Beware of Hydrometeorological Disasters as Extreme Weather Continues to Threaten 24 Districts in Central Java on Monday
Extreme weather continues to pose a threat across 24 districts in Central Java on Monday (9 March), despite high waves in northern waters showing slight improvement compared to previous conditions. Nevertheless, residents are urged to remain vigilant against hydrometeorological disasters.
Morning conditions are expected to be cloudy, but from midday through early evening, light to moderate rainfall is likely to fall throughout Central Java. Extreme weather—including heavy downpours accompanied by strong winds and lightning strikes—still threatens 24 districts, prompting authorities to issue disaster warnings.
High waves in northern waters have begun to ease, with heights of 0.5–1.25 metres, though southern waters of Central Java continue to experience waves of 1.25–2.5 metres, posing significant risks to maritime activities such as fishing vessels, barges, and transport operations, particularly when wind speeds exceed 15 knots.
“Remain vigilant against hydrometeorological disasters resulting from ongoing extreme weather across dozens of districts in Central Java,” said Arif N, weather forecaster at BMKG’s Ahmad Yani Meteorological Station in Semarang on Monday (9 March).
According to Arif, extreme weather is expected in 24 districts across mountainous areas, highland regions, the western section of the northern coast (Pantura), parts of the eastern Pantura, and central Central Java. Other areas are likely to experience light to moderate rainfall over roughly the same period.
The districts in Central Java with the highest risk of extreme weather, according to Arif, are Banyumas, Purbalingga, Banjarnegara, Wonosobo, Mungkid, Boyolali, Klaten, Karanganyar, Sragen, Kudus, Ungaran, Temanggung, Batang, Kajen, Pemalang, Slawi, Brebes, Magelang, Salatiga, Pekalongan, Tegal, Bumiayu, Majenang and Ambarawa.
“Winds will blow from the west to north at speeds of 10–30 kilometres per hour, with air temperatures ranging from 18–32 degrees Celsius and humidity levels between 60–95 per cent,” he added.
Sediyanto, weather forecaster at BMKG’s Tanjung Emas Maritime Station in Semarang, stated that although cloudy conditions and some rainfall are expected across various regions, high waves in several northern water areas including Pekalongan–Kendal, Semarang–Demak, Jepara, Karimunjawa and Pati–Rembang have subsided compared to previous forecasts.
“However, residents engaged in maritime activities are still urged to exercise caution, particularly when wind speeds exceed 15 knots, which poses significant risk,” he said.
Current weather conditions across Indonesia are being influenced by two cyclonic systems monitored in the country’s northern and southern regions.
Residents should remain vigilant as extreme weather can trigger hydrometeorological disasters such as landslides, flooding and whirlwinds.
BMKG issued an ALERT status for extreme weather in East Java on 4 March 2026, warning of very heavy rainfall, strong winds, and the risk of hydrometeorological disasters. The public is advised to increase vigilance against the potential for very heavy rainfall that may be accompanied by lightning and strong winds.
The community is urged to enhance preparedness, particularly for those in areas with the potential for very heavy rainfall.
Current weather conditions across Indonesia are being influenced by two cyclonic systems monitored in the country’s northern and southern regions.
The Batam region, which is an archipelagic area with high maritime mobility, faces weather as one of the important factors requiring attention.
BMKG’s Tenau Maritime Station in Kupang forecasts that wave heights across several waters in East Nusa Tenggara may reach up to 2.9 metres during the period of 8–14 March 2026.
This weather situation, which can change at any time, is expected to be taken into account in planning activities, particularly for land, sea, and air travel, as well as various outdoor activities.
The Meteorological, Climatological and Geophysical Agency (BMKG) warned of the potential for extreme weather in 23 districts across Central Java on Sunday (8 March).