Tropical Storm Leon as of 10:00 p.m. on October 27, 2024. Handout/DOST-PAGASAMANILA -- Tropical storm Leon continued to move westward over the Philippine Sea while putting three provinces under Tropical Cyclone Wind Signal No. 1 late Sunday.

PAGASA said in its 11 p.m. bulletin that the following areas are under Signal No. 1:

-The eastern portion of mainland Cagayan (Santa Ana, Lal-Lo, Gattaran, Baggao, Santa Teresita, Gonzaga, Peñablanca), 

-The eastern portion of Isabela (Maconacon, Divilacan, Ilagan City, San Pablo, Cabagan, Tumauini, Palanan, San Mariano, Dinapigue)

-The northeastern portion of Catanduanes (Pandan, Bagamanoc, Panganiban, Viga)

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More areas will be placed under wind signals as the storm moves closer to land.

Leon was last seen at 915 kilometers East of Central Luzon at 10 p.m. It carries maximum sustained winds of 85 km/h near the center, gustiness of up to 105 km/h while moving westward at 20 km/h. 

The track and intensity forecast of Tropical Storm Leon as of 11:00 p.m. on October 27, 2024. Handout/DOST-PAGASAIt has strong to gale-force winds extend outwards up to 520 km from the center.

PAGASA said the outer rainbands of Leon will have an effect on the extreme Northern Luzon. The trough of the tropical storm may also affect the areas of Visayas, Mindanao, and the western section of Southern Luzon.

Leon is expected to move westward for the next 24 hours before moving generally northwestward from Monday evening until Wednesday, then north northwestward for the rest of the forecast period. 

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A westward shift in the track from the strengthening of the high pressure area steering Leon may bring closer to Extreme Northern Luzon or even lead to a landfall.

Leon may reach severe tropical storm category Monday and typhoon category on Tuesday. This tropical cyclone may also undergo rapid intensification, said PAGASA.