BADAN METEOROLOGI,
KLIMATOLOGI DAN GEOFISIKA
Indonesian Weather Bulletin for Shipping
( Metarea XI)
BMKG Jakarta, Wednesday 23 April 2025 At 1430 UTC
Part I : Warning
TROPICAL LOW 97S AT 8.1°S 131.9°E 1008 HPA MAXIMUM WINDS 20 KNOTS MOVE TO NW
Part II : General Synopsis
Wednesday 23 April 2025 at 00 UTC NORTHWESTERLY TO NORTHEASTERLY LIGHT TO GENTLE FLOW IN THE NORTHERN PART OF INDONESIA SOUTHWESTERLY TO NORTHWESTERLY GENTLE TO MODERATE FLOW IN THE SOUTHERN PART OF INDONESIA
Part III : Area Forecasts
Valid until Thursday 24 April 2025 at 15 UTC
MALACCA STRAIT
Northwesterly
5-19 kt
Moderate Sea
INDIAN OCEAN WESTERN OF ACEH
Northwesterly
1-22 kt
Rough Sea
INDIAN OCEAN WESTERN OF LAMPUNG
Northwesterly
6-16 kt
Moderate Sea
INDIAN OCEAN SOUTHERN OF JAVA
Westerly
1-15 kt
Moderate Sea
INDIAN OCEAN SOUTHERN OF BALI
Easterly
1-23 kt
Moderate Sea
NORTH NATUNA SEA
Northerly
2-24 kt
Slight Sea
KARIMATA STRAIT
Northerly
0-21 kt
Slight Sea
JAVA SEA
Northeasterly
1-20 kt
Slight Sea
MAKASSAR STRAIT
Westerly
1-15 kt
Slight Sea
BALI SEA
Northwesterly
2-14 kt
Slight Sea
SUMBAWA SEA
Northwesterly
0-17 kt
Slight Sea
FLORES SEA
Westerly
1-16 kt
Slight Sea
BANDA SEA
Westerly
0-31 kt
Moderate Sea
CERAM SEA
Westerly
0-28 kt
Moderate Sea
SULAWESI SEA
Westerly
3-24 kt
Moderate Sea
MOLLUCA SEA
Westerly
1-29 kt
Moderate Sea
WESTERN PART OF PACIFIC OCEAN
Northwesterly
0-30 kt
Moderate Sea
ARAFURA SEA
Northerly
3-29 kt
Slight Sea
⚠️ Important Notes
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
Reference Scales
Beaufort Wind Scale
| Force | Description | Speed (knots) |
|---|---|---|
| 0 | Calm | < 1 |
| 1 | Light air | 1-3 |
| 2 | Light breeze | 4-6 |
| 3 | Gentle breeze | 7-10 |
| 4 | Moderate breeze | 11-16 |
| 5 | Fresh breeze | 17-21 |
| 6 | Strong breeze | 22-27 |
| 7 | Near gale | 28-33 |
| 8 | Gale | 34-40 |
| 9 | Strong gale | 41-47 |
Douglas Sea Scale
| Grade | Description | Height (m) |
|---|---|---|
| 0 | Calm (Glassy) | 0 |
| 1 | Calm (Rippled) | 0-0.1 |
| 2 | Smooth | 0.1-0.5 |
| 3 | Slight | 0.5-1.25 |
| 4 | Moderate | 1.25-2.5 |
| 5 | Rough | 2.5-4 |
| 6 | Very rough | 4-6 |
| 7 | High | 6-9 |
| 8 | Very high | 9-14 |
| 9 | Phenomenal | >14 |
KONTAK KAMI :
Jl. Angkasa I No.2 Kemayoran, Jakarta Pusat 10610, PO Box 3540 Jkt.
Call Center (021) 196
Fax (021) 4246703
cc196@bmkg.go.id
TAUTAN :
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