The Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA) on Wednesday, Oct. 4, reported the slight intensification of typhoon Jenny (international name: Koinu) as it moved westward toward southern Taiwan.

In its 5 p.m. weather update, the state weather bureau said “Jenny” had maximum sustained winds of 155 kilometers per hour (kph), showing a slight strengthening from the previous update at 11 a.m., which recorded winds at 150 kph.

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https://mb.com.ph/2023/10/4/typhoon-jenny-maintains-strength-continues-to-enhance-habagat

PAGASA last spotted "Jenny" 155 kilometers (km) north, northeast of Itbayat, Batanes with gustiness of up to 190 kph, moving 15 kph westward.

Rainfall forecast

PAGASA's forecast showed that there is a possibility of accumulated rainfall ranging from 100 to 200 millimeters (mm) in Batanes and 50 to 100 mm in the northern portion of Babuyan Islands from Oct. 4 to noon on Oct. 5.

Additionally, from noon on Oct. 5 to noon on Oct. 6, PAGASA said an estimated 50 to 100 mm rainfall is expected in Batanes and the northern portion of Babuyan Islands.

"Forecast rainfall are generally higher in elevated or mountainous areas," PAGASA said in a bulletin.

"Under these conditions, flooding and rain-induced landslides are possible especially in areas that are highly or very highly susceptible to these hazards as identified in hazard maps and in localities that experienced considerable amounts of rainfall for the past several days," it added.

Enhanced 'habagat' to continue

PAGASA said typhoon Jenny will continue to enhance the southwest monsoon or "habagat" resulting in intermittent rains over the western portions of Luzon until Oct. 7.

Under the influence of a tropical cyclone, PAGASA issued a gale warning in the coastal waters of Northern Luzon.

PAGASA also issued a warning over the coastal waters of northern Aurora where "Jenny" will bring moderate to rough sea conditions.

"Mariners of motor 'bancas' and similarly-sized vessels are advised to take precautionary measures while venturing out to sea and, if possible, avoid navigating in these conditions, especially if inexperienced or operating ill-equipped vessels," PAGASA noted.

Signal No. 3 still up

Meanwhile, PAGASA noted that the northern portion of Itbayat, Batanes, is still under Tropical Cyclone Wind Signal (TCWS) No. 3.

Based on its latest advisory, PAGASA said Signal No. 2 was still hoisted for the rest of Batanes and the northern portion of Babuyan Islands, which includes Babuyan Island and Calayan Island.

PAGASA said the rest of Babuyan Islands, the northern portion of mainland Cagayan (Santa Ana, Gonzaga, Buguey, Santa Teresita, Lal-Lo, Camalaniugan, Pamplona, Claveria, Aparri, Ballesteros, Abulug, Allacapan, Sanchez-Mira, Santa Praxedes, Lasam, Gattaran), the northern portion of Apayao (Calanasan, Pudtol, Luna, Santa Marcela, Flora), and the northern portion of Ilocos Norte (Piddig, Bangui, Vintar, Burgos, Pagudpud, Bacarra, Adams, Pasuquin, Carasi, Dumalneg, Laoag City) are under Signal No. 1.