Issued at: 7:00 PM PhT (11:00 GMT) Saturday, 17 April 2021
Next update: 7:00 AM PhT (23:00 GMT) Sunday, 18 April 2021
Current Status & Outlook BISING (SURIGAE) has reached Super Typhoon classification while accelerating more northwestward across the Philippine Sea during the past 12 hours. This typhoon is expected to bring occasional rains with severe thunderstorms and gusty winds across Samar and Bicol Provinces beginning tomorrow, Sunday through Monday evening (Apr 18-19).  

24-hr Outlook: STY BISING (SURIGAE) is forecast to resume moving west-northwestward across the southwestern portion of the Central Philippine Sea at a decreased forward speed of 16 km/hr. This cyclone is forecast to maintain its Super Typhoon strength for the next 12 to 24 hours due to favorable oceanic and atmospheric conditions.

Where is BISING (SURIGAE)? As of 5:00 PM PhT today, April 17…0900 GMT:

  • Location of Center/Eye: Along the southern portion of the Central Philippine Sea (near 11.7°N 129.7°E)
  • Distance 1: 465 km east of Borongan City, Eastern Samar
  • Distance 2: 632 km east-southeast of Virac, Catanduanes
  • Distance 3: 737 km east-southeast of Naga City, Camarines Sur
How strong is it? Maximum Sustained Winds (1-min avg): 240 kph near the center…Gustiness: 295 kph.
Past Movement (06 hrs) Northwest @ 22 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):

  • Bicol Region & Eastern Visayas – beginning tomorrow, Sunday (Apr 18).

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

  • None
Potential Storm Surge/Coastal Flooding Areas+
  • Coastal Areas of Eastern Visayas & Bicol Region.

+Waves of 3 to 5 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**
  • SUNDAY AFTERNOON: No longer a Super Typhoon (STY) as it resumes moving WNW-ward across the southwestern portion of the Central Philippine Sea…about 353 km E of Legazpi City, Albay [2PM Apr 18: 13.3°N 127.0°E @ 240 kph].  Confidence Level: HIGH
  • MONDAY AFTERNOON: Weakens further and slows down while veering to the NNW…passing just to the east-northeast of Catanduanes…about 245 km ENE of Pandan, Catanduanes [2PM Apr 19: 14.8°N 126.3°E @ 220 kph].  Confidence Level: MEDIUM
  • TUESDAY AFTERNOON: Moving slowly NNW to NW-ward across the northwestern portion of the Central Philippine Sea…about 289 km NE of Pandan, Catanduanes  [2PM Apr 20: 16.1°N 125.8°E @ 205 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 550 mm [Light to Extreme]
  • Minimum Central Pressure: 925 millibars (hPa)
  • Size of Rain Circulation (in Diameter): Large (1,060 km)
  • Size of Wind Circulation (55-kph Wind Diameter): Medium (780 km)
  • Area of Damaging Winds (100 kph or more wind gusts): 165 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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