TYPHOON BISING (SURIGAE) ADVISORY NO. 11

Issued at: 7:00 AM PhT (23:00 GMT) Wednesday, 21 April 2021
Next update: 7:00 PM PhT (11:00 GMT) Wednesday, 21 April 2021
Current Status & Outlook Typhoon BISING (SURIGAE) has moved a little bit faster during the past 6 hours as it approaches the North Philippine Sea, well to the east of Northern Luzon. 

The typhoon’s westernmost rainbands will bring overcast skies with passing “on-&-off” rain showers, severe thunderstorms and gusty winds (with the help of the NE Windflow) across the eastern & northern sections of Northern Luzon including Batanes & Babuyan Island Group.  Meanwhile, its Trough will also bring cloudy skies with isolated to scattered rain showers and thunderstorms across portions of Luzon including Metro Manila, Bicol Region, Mindoro, Marinduque, and Romblon.

24-hr Outlook: TY BISING (SURIGAE) is forecast to continue moving north-northwestward slowly at a speed of 09 km/hr over the southwestern part of the North Philippine Sea. This cyclone is expected to maintain its Category 4 status within the next 12 to 24 hours.

Where is BISING (SURIGAE)? As of 5:00 AM PhT today, April 21…2100 GMT:

  • Location of Center/Eye: Along the northwesternmost portion of the Central Philippine Sea (near 17.3°N 125.3°E)
  • Distance 1: 310 km east of Palanan, Isabela
  • Distance 2: 358 km east-southeast of Santa Ana, Cagayan
  • Distance 3: 365 km east-northeast of Casiguran, Aurora
How strong is it? Maximum Sustained Winds (1-min avg): 220 kph near the center…Gustiness: 270 kph.
Past Movement (06 hrs) North-Northwest @ 12 kph, across the Philippine Sea
Potential Philippine Landfall Area(s)
  • None
What Philippine areas will be directly affected? Heavy to Extreme Rainfall (50 mm to >100 mm expected for 24 hrs):

  • None.

Damaging Winds (gusts of more than 100 km/hr expected):

  • None. 
Potential Storm Surge/Coastal Flooding Areas+
  • Coastal Areas of Batanes, Cagayan, Aurora, Polillo Island, Northern & Eastern Catanduanes, Northern Samar – Today.

+Waves of 2 to 6 meters in height is expected in storm surge-prone areas, particularly in coastal areas on where the Tropical Cyclone is headedKindly visit the PAGASA Storm Surge Updates  for more details.

3-Day Forecast Outlook Summary**
  • THURSDAY EARLY MORNING: Weakens slightly as it begins to recurve northeastward across the southwestern portion of the North Philippine Sea, well east of the Balintang Channel…about 262 km E of Santa Ana, Cagayan [2AM Apr 22: 18.9°N 124.6°E @ 215 kph].  Confidence Level: HIGH
  • FRIDAY EARLY MORNING: Weakens into a Category 2 TY as it accelerates ENE-ward across the North Philippine Sea, well to the east of Batanes Group…about 438 km E of Basco, Batanes [2AM Apr 23: 20.7°N 126.2°E @ 165 kph].  Confidence Level: HIGH
  • SATURDAY EARLY MORNING: Turns & accelerates  toward east to east-southeast across the eastern part of the North Philippine Sea…just barely a Category 1 TY…about 865 km ENE of Basco, Batanes [2AM Apr 24: 21.9°N 130.2°E @ 120 kph].  Confidence Level: MEDIUM

**Important Note: Please be reminded that the Forecast Outlook changes every 6 hours, and the Day 2 and 3 Forecast Track have an average error of 100 and 250 km respectively… while the wind speed forecast error, averages 35 km/hr per day. Therefore, a turn to the left or right of its future track and changes in its wind speed must be anticipated from time to time.

Other Storm’s Meteorological Information
  • 24-hr. Rain Accumulation (across its circulation): 25 to 825 mm [Light to Extreme]
  • Minimum Central Pressure: 935 millibars (hPa)
  • Size of Rain Circulation (in Diameter): Medium (680 km)
  • Size of Wind Circulation (55-kph Wind Diameter): Medium (830 km)
  • Area of Damaging Winds (100 kph or more wind gusts): 175 km from the center.
Information based on data collected by Typhoon2000 (T2k) shall not be taken as official data. Weather information broadcasted and distributed by PAGASA remains as official data. Typhoon2000 (T2k) shall not be responsible for the private use and reliance of its weather information.

Issued by: David Michael V. Padua for Typhoon2000 (T2K)

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Typhoon2000 (T2K) Integrated Multi-Agency Tracks

For more info: http://www.typhoon2000.ph/multi/?name=SURIGAE

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PAGASA TROPICAL CYCLONE WIND SIGNAL



Image/Screenshot Source: DOST-PAGASA (https://pubfiles.pagasa.dost.gov.ph/tamss/weather/signals_bising.png)

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