Typhoon "Bising" (international name "Surigae") has maintained its strength and was already over the Philippine Sea east of Babuyan Islands on Wednesday evening, April 21.
In its 11 p.m. severe weather bulletin, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) located the center of the eye of typhoon "Bising" at 340 kilometers east of Aparri, Cagayan around 10 p.m.
Moving north at 15 kph, Bising maintained its maximum sustained winds of 165 kilometers per hour (kph) and gustiness of up to 205 kph.
READ: mb.com.ph/2021/04/21/four-areas-remain-under-signal-no-1-as-bising-slightly-weakens/
Signal No. 1 remains hoisted over Batanes, eastern portion of Cagayan (Santa Ana, Gonzaga, Lal-Lo, Gattaran, Baggao, Peñablanca, Camalaniugan, Buguey, Aparri, Santa Teresita, Alcala, Amulung, Iguig, Tuguegarao City) including Babuyan Islands, and eastern portion of Isabela (San Pablo, Maconacon, Divilacan, Tumauini, Cabagan, Palanan, Dinapigue, San Guillermo, Benito Soliven, San Mariano, Ilagan, Gamu, Naguilian).
PAGASA said these areas may still experience gusty winds due to typhoon Bising.
In the next 24 hours, PAGASA said the northeasterly wind flow enhanced by Bising will also bring strong breeze to near-gale conditions with higher gusts over the coastal and mountainous areas of Ilocos Region, Apayao, Abra, and the western portion of Cagayan.
READ: mb.com.ph/2021/04/20/tropical-cyclone-bising-tracker-7/
Bising and the enhanced northeasterly surface wind flow may also trigger rough to high seas over the northern and eastern seaboards of Northern Luzon with wave heights reaching up to 2.5-9.0 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 eastern coastlines of Central and Southern Luzon (2.5-5.0 m) and rough seas over the western seaboard of Northern Luzon (2.5-4.0 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-northeast until Thursday evening, April 22, away from the Luzon landmass before turning east-northeast by Friday, April 23, and eastward by Saturday, April 24.
Bising will likely leave the Philippine area of responsibility (PAR) by Sunday morning, 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 410 km east of Basco, Batanes by Thursday evening; 855 km east-northeast of extreme northern Luzon by Friday evening; 1,260 km east of extreme northern Luzon by Saturday evening; and 2,000 km east-northeast of extreme northern Luzon or outside the PAR by Sunday evening.