The National Disaster Management Agency (BNPB) has raised concerns about an increased likelihood of moderate to heavy rainfall across Indonesia, especially in Bali, Papua, and other eastern regions, over the coming week. The agency urges locals and tourists to stay alert, as these changing conditions could cause major disruptions.
Abdul Muhari, the Head of BNPB’s Data, Information, and Communication Center, explained that the expected rainfall is due to various atmospheric factors, including the Madden-Julian Oscillation (MJO), Rossby waves, and Kelvin waves. These weather systems are shifting from western to central and eastern parts of Indonesia. According to the Meteorological, Climatological, and Geophysical Agency (BMKG), these phenomena are expected to be most active between December 10 and 11, 2024, particularly in regions like Maluku, North Maluku, East Nusa Tenggara, and Papua.
The BNPB specifically highlighted the intensifying weather in Bali, where conditions are predicted to deteriorate after December 12. The Kelvin wave is expected to affect eastern Sulawesi, Maluku, North Maluku, Bali, East Nusa Tenggara, and Papua. This system will not only bring heavy rains but also strong winds and lightning, increasing land and sea travel risks.
High wave warnings
Bali’s coastal areas are also under a high-wave warning. The Bali Meteorological, Climatological, and Geophysics Office (BBMKG) predicts waves up to 2.5 meters along the island’s southern coastline through Thursday. The strongest winds are forecast to affect the southern waters, particularly in the Bali and Lombok Strait, where wind speeds could range from 4 to 15 knots, with gusts in some areas.
BBMKG has warned about hazardous maritime navigation conditions, particularly in the southern Bali Strait, Badung Strait, and Lombok Strait. Fishing boats, small vessels, and larger ships are vulnerable to the high waves and gusty winds. Local fishermen and tourists are advised to stay off the sea during this period.
The agency also noted that the combined threats of high waves, strong winds, and heavy rains could disrupt marine traffic. Fishing boats may struggle when winds exceed 15 knots and waves reach 1.25 meters. Larger tugboats may face difficulties with winds over 16 knots and waves up to 1.5 meters.
Authorities are asking residents and visitors to stay informed and take precautions during this unsettled weather. The mix of rain, wind, and high waves will pose challenges for those in or traveling to affected regions. The BNPB and BMKG will continue to monitor the situation and issue updates as necessary.
The public is urged to be cautious as conditions worsen in Bali, Papua, and eastern Indonesia. Flooding, landslides, and hazardous sea conditions are possible, and cooperation is essential for safety during this period of unstable weather.