TEMPO.CO, Jakarta - The Meteorology, Climatology, and Geophysics Agency (BMKG) said the cyclone seed 93S that was detected on Thursday, December 11, in the Indian Ocean south of West Nusa Tenggara (NTB), is moving away from Indonesia. But the wind vortex could still prompt moderate to heavy rainfall across several regions for the next few days.
The Head of BMKG Teuku Faisal Fathani stated that 93S has caused several regions, including Bali, NTB, and East Nusa Tenggara (NTT), to be showered with moderate to heavy rain. The cyclone seed also triggered 1.25-2.5 meters high waves in the Indian Ocean south of East Java to NTT, the waters south of East Java, and the southern part of Bali-Lombok-Alas Strait.
"Indirect impact potential of moderate to heavy rain and high waves must still be anticipated. Let's stay calm, but remain vigilant," said Faisal in a written statement on Thursday, December 11, 2025.
Based on BMKG's analysis, wind speeds around 93S reach 15 knots or 28 kilometers per hour, with a minimum pressure of 1009 hPa. This observation indicates that the convective clouds around 93S are not well-organized, so it is projected to strengthen slowly over the next 24 hours.
BMKG's Deputy of Meteorology Guswanto said the 93S cyclone seed is likely to maintain a persistent intensity for the next 24 hours, while slowly moving southwestward away from Indonesia. Meanwhile, for the next 48-72 hours, the system is projected to gradually increase in intensity as the circulation pattern improves.
"This system is slowly moving away from the Indonesian region and is projected not to have a direct impact on the mainland," said Guswanto.
Upon reexamination, 93S began to form on December 11, 2025, at 07:00 a.m. Western Indonesian Time. Its circulation center is around 12 degrees south latitude and 117 degrees east longitude, within the Tropical Cyclone Warning Centre (TCWC) observation areas.
The Director of Public Meteorology at BMKG, Andri Ramdhani, reminded residents living in coastal areas, as well as flood and landslide-prone areas, to be more vigilant. Shipowners and passenger ship operators must also pay attention to the sea conditions.
"Avoid spreading fearmongering information. It is advised to always refer to BMKG's official channels to ensure that preventive measures are taken accurately and effectively," said Andri.
Read: BMKG Details Impact of Cyclone Seed 91S on Sumatra Weather
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