Weather Forecast for 2 June: Two Cyclonic Circulations Active in the North, West Java on Alert for Very Heavy Rain
The Meteorology, Climatology, and Geophysics Agency (BMKG) has issued a weather forecast for Tuesday, 2 June 2026. Based on current atmospheric dynamics analysis, the formation of cyclonic circulations in northern Nusantara has extended wind convergence zones, potentially increasing rain cloud development across several Indonesian regions.
Hazy: Bengkulu
Cloudy/Overcast: Banda Aceh, Pekanbaru, Padang, Jambi, Palembang, Bandar Lampung
Light rain: Medan, Tanjung Pinang, Pangkalpinang
Hazy: Surabaya
Cloudy/Overcast: Jakarta, Yogyakarta, Semarang
Light rain: Serang
Thunderstorms: Bandung
Smoke/Haze: Mataram
Partly cloudy/Cloudy: Denpasar, Kupang
Cloudy: Pontianak
Light rain: Banjarmasin, Palangkaraya, Samarinda
Thunderstorms: Tanjung Selor
Partly cloudy/Cloudy: Makassar, Gorontalo
Light rain: Manado, Mamuju, Kendari
Thunderstorms: Palu
Partly cloudy/Cloudy: Ternate, Manokwari, Jayapura, Merauke
Light rain: Ambon, Sorong, Nabire, Jayawijaya
Recent weather monitoring shows cyclonic circulations forming in the South China Sea and North Pacific Ocean off Papua. This system is actively creating convergence zones around its centre, extending towards the North Pacific Ocean off Papua.
Additionally, secondary convergence zones are forecasted over:
Aceh
Riau
Indian Ocean west of Banten
Java Sea
Karimata Strait
Kalimantan regions (South, Central, East)
This convergence belt is also observed along the southern coast of Southeast Sulawesi to Bone Bay, Maluku Sea, western coast of North Maluku, and western coast of West Papua. The accumulation of moist air along these paths significantly increases atmospheric instability, supporting substantial convective rain cloud development.
The combination of these atmospheric phenomena poses significant weather potential in several areas. BMKG urges the public to prepare for potential heavy to very heavy rainfall in West Java. Residents in West Java are advised to remain vigilant against extreme weather impacts such as flooding, flash floods, and sudden strong winds.