BMKG: Tropical cyclone seed 90S highly likely to develop into a tropical storm

Mataram, West Nusa Tenggara — The Meteorology, Climatology and Geophysics Agency (BMKG) forecasts that the tropical cyclone seed 90S, currently located in the Indian Ocean waters south of Central Java, has a high likelihood of developing into a tropical storm.

“The tropical cyclone seed 90S has a high probability of becoming a tropical cyclone within the next 24 hours,” Ari Wibianto, who chairs the Observation, Data and Information Working Group at the Meteorological Station, said in Mataram, NTB, on Wednesday.

Ari said the weather system is moving eastward and could approach NTB’s southern waters from Thursday night into Friday dawn.

At present, weather conditions in NTB remain relatively clear to cloudy, although there are two tropical cyclone seeds in the Indian Ocean.

The clear to cloudy conditions are influenced by the position of the 90S seed which remains south of Central Java, while the 93S seed remains near the landmass to the northwest of Australia.

“Looking at the upper-layer moisture, it is not very moist. So NTB is currently clear to cloudy,” Ari said.

Based on earlier reports, BMKG forecast extreme weather would strike NTB on 3-8 March 2026 due to the presence of the tropical cyclone seeds 90S in the Indian Ocean south of Java Island and 93S in the Indian Ocean to the northwest of Australia.

The two tropical storm seeds appearing simultaneously contribute to increased supply of moist air and strengthening the growth of rain clouds.

In addition, active atmospheric waves such as Madden-Julian Oscillation (MJO), Low Frequency waves, and Kelvin waves also strengthen the convective processes in West Nusa Tenggara.

BMKG urges the public to heighten vigilance against potential hydrometeorological disasters caused by extreme weather, such as floods, landslides, strong winds, fallen trees, and lightning strikes.