Issued at: 7:00 PM PhT (11:00 GMT) Wednesday, 21 April 2021
Next update: 7:00 AM PhT (23:00 GMT) Thursday, 22 April 2021
Current Status & Outlook Typhoon BISING (SURIGAE) has weakened slightly as it begins to move northward across the North Philippine Sea, well to the east of Northern Cagayan. 

The typhoon’s westernmost rainbands will continue to 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 move north slowly at a speed of 09 km/hr over the western part of the North Philippine Sea. This cyclone is expected to weaken into a Category 3 Typhoon (TY) within the next 12 to 24 hours.

Where is BISING (SURIGAE)? As of 5:00 PM PhT today, April 21…0900 GMT:

  • Location of Center/Eye: Along the southwesternmost portion of the Central Philippine Sea (near 18.5°N 124.9°E)
  • Distance 1: 289 km east of Santa Ana, Cagayan
  • Distance 2: 313 km east-northeast of Palanan, Isabela
  • Distance 3: 350 km east-northeast of Tuguegarao City, Cagayan
How strong is it? Maximum Sustained Winds (1-min avg): 215 kph near the center…Gustiness: 260 kph.
Past Movement (06 hrs) North-Northwest @ 10 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 Catanduanes  – 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 AFTERNOON: Weakens to a Category 3 (TY) as it begins to recurve northeastward across the western portion of the North Philippine Sea, well east of the Bashi Channel…about 303 km E of Basco, Batanes [2PM Apr 22: 20.2°N 124.9°E @ 195 kph].  Confidence Level: HIGH
  • FRIDAY AFTERNOON: Weakens rapidly to a Category 1 TY as it accelerates ENE to Eastward across the North Philippine Sea…about 703 km ENE of Basco, Batanes [2PM Apr 23: 22.3°N 128.5°E @ 150 kph].  Confidence Level: HIGH
  • SATURDAY AFTERNOON: Weakens into a Severe Tropical Storm (STS) while accelerating further  towards the east across the eastern part of the North Philippine Sea…about 1,012 km E of Basco, Batanes [2PM Apr 24: 21.4°N 131.7°E @ 110 kph].  Confidence Level: LOW

**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 800 mm [Light to Extreme]
  • Minimum Central Pressure: 940 millibars (hPa)
  • Size of Rain Circulation (in Diameter): Medium (760 km)
  • Size of Wind Circulation (55-kph Wind Diameter): Medium (555 km)
  • Area of Damaging Winds (100 kph or more wind gusts): 155 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)


Typhoon2000 (T2K) Integrated Multi-Agency Tracks

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



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


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