Issued at: 7:00 AM PhT (23:00 GMT) Thursday, 22 April 2021
Next update: 7:00 PM PhT (11:00 GMT) Thursday, 22 April 2021
Current Status & Outlook Typhoon BISING (SURIGAE) continues to lose strength while moving slow northward across the North Philippine Sea, well to the east of the Balintang Channel. 

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 Extreme Northern Luzon including Batanes & Babuyan Island Group.  Meanwhile, its Trough will also bring isolated to scattered rain showers and thunderstorms across portions of Northern Luzon.

24-hr Outlook: TY BISING (SURIGAE) is forecast to accelerated slightly northeastward at a speed of 14 km/hr over the western part of the North Philippine Sea. This cyclone is expected to weaken rapidly into a Category 1 Typhoon (TY) 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 southwesternmost portion of the Central Philippine Sea (near 19.6°N 124.8°E)
  • Distance 1: 304 km east-northeast of Santa Ana, Cagayan
  • Distance 2: 307 km east-southeast of Basco, Batanes
  • Distance 3: 392 km northeast of Tuguegarao City, Cagayan
How strong is it? Maximum Sustained Winds (1-min avg): 195 kph near the center…Gustiness: 240 kph.
Past Movement (06 hrs) North @ 09 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, & Isabela – 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**
  • FRIDAY EARLY MORNING: Weakens rapidlly to a Category 1 (TY) as it begins to recurve NE to ENE-ward across the western portion of the North Philippine Sea, well east of the Bashi Channel…about 509 km ENE of Basco, Batanes [2AM Apr 23: 21.4°N 126.8°E @ 150 kph].  Confidence Level: HIGH
  • SATURDAY EARLY MORNING: Weakens rapidly to a Severe Tropical Storm (STS) as it accelerates East to ESE-ward across the Eastern Part of the North Philippine Sea…about 918 km ENE of Basco, Batanes [2AM Apr 24: 22.5°N 130.6°E @ 110 kph].  Confidence Level: MEDIUM
  • SUNDAY EARLY MORNING: Weakens into a Tropical Storm (TS) while moving eastward across the eastern part of the North Philippine Sea…about to exit the NE border of the Philippine Area of Responsibility (PAR), some 1,271 km E of Basco, Batanes [2AM Apr 25: 20.4°N 134.2°E @ 85 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 480 mm [Light to Extreme]
  • Minimum Central Pressure: 940 millibars (hPa)
  • Size of Rain Circulation (in Diameter): Medium (585 km)
  • Size of Wind Circulation (55-kph Wind Diameter): Medium (780 km)
  • Area of Damaging Winds (100 kph or more wind gusts): 160 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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