Weather Bulletin on METAREA XI
BMKG Jakarta, Wednesday 21 January 2026 At 1800 UTC
Wind speed in DOUGLAS SCALE 
Sea state in DOUGLAS SCALE 
Please be aware, wind gusts can be a further 40 percent stronger than the averages given here, and maximum waves may be up to twice the significant height 

Part I : Warning TROPICAL LOW 97S NEAR 12.2°S 121.0°E 1003HPA MAXIMUM WINDS 15KT, MOVING SWW TROPICAL LOW 91S NEAR 10.3°S 116.1°E 1009HPA MAXIMUM WINDS 15KT 

Part II : General Synopsis, Wednesday 21 January 2026 at 00 UTC
NORTHWESTERLY TO NORTHEASTERLY GENTLE TO FRESH FLOW IN THE NORTHERN PART OF INDONESIA WESTERLY TO NORTHWESTERLY MODERATE TO STRONG FLOW IN THE SOUTHERN PART OF INDONESIA 

Part III : Area forecasts to Thursday 22 January 2026 at 18 UTC
MALACCA STRAIT (Northerly, 2-7 kt, Slight Sea)
INDIAN OCEAN WESTERN OF ACEH (Northwesterly, 0-16 kt, Moderate Sea)
INDIAN OCEAN WESTERN OF LAMPUNG (Westerly, 15-23 kt, Rough Sea)
INDIAN OCEAN SOUTHERN OF JAVA (Westerly, 11-23 kt, Rough Sea)
INDIAN OCEAN SOUTHERN OF BALI (Westerly, 5-30 kt, Rough Sea)
NORTH NATUNA SEA (Northeasterly, 12-22 kt, Rough Sea)
KARIMATA STRAIT (Northerly, 13-19 kt, Moderate Sea)
JAVA SEA (Northwesterly, 12-26 kt, Moderate Sea)
MAKASSAR STRAIT (Northwesterly, 10-26 kt, Moderate Sea)
BALI SEA (Westerly, 18-26 kt, Moderate Sea)
SUMBAWA SEA (Northwesterly, 20-29 kt, Moderate Sea)
FLORES SEA (Westerly, 2-26 kt, Moderate Sea)
BANDA SEA (Northwesterly, 1-20 kt, Moderate Sea)
CERAM SEA (Northwesterly, 1-19 kt, Moderate Sea)
SULAWESI SEA (Northerly, 2-20 kt, Moderate Sea)
MOLLUCA SEA (Northerly, 2-20 kt, Moderate Sea)
WESTERN PART OF PACIFIC OCEAN (Northwesterly, 13-20 kt, Moderate Sea)
ARAFURA SEA (Westerly, 14-28 kt, Rough Sea)