Weather Bulletin on METAREA XI
BMKG Jakarta, Wednesday 17 September 2025 At 0600 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 AT 16.4N 121.3E 1006HPA MAXIMUM WIND 30 KNOT MOVE TO NW TROPICAL LOW AT 13.6N 136.6E 1007HPA MAXIMUM WIND 20 KNOT MOVE TO WNW 

Part II : General Synopsis, Tuesday 16 September 2025 at 12 UTC
SOUTHEASTERLY TO SOUTHWESTERLY GENTLE TO FRESH FLOW IN THE NORTHERN PART OF INDONESIA EASTERLY TO SOUTHEASTERLY GENTLE TO FRESH FLOW IN THE SOUTHERN PART OF INDONESIA 

Part III : Area forecasts to Thursday 18 September 2025 at 06 UTC
MALACCA STRAIT (Southeasterly, 5-9 kt, Slight Sea)
INDIAN OCEAN WESTERN OF ACEH (Northwesterly, 5-17 kt, Moderate Sea)
INDIAN OCEAN WESTERN OF LAMPUNG (Southeasterly, 13-19 kt, Rough Sea)
INDIAN OCEAN SOUTHERN OF JAVA (Southeasterly, 17-19 kt, Rough Sea)
INDIAN OCEAN SOUTHERN OF BALI (Southeasterly, 8-13 kt, Rough Sea)
NORTH NATUNA SEA (Southwesterly, 7-19 kt, Slight Sea)
KARIMATA STRAIT (Northwesterly, 9-14 kt, Moderate Sea)
JAVA SEA (Southeasterly, 7-14 kt, Slight Sea)
MAKASSAR STRAIT (Easterly, 5-16 kt, Slight Sea)
BALI SEA (Easterly, 3-17 kt, Moderate Sea)
SUMBAWA SEA (Southeasterly, 3-12 kt, Moderate Sea)
FLORES SEA (Easterly, 3-15 kt, Slight Sea)
BANDA SEA (Southeasterly, 4-17 kt, Slight Sea)
CERAM SEA (Easterly, 1-13 kt, Slight Sea)
SULAWESI SEA (Easterly, 1-12 kt, Slight Sea)
MOLLUCA SEA (Northerly, 2-15 kt, Slight Sea)
WESTERN PART OF PACIFIC OCEAN (Easterly, 4-12 kt, Slight Sea)
ARAFURA SEA (Southeasterly, 6-17 kt, Slight Sea)