Typhoon "Bising" (international name "Surigae") slightly weakened but moved faster on Wednesday afternoon, April 21.
In its 5 p.m. severe weather bulletin the Philippine Atmospheric, Geophysical and Astronomical Services Administration's (PAGASA) located the center of the eye of Bising 345 kilometers (km) east-northeast of Tuguegarao City, Cagayan around 4 p.m.
It has slightly weakened with maximum sustained winds of 165 kilometers per hour (kph) near the center and gustiness of up to 255 kph. It is moving north at 15 kph.
Signal No. 1 remains hoisted over four areas--Batanes, eastern portion of Cagayan, Babuyan Islands, and eastern portion Isabela.
"Tropical cyclone winds of at least strong breeze to near-gale in strength extend outward up to 370 km from the center of the typhoon. (Likewise), destructive typhoon-force winds extend outward up to 90 km from the center of the typhoon," PAGASA warned.
In the next 24 hours, PAGASA said the northeasterly wind flow enhanced by the typhoon will also bring strong breeze to near-gale conditions with higher gusts over the coastal and mountainous areas of Northern Luzon that are not under any tropical cyclone wind signal.
Bising and the enhanced northeasterly surface wind flow may also trigger rough to high seas over the northern and eastern seaboards of Northern Luzon and eastern seaboard of Central Luzon with wave heights up to 2.5-7.0 meters (m).
"Sea travel is risky for all types of seacrafts over these waters," PAGASA advised.
Rough to very rough seas will likewise prevail over the western coastline of Northern Luzon (2.8-4.5 m) and the eastern seaboard of Southern Luzon (2.8-4.5 m) which could be dangerous for small boats.
Bising's projected track and intensity
Typhoon Bising is expected to continue to move generally north or north-northwest until Wednesday evening or Thursday morning, April 22 when the typhoon will be nearest the landmass of northern Luzon, PAGASA said.
Afterward, the typhoon will begin to move northeast away from the Luzon landmass throughout Thursday, then turn east-northeast between Friday, April 23, and April 24, Saturday.
Bising will likely leave the Philippine area of responsibility (PAR) by Sunday, April 25.
PAGASA said Bising will gradually weaken throughout the forecast period and could be downgraded into a severe tropical storm by Friday and a tropical storm by Saturday.
Bising will likely be at 335 km east of Basco, Batanes by Thursday afternoon; 695 km east of Itbayat, Batanes by Friday afternoon; 1,040 km east of extreme northern Luzon by Saturday afternoon; and 1,645 km east of extreme northern Luzon or outside the PAR by Sunday afternoon.