconacon), the Philippine Atmospheric Geophysical and Astronomical Services Administration (Pagasa) said in its 11 a.m. bulletin.