'Bagyong Isang' PAGASA weather update August 20, 2017


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MANILA, Philippines - The Low Pressure Area (LPA) located at East of Batanes has developed into a tropical depression and was named "Isang", weather central PAGASA announced in its 11:00 a.m. update on Sunday, August 20, 2017.

'Bagyong Isang' PAGASA weather update August 20, 2017

At 10:00 a.m. today, the center of "Bagyong Isang" was estimated based on all available data at 735 km East of Basco, Batanes (19.5 °N, 128.9 °E).

"Bagyong Isang", the first tropical cyclone in August and 9th for the year, will enhance the Southwest Monsoon (Habagat) which will bring light to moderate with possible occasionally heavy rains over Metro Manila, Central Luzon, CALABARZON, MIMAROPA, Bicol and Visayas.

"Isang" has maximum sustained winds of 55 kph near the center and gustiness of up to 65 kph. It is forecast to move West Northwest at 19 kph.

Forecast Positions:

  • 24 Hour( Tomorrow morning): 315 km East Southeast of Basco, Batanes(19.8°N, 124.9°E)
  • 48 Hour(Tuesday morning):125 km West Northwest of Basco, Batanes(20.7°N, 120.8°E)
  • 72 Hour(Wednesday morning): 615 km West Northwest of Basco, Batanes (OUTSIDE PAR)(22.3°N, 116.4°E)
  • 96 Hour(Thursday morning):1,060 km West Northwest of Basco, Batanes (OUTSIDE PAR)(24.1°N, 112.5°E)
'Bagyong Isang' PAGASA weather update August 20, 2017

PAGASA has raised Tropical Cyclone Warning Signal (TCWS) No. 1 (30-60kph expected in 36 hrs) in two areas: Batanes group of Islands and Babuyan group of Islands.

Impacts of the wind:

  • Very light or no damage to high risk structures,
  • Light damage to medium to low risk structures
  • Slight damage to some houses of very light materials or makeshift structures in exposed communities. Some banana plants are tilted, a few downed and leaves are generally damaged
  • Twigs of small trees may be broken.
  • Rice crops, however, may suffer significant damage when it is in its flowering stage.

Wave Height: (Open Sea) 1.25-4.0 meters

The estimated rainfall amount is from moderate to occasionally heavy rains within the 300 km diameter of the Tropical Depression.

It is expected to intensify into a Tropical Storm within the next 24 to 36 hours.

PAGASA added that the cyclone is closest to Batanes group of islands tomorrow (August 21) late evening or Tuesday (August 22) early morning.

Stay dry and safe, everyone!

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