BMKG: Twin cyclone systems 93S and 95W to trigger heavy rainfall today
Jakarta — Indonesia’s Meteorological, Climatological, and Geophysical Agency (BMKG) says the presence of two tropical cyclone systems, 93S and 95W, operating near Indonesian waters is likely to trigger increased rainfall across several regions today, Monday.
BMKG forecaster Diahayu, speaking during an online briefing in Jakarta on Monday, stated that BMKG is monitoring tropical cyclone system 93S in the Indian Ocean south of Lampung, with maximum wind speeds of approximately 30 knots and minimum atmospheric pressure of 999 hPa.
BMKG confirmed that the system has low potential to develop into a full tropical cyclone within the next 48 hours and is expected to weaken with wind intensity decreasing to approximately 25 knots between 48 and 72 hours. The cyclone system is also inducing the formation of strong lower-level jet winds and convergence areas in the Indian Ocean south of Lampung.
BMKG is also monitoring tropical cyclone system 95W, detected in the Pacific Ocean north of Papua, with maximum wind speeds of approximately 15 knots and minimum atmospheric pressure of 1006 hPa.
This system also has low potential to develop into a full tropical cyclone within the next 48 hours and is expected to weaken over the next two to three days.
In addition to the two cyclone systems, BMKG has identified cyclonic circulation in waters west of Aceh and the Sulawesi Sea, forming convergence areas from waters west of Aceh to the Aceh region and around the Sulawesi Sea.
Diahayu explained that the combination of atmospheric dynamics from the tropical cyclone systems, cyclonic circulation, and wind convergence increases the potential for thundercloud development across several Indonesian regions.
BMKG has cautioned the public to be alert to potential heavy to very heavy rainfall expected in Bengkulu, Lampung, West Java, Central Java, East Java, and East Nusa Tenggara.
Meanwhile, rainfall of moderate to heavy intensity also has potential to occur in several other regions, indicated by yellow warnings on BMKG’s early warning map.
For weather forecasts in major cities, BMKG predicts rainfall accompanied by lightning is likely in Bandar Lampung and Banjarmasin, whilst moderate rainfall is forecast for Bengkulu, Jakarta, Bandung, Semarang, and Tanjung Selor.
Light rainfall is forecast to occur in several cities including Medan, Padang, Pangkal Pinang, Palembang, Serang, Yogyakarta, Surabaya, Pontianak, Samarinda, and Palangka Raya, whilst thick cloudy conditions are expected in Banda Aceh, Tanjung Pinang, Pekanbaru, and Jambi.
In eastern Indonesia, BMKG forecasts rainfall accompanied by lightning is likely in Merauke, moderate rainfall in Kupang, Mamuju, and Makassar, and light rainfall in Denpasar, Mataram, Kendari, Palu, Gorontalo, Manado, Ambon, Ternate, Sorong, Manokwari, Nabire, Jayapura, and Jayawijaya.