Tropical Depression Liwayway’s trough, monsoon to bring rain

Acor Arceo
Tropical Depression Liwayway’s trough, monsoon to bring rain
Tropical Depression Liwayway is unlikely to make landfall, but its trough or extension will affect some areas

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MANILA, Philippines – The trough or extension of Tropical Depression Liwayway and the southwest monsoon or hanging habagat are expected to bring rain.

In a briefing at 5 pm on Sunday, the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA) said Liwayway is now 460 kilometers east northeast of Maasin City, Southern Leyte, or 350 kilometers east of Guiuan, Eastern Samar.

The tropical depression continues to move northwest at 20 kilometers per hour (km/h).

It still has maximum winds of 45 km/h, while its gustiness slightly increased from 55 km/h to 60 km/h. It is expected to intensify into a tropical storm while inside the Philippine Area of Responsibility (PAR).

There are no tropical cyclone wind signals due to Liwayway, and it is unlikely to make landfall.

But Liwayway’s trough will bring scattered rainshowers and thunderstorms to the following areas:

  • Bicol
  • Central Visayas
  • Eastern Visayas
  • Caraga

Flash floods and landslides are possible since the rain could be occasionally heavy. (READ: FAST FACTS: Tropical cyclones, rainfall advisories)

Based on Liwayway’s latest forecast track, it will leave PAR on Thursday, September 5.

Forecast track of Tropical Depression Liwayway as of September 1, 2019, 5 pm. Image from PAGASA

The southwest monsoon, meanwhile, will trigger scattered rainshowers and thunderstorms in these areas:

  • Pangasinan
  • Zambales
  • Bataan
  • Occidental Mindoro
  • Palawan

The rest of the country, not affected by either Liwayway’s trough or the southwest monsoon, will only have isolated rainshowers or localized thunderstorms.

Liwayway is the Philippines’ 12th tropical cyclone for 2019, and the 2nd for 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.

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. –

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Acor Arceo

Acor Arceo is the head of copy and editorial standards at Rappler. Trained in both online and TV newsrooms, Acor ensures consistency in editorial standards across all sections and also supervises Rappler’s coverage of disasters.