Typhoon Jenny maintains strength as it moves north-northwestward over the Philippine Sea, the state weather bureau said Tuesday.

In its latest weather bulletin, the Philippine Atmospheric, Geophysical, and Astronomical Services Administration, said Typhoon Jenny, as it continues to enhance Southwest Monsoon or habagat, will bring significant rains over the western portions of Central Luzon, Southern Luzon, and Visayas in the next three days.

PAGASA said the enhancement of the Southwest Monsoon by Jenny will bring gusty conditions for the next 3 days over the following areas not under any Wind Signal, especially in coastal and upland/mountainous areas exposed to winds including Bataan, the southern portion of Aurora, Metro Manila, Calabarzon, Romblon, and most of Bicol Region.

Gale Warning is hoisted in the coastal waters along the seaboards of Northern Luzon.

The typhoon will also bring moderate to rough seas (1.5 to 3.5 m) over the coastal waters of northern Aurora.

PAGASA advised mariners of motor bancas and similarly-sized vessels to take precautionary measures while venturing out to sea.

If possible, navigating in these conditions, especially if inexperienced or operating ill-equipped vessels, shall be avoided.

Typhoon Jenny is forecast to move northwestward or west-northwestward until tomorrow before turning generally westward thereafter.

On the track forecast, Jenny will make landfall over the southern portion of Taiwan between late Wednesday evening, or Thursday morning, then exit the Philippine Area of Responsibility between Thursday morning and afternoon.

When outside the PAR region, Jenny will continue moving westward slowly over the Taiwan Strait towards the coastal waters of southern China.

PAGASA said the weakening trend continues due to the increasing dry air entrainment and vertical wind shear.

"Land interaction during its passage over the rugged terrain of southern Taiwan will further weaken the tropical cyclone. Once over the Taiwan Strait, additional cool dry air from the north will entrain into JENNY, resulting in further weakening," it added.

Typhoon Jenny was last tracked over the 325 km East Northeast of Basco, Batanes as it moves North Northwestward at 10 kilometers per hour. It packs maximum sustained winds of 155 kph near the center and gustiness of up to 190 kph.

Tropical Cyclone Wind Signal

PAGASA said the Tropical Cyclone Wind Signal No. 2 is hoisted in Batanes with winds of greater than 62 kph and up to 88 kph may be expected in at least 24 hours.

TCWS No. 1 is raised over the Cagayan including Babuyan Islands, the northern and eastern portions of Isabela (Maconacon, Divilacan, Palanan, Santa Maria, San Pablo, Tumauini, Cabagan, Ilagan City, San Mariano, Santo Tomas, Dinapigue, Benito Soliven, Naguilian, Gamu, Quirino, Delfin Albano, Quezon, Mallig), Apayao, the northeastern portion of Abra (Tineg, Lacub, Malibcong), the northern portion of Kalinga (Balbalan, Pinukpuk, Rizal, City of Tabuk), and Ilocos Norte.

Winds of 39-61 kph may be expected in the above-mentioned areas for at least 36 hours or intermittent rains may be expected within 36 hours.

At least seven towns in Pangasinan have suspended classes due to the inclement weather brought by Jenny while monsoon rains continue to dump in the province.

Classes in all levels were suspended in the towns of San Manuel, Pozorrubio, and San Jacinto, while classes from pre-school to high school were canceled in the towns of Asingan, Mangaldan, and San Fabian. Only classes from pre-school to elementary were suspended in the town of Manaoag.