'Bagyong Bising' PAGASA weather update April 20, 2021

MANILA, Philippines – 'Bagyong Bising' (international name: Surigae) further weakens as it continues to move slowly northward, state weather bureau PAGASA announced in its 5:00 am bulletin on Tuesday, April 20, 2021.

'Bagyong Bising' PAGASA satellite image April 20

On the forecast track, Typhoon 'Bising' will move generally northward or north northwestward until tomorrow evening (April 21) or Thursday (April 22) early morning. It is projected to exit the Philippine Area of Responsibility (PAR) on Sunday, April 25.

'Bising' is also expected to be downgraded to severe tropical storm by Saturday evening or Sunday early morning.

At 4:00 am today, the center of the eye of Typhoon 'Bising' was located based on all available data at 505 km East of Infanta, Quezon. It has maximum sustained winds of 175 km/h near the center and gustiness of up to 215 km/h.

Forecast Positions
  • 24 Hour (Tomorrow morning): 375 km East of Casiguran, Aurora
  • 48 Hour (Thursday morning):305 km East of Aparri, Cagayan
  • 72 Hour (Friday morning): 380 km East of Basco, Batanes
  • 96 Hour (Saturday morning):855 km East Northeast of Extreme Northern Luzon
  • 120 Hour (Sunday morning):1,410 km East Northeast of Extreme Northern Luzon (OUTSIDE PAR)

'Bagyong Bising' PAGASA track April 20


TCWS No. 2 (61-120 km/h winds prevailing or expected in 24 hours)

  • Catanduanes
  • the eastern portion of Camarines Sur (Sagnay, San Jose, Lagonoy, Garchitorena, Presentacion, Caramoan)
  • the northeastern portion of Albay (Tiwi, Malinao, Tabaco City, Malilipot, Bacacay, Rapu-Rapu)

TCWS No. 1 (30-60 km/h winds prevailing or expected in 36 hours)

  • Batanes
  • Cagayan including Babuyan Islands
  • Isabela
  • Quirino
  • Apayao
  • the eastern portion of Kalinga (Pinukpuk, Rizal, Tabuk City)
  • the extreme eastern portion of Mountain Province (Paracelis)
  • the extreme eastern portion of Ifugao (Alfonso Lista)
  • the northern portion of Aurora (Baler, Dipaculao, Dinalungan, Casiguran, Dilasag)
  • the eastern portion of Quezon (Calauag, Guinayangan, Tagkawayan, Buenavista, San Narciso, San Andres) including Polillo Islands
  • Camarines Norte
  • the rest of Camarines Sur
  • the rest of Albay
  • Sorsogon
  • the northern portion of Masbate (Aroroy, Masbate City, Baleno, Mobo, Uson, Palanas, Dimasalang) including Burias and Ticao Island

  • Northern Samar
  • the northern portion of Samar (Tagapul-An, Almagro, Santo Nino, Calbayog City, Santa Margarita, Gandara, Pagsanghan, Tarangnan, San Jorge, San Jose de Buan, Matuguinao)
  • the northern portion of Eastern Samar (Maslog, Can-Avid, Dolores, Oras, San Policarpo, Arteche, Jipapad)

'Bagyong Bising' PAGASA signal April 20

Hazards affecting land areas

Heavy Rainfall

Today, heavy to intense rains will be experienced over Catanduanes. Moderate to heavy rains over the eastern portion of Camarines Sur and Rapu-Rapu Islands.

Under these conditions and considering the antecedent rainfall over the aforementioned areas, flooding (including flashfloods) and rain-induced landslides are highly likely to occur especially in areas identified in hazard maps as highly or very highly susceptible to these hazards.

Severe Winds

Tropical cyclone winds of at least strong breeze to near gale in strength extend outward up to 500 km from the center of the typhoon. Destructive typhoon-force winds extend outward up to 110 km from the center of the typhoon.

Considering the uncertainty in the projected path of the typhoon over the next 48 hours, the possibility of hoisting Tropical Cyclone Wind Signal No. 2 over some areas in the eastern portion of Cagayan and Isabela is not ruled out at this time.

In the next 24 hours, the northeasterly wind flow enhanced by the typhoon will also bring strong breeze to near gale conditions with higher gusts over the rest of Northern Luzon and the rest of Aurora and Quezon that are not under any TCWS. Such conditions are more likely to occur in the coastal and mountainous areas.

Hazards affecting coastal waters

In the next 24 hours, under the influence of the typhoon and an enhanced northeasterly wind flow, the following sea conditions will be experienced over the coastal waters of the country:

Very rough to high seas over the northern and eastern seaboards of Luzon (4.5 to 10.0 m), and rough to high seas over the northern and eastern seaboards of Eastern Visayas (3.0 to 7.0 m) Sea travel is risky for all types of seacrafts over these waters.

Rough to very rough seas over the northern and western seaboards of Northern Luzon (2.8 to 4.5 m), and rough seas over the eastern seaboards of Caraga and Davao Oriental and the remaining seaboards of areas under TCWS (2.5 to 4.0 m) Sea travel is risky for small seacrafts over these waters. Mariners without the proper experience should immediately seek safe harbor.

Moderate to rough seas over the western seaboard of Central Luzon (1.2 to 3.0 m). Mariners of small seacrafts are advised not to venture out over these waters. Inexperienced mariners of these vessels should avoid navigating in these conditions.

About the typhoon

'Bising' entered PAR on Friday morning, April 17.

PAGASA predicts that 1–4 tropical cyclones are expected to form between April and June.

On average, there are 20 tropical cyclones that could form or enter the PAR each year. Only have of those are projected to make landfall.

— The Summit Express

1 Comment

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  1. May i ask if ilocos region will suffer heavy rain or not ..thanks

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