Environment

Tropical Storm “Sanba” (Basyang) to make landfall over Mindanao, Philippines


Tropical Storm “Sanba,” known in the Philippines as Basyang, formed February 11, 2018 east of the Philippines as the second named storm of the 2018 Pacific typhoon season. Sanba has slightly accelerated today while moving closer towards Eastern Mindanao. Landfall is expected in Caraga Region tomorrow morning (local time) or afternoon, February 13.

At 06:00 UTC on February 12, the center of Tropical Storm “Sanba” (Basyang) was located about 200 km (124 miles) north of Sonsorol.

Its 10-minute sustained winds were 65 km/h (40 mph), while 1-minute sustained winds are at 65 km/h (40 mph), with gusts of up to 95 km/h (60 mph).

The minimum barometric pressure was at 1 002 hPa and the system was moving west at 24 km/h (15 mph).

Tropical Storm “Sanba” (Basyang) at 08:30 UTC on February 12, 2018. Credit: JMA/Himawari-8, PAGASA

Scattered to widespread moderate to heavy rains will prevail in the next 24 hours over Visayas, Caraga, Northern Mindanao, Zamboanga Peninsula and the provinces of Davao del Norte, Davao del Sur, Davao Oriental, Compostela Valley, North Cotabato, Maguindanao and Lanao del Sur, PAGASA warned 17:00 PHT (09:00 UTC).

Residents of these areas must continue monitoring for updates, take precautionary measures against possible flooding and landslides, and coordinate with their respective local disaster risk reduction and management offices, it said.

Sanba is expected to make landfall in Caraga Region tomorrow morning or afternoon (February 13).

Tropical Storm Sanba (Basyang) PAGASA forecast track at 9z February 12, 2018

Sea travel remains risky over the seaboards of areas under Tropical Cyclone Warning Signal (TCWS), the seaboard of Northern Luzon, and the eastern seaboards of Central Luzon, Southern Luzon and Eastern Visayas due to the approaching Tropical Storm and the surge of the Northeast Monsoon.

There is a possibility of raising of the TCWS #1 over Aklan, Capiz, Antique, Zamboanga Sibugay and the rest of Zamboanga del Norte and of Zamboanga del Sur today.

As of 17:00 PHT (09:00 UTC) Tropical Cyclone Warning Signal #2 (TCWS) is in effect Surigao del Sur Surigao del Norte, Agusan del Norte, Agusan del Sur, Mindanao.

TCWS #1 is in effect in the southern portion of Samar, southern portion of Eastern Samar, Leyte, Southern Leyte, Bohol, Cebu, Negros Oriental, Negros Occidental, Siquijor, Guimaras, and Iloilo, Visayas.

TCWS #1 is also in effect at Dinagat Islands, Camiguin, Compostela Valley, Davao Oriental, Davao del Norte, Misamis Oriental, Misamis Occidental, Lanao del Norte, Lanao del Sur, Bukidnon, northern portion of Zamboanga del Norte and the northern portion of Zamboanga del Sur, Mindanao.

Tropical Storm Sanba on February 12, 2018

Tropical Storm “Sanba” on February 12, 2018. Credit: NASA/NOAA Suomi NPP/VIIRS

Tropical Storm Sanba 3-hr precipitation accumulation at 09:00 UTC on February 12, 2018

Tropical Storm “Sanba” 3-hr precipitation accumulation at 09:00 UTC on February 12, 2018. Credit: earth.nullschool.net

Sanba will track generally WNW toward the southern Philippines over the next 12 hours, JTWC said 09:00 UTC today. Marginally favorable environmental conditions will allow for slight intensification to 74 km/h (46 mph).

The system is expected to turn more westward after making landfall over Northern Mindanao just before 09:00 UTC, February 13. Land interaction will slightly weaken the system and by 18:00 UTC on February 13, it will be reduced to 65 km/h (40 mph) as it tracks across the Sulu Sea, Palawan and into the South China Sea.

In the extended forecast, Sanba will track more northwestward toward southern Vietnam and weaken to 46 km/h (28 mph) before it reaches the land.

Featured image: Tropical Storm “Sanba” at 06:40 UTC on February 12, 2018. Credit: JMA/Himawari-8



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