REGIONAL SUMMARY:
For the fourteenth week of 2023, a total of 17 disasters (floods, landslides, storms, and wind-related) affected the region. Indonesia, the Philippines, and Thailand have reportedly been affected. Badan Nasional Penanggulangan Bencana (BNPB) reported floods, landslides, storms, and strong wind caused by moderate to heavy rainfall and strong wind in Gorontalo, West Java, Central Java, East Java, Central Kalimantan, West Nusa Tenggara, East Nusa Tenggara, Papua, South Sulawesi, and Central Sulawesi. The Philippines’ National Disaster Risk Reduction and Management Council (NDRRMC) also reported floods due to sustained heavy rains and localised thunderstorms in Pikit (Cotabato). Lastly, the Department of Disaster Prevention and Mitigation (DDPM) reported that storms affected 8 provinces in Thailand.
HIGHLIGHT:
According to BNPB, starting from 3 April, flooding and landslide events caused by moderate to high-intensity rainfall were reported almost throughout Dompu Regency (West Nusa Tenggara), which included Kecamatan Dompu, Woja, Pajo, and Manggelewa. On 4 April, BNPB reported that the flooding and landslide in Dompu Regency have resulted in 4.1K families (16.7K persons) and 4.1K houses affected. BNPB also reported flooding events caused by prolonged moderate to heavy rainfall in Cirebon Regency, which resulted in 3.8K families (8.3K persons) affected. Repoert of damaged includes 2.8K houses and 13 public facilities. Local disaster management agencies have carried out necessary actions, continue to monitor, and assess the situation.
HYDRO-METEO-CLIMATOLOGICAL:
For the past week, data from the ASEAN Specialised Meteorological Centre (ASMC) showed medium to high 7-day average rainfall spreading across Java, Sumatra, Kalimantan, Sulawesi, and Papua in Indonesia; and Peninsular Malaysia. As of reporting, Tropical Disturbance INVEST 90W was estimated based on available data at 890 km East of Visayas, Philippines. INVEST 90W may develop into a tropical depression as it moves generally westward towards southern Luzon-Visayas area over the Philippine Sea (PAGASA, JTWC).
GEOPHYSICAL:
Ten (10) significant earthquakes (M?5.0) were recorded by Indonesia’s Badan Meteorologi, Klimatologi, dan Geofisika (BMKG), Philippine Institute of Volcanology and Seismology (PHIVOLCS), and Thailand’s Meteorological Department (TMD). Mount Semeru (alert level III) in Indonesia, and Taal (alert level 1), Mayon Volcano (alert level 1), and Kanlaon (alert level 1) in the Philippines reported recent volcanic activity according to Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) and PHIVOLCS.
OUTLOOK:
According to the ASEAN Specialised Meteorological Centre (ASMC), for the coming week, drier conditions are expected over parts of the western and central Maritime Continent. Warmer than usual temperatures are expected over central Mainland Southeast Asia. For the regional assessment of extremes, there is a low chance for a very heavy rainfall event to occur; and small increase in chance for extreme hot conditions in the parts of western Mainland Southeast Asia. La Niña conditions have now ended.
Sources:
ASEAN Disaster Monitoring & Response System (DMRS); ASEAN Specialised Meteorological Centre (ASMC); Joint Typhoon Warning Centre (JTWC);
Indonesia: BNPB, BMKG, PVMBG;
Philippines: NDRRMC, PAGASA; PHIVOLCS, DSWD;
Thailand: DDPM, TMD;
Various news agencies.
