Issued at: 7:00 AM PhT (23:00 GMT) Tuesday, 20 April 2021
Next update: 7:00 PM PhT (11:00 GMT) Tuesday, 20 April 2021
Current Status & Outlook Typhoon BISING (SURIGAE) continues losing strength as it drifts slowly northward across the Central Philippine Sea, northeast of Catanduanes. Its outer rainbands slowly departing the Bicol Region & Samar Provinces…improving weather conditions expected by tomorrow.

This typhoon will continue to bring overcast skies with “on-&-off” rains with severe thunderstorms and gusty winds across Samar and Bicol Provinces including Bondoc Peninsula (Quezon) today.  Meanwhile, its Trough will also bring cloudy skies with isolated to scattered rain showers and thunderstorms across the Visayas, Northern Sulu Archipelago, & Northern Palawan.

24-hr Outlook: TY BISING (SURIGAE) is forecast to resume moving north-northwestward slowly at a speed of 09 km/hr across the northwestern part of the Central Philippine Sea. This cyclone is expected to weaken into a Category 3 TY within the next 12 to 24 hours.

Where is BISING (SURIGAE)? As of 5:00 AM PhT today, April 20…2100 GMT:

  • Location of Center/Eye: Along the western portion of the Central Philippine Sea (near 15.4°N 126.2°E)
  • Distance 1: 258 km northeast of Pandan, Catanduanes
  • Distance 2: 300 km northeast of Caramoan, Camarines Sur
  • Distance 3: 380 km northeast of Naga City, Camarines Sur
How strong is it? Maximum Sustained Winds (1-min avg): 215 kph near the center…Gustiness: 260 kph.
Past Movement (06 hrs) North @ 08 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):

  • Catanduanes, Partido District (CamSur), Northeastern Camarines Norte – Today.

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

  • None. 
Potential Storm Surge/Coastal Flooding Areas+
  • Coastal Areas of Cagayan, Aurora, Northern Quezon, Northern Samar & Bicol Region – 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**
  • WEDNESDAY EARLY MORNING: Weakens to a Category 3 Typhoon (TY) as it moves slowly NNW-ward across the northwestern portion of the Central Philippine Sea, E of Northern Luzon…about 287 km E of Palanan, Isabela [2AM Apr 21: 16.9°N 125.1°E @ 195 kph].  Confidence Level: HIGH
  • THURSDAY EARLY MORNING: Weakens further as it starts to recurve towards the NE while over the eastern portion of the Balintang Channel, near the coastal areas of Northern Cagayan…about 190 km ENE of Santa Ana, Cagayan [2AM Apr 22: 18.9°N 123.9°E @ 185 kph].  Confidence Level: HIGH
  • FRIDAY EARLY MORNING: Recurves & accelerates  towards the ENE across the North Philippine Sea, away from the Balintang Channel…about 398 km E of Basco, Batanes [2AM Apr 23: 20.9°N 125.8°E @ 160 kph].  Confidence Level: HIGH

**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 500 mm [Light to Extreme]
  • Minimum Central Pressure: 925 millibars (hPa)
  • Size of Rain Circulation (in Diameter): Medium (705 km)
  • Size of Wind Circulation (55-kph Wind Diameter): Medium (770 km)
  • Area of Damaging Winds (100 kph or more wind gusts): 170 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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