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MANILA, Philippines – Two areas were placed under Signal No. 1 on Saturday afternoon, September 28, as Tropical Storm Onyok (Mitag) slightly strengthened.

In a bulletin issued 5 pm on Saturday, the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA) said Onyok now has maximum winds of 75 kilometers per hour (km/h) from the previous 65 km/h and gustiness of up to 90 km/h from the previous 80 km/h.

Onyok might intensify further into a severe tropical storm within 24 hours, and then possibly into a typhoon after that. (READ: FAST FACTS: Tropical cyclones, rainfall advisories)

It is already 890 kilometers east of Tuguegarao City, Cagayan, moving northwest at the same relatively fast pace of 35 km/h.

Onyok is not expected to make landfall in the Philippines. But Signal No. 1 is raised in:

• Batanes
• Babuyan Group of Islands

Signal No. 1 means winds of 30 km/h to 60 km/h are expected in at least 36 hours.

Travel is also risky, especially for small vessels, in seaboards of areas under Signal No. 1.

PAGASA added that Onyok’s trough or extension is bringing scattered rainshowers and thunderstorms, ranging from light to moderate. Two regions are affected:

Saturday, September 28, until Sunday afternoon, September 29

• Bicol
• Eastern Visayas

The rest of the country will only have isolated rainshowers or localized thunderstorms for the remainder of the weekend.

Based on Onyok’s latest forecast track, it could leave the Philippine Area of Responsibility on Monday, September 30.

Onyok is the Philippines’ 15th tropical cyclone for 2019, and the 5th in September. (READ: LIST: PAGASA’s names for tropical cyclones in 2019)

The country gets an average of 20 tropical cyclones annually, but since 2019 is an El Niño year, only 14 to 18 tropical cyclones are expected.

At most 4 tropical cyclones had been previously forecast for September. Below is the estimated number of tropical cyclones from September to December:

• September – 2 to 4
• October – 2 or 3
• November – 1 or 2
• December – 0 or 1

PAGASA declared the start of the rainy season last June 14. – Rappler.com