Issued at: 7:00 AM PhT (23:00 GMT) Saturday, 24 April 2021
Current Status & Outlook BISING (SURIGAE) downgraded into a Severe Tropical Storm (STS) as it moves eastward slowly across the North Philippine Sea…will exit the Philippine Area of Responsibility (PAR) by tomorrow.

24-hr Outlook: STS BISING (SURIGAE) is forecast to move east-southeastward at an increased speed of 17 km/hr across the Western Pacific Ocean. This cyclone is expected to begin transition into an Extratropical Cyclone within the next 24 to 36 hours.

Where is BISING (SURIGAE)? As of 5:00 AM PhT today, April 24…2100 GMT:

  • Location of Center/Eye: Along the easternmost portion of the North Philippine Sea (near 23.1°N 130.9°E)
  • Distance 1: 964 km east-northeast of Basco, Batanes
  • Distance 2: 972 km east of Taipei, Taiwan
  • Distance 3: 1,044 km east-northeast of Santa Ana, Cagayan
How strong is it? Maximum Sustained Winds (1-min avg): 110 kph near the center…Gustiness: 140 kph.
Past Movement (06 hrs) East @ 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+
  • None.

+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.

1-Day Forecast Outlook Summary**
  • SUNDAY EARLY MORNING: About to exit PAR as it starts transitioning into an Extratropical Cyclone…about 1,279 km E of Basco, Batanes [2AM Apr 25: 22.3°N 134.2°E @ 75 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 400 mm [Light to Extreme]
  • Minimum Central Pressure: 985 millibars (hPa)
  • Size of Rain Circulation (in Diameter): Medium (765 km)
  • Size of Wind Circulation (55-kph Wind Diameter): Medium (660 km)
  • Area of Damaging Winds (100 kph or more wind gusts): 180 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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