BMKG: Extreme Weather Threatens 9 Areas in Central Java Until Thursday Morning

Extreme weather is anticipated in nine Central Java regions until Thursday morning, with high waves and coastal flooding still ongoing in waters; residents are urged to be vigilant against hydro-meteorological disasters such as landslides, floods, and whirlwinds. From Wednesday night (27 May) to early Thursday morning (28 May), skies will generally be cloudy, with light to moderate rain expected to fall unevenly across Central Java. Extreme weather, including heavy rain accompanied by strong winds and lightning, is possible in nine regions, particularly in mountainous and highland areas. High waves of 1.25-2.5 metres are continuing in southern waters and 1-1.25 metres in northern waters, while high tides from 14:00 to 17:00 WIB have caused flooding in several Central Java coastal areas including Pekalongan, Batang, Kendal, Demak, Jepara, and Pati. ‘Residents should be cautious of hydro-meteorological disasters due to extreme weather in the nine Central Java regions, especially during the night and early morning,’ said BMKG Ahmad Yani Semarang Meteorological Station forecaster Agus Triyono on Wednesday (27 May) evening. Areas likely to experience extreme weather from Wednesday night (27 May) to Thursday morning (28 May), according to Agus Triyono, are Purbalingga, Banjarnegara, Wonosobo, Boyolali, Karanganyar, Temanggung, Kajen, Pekalongan, and Tegal, while other parts of Central Java may see light to moderate rain. According to Agus Triyono, winds are blowing from the northeast to southwest at 3-20 km/h, with temperatures ranging from 14 to 30 degrees Celsius and humidity between 75% and 95%. Residents in hill slopes and river basin areas are advised to remain vigilant for hydro-meteorological disasters. BMKG Tanjung Emas Semarang Maritime Station forecaster Wahyu Sri Mulyani stated that the ongoing high waves in southern Central Java waters pose risks to maritime activities such as fishing boats, barges, and cargo and passenger transport, particularly when wind speeds exceed 15 knots. Meanwhile, high tides (rob) in northern Central Java waters, added Wahyu Sri Mulyani, have caused flooding in several coastal areas until Thursday night (27 May), disrupting residents’ activities such as transportation, port cargo handling, and inland fisheries and salt farming. Meanwhile, 20 hotspots were detected in Riau, spread across six districts, with Siak Regency recording the highest number at six. BMKG recorded maximum temperatures exceeding 35 degrees Celsius in several regions including Aceh, Riau, Bali, Kalimantan, Central Sulawesi, West Papua, and East Java. BMKG issued a weather warning for Wednesday, 27 May 2026. Caution is advised for potential heavy rain with lightning from Surabaya to Manokwari. BMKG reported that Jakarta’s weather on 27 May 2026 was dominated by thick clouds, with a temperature of 24 degrees Celsius in the Gambir area and surroundings. BMKG Regional Office I forecaster Endah Paramitha in Medan said on Tuesday that North Sumatra’s weather on Wednesday (27 May) morning was forecast to be partly cloudy. Prolonged heavy rain can lead to insufficient water absorption into the ground, potentially triggering landslides. Local officials must demonstrate high initiative and rapid response to issues arising in their respective areas. PLN confirmed that widespread power outages in Sumatra were caused by severe weather disrupting transmission. Restoration of power generation is being carried out progressively. BMKG issued an extreme weather warning for 18 regions in Central Java today. Residents are also urged to be cautious of coastal flooding and high waves. The developer of Puri Harmoni 8 Housing in Parung Panjang, Bogor Regency, stated it is continuing mitigation efforts against potential flooding in the area.