Bulletinset for METAREA 10 Edition date (UTC): 2025-12-17 22:54:16 ============================ TROPICAL CYCLONE WARNING PERTH ============================ WTAU05 APRF 171840 IDW23100 40:2:2:24:11S091E999:11:00 SECURITE OCEAN WIND WARNING FOR METAREA 10 Issued by the Australian Bureau of Meteorology Tropical Cyclone Warning Centre at 1840 UTC 17 DECEMBER 2025 GALE WARNING 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 height. SITUATION At 1800 UTC Ex-Tropical Cyclone Bakung was centred within 30 nautical miles of latitude eleven decimal one south (11.1S) longitude ninety one decimal one east (91.1E) Recent movement : west northwest at 8 knots Maximum winds : 35 knots Central pressure: 1001 hPa AREA AFFECTED Within 40 nautical miles of the centre. FORECAST Maximum winds to 35 knots near the centre easing to 30 knots by 1800 UTC 18 December. Winds above 34 knots within 40 nautical miles in SW quadrant with very rough seas and moderate. Forecast positions At 0600 UTC 18 December: Within 55 nautical miles of 10.5 south 90.2 east Central pressure 1000 hPa. Winds to 30 knots near centre. At 1800 UTC 18 December: Within 70 nautical miles of 9.4 south 89.2 east Central pressure 1003 hPa. Winds to 30 knots near centre. REMARKS All ships in the area please send weather reports every three hours. Regular weather observing ships use normal channels. Other ships please use email to tcwc@bom.gov.au. Next warning will be issued by 0100 UTC 18 December 2025. AUSTRALIAN BUREAU OF METEOROLOGY TROPICAL CYCLONE WARNING CENTRE ============================ HIGH SEAS FORECAST SOUTH-EASTERN ============================ FQAU22 AMMC 172000 IDY10210 SECURITE High Seas Forecast for South Eastern METAREA 10 SOUTH EASTERN AREA: COAST AT 25S TO 25S170E TO 29S170E TO 45S160E TO 50S160E TO 50S129E TO COAST AT 129E Issued by the Australian Government Bureau of Meteorology For 24 hours commencing 2300 UTC 17 December 2025 Part 1 Warnings Refer to latest warnings for details of the area affected. Nil. Part 2 Situation at 171800 UTC Cold front 45S142E 48S154E 50S160E. Forecast 44S161E 48S172E 51S174E at 181200UTC, east of area. Trough 38S130E 42S136E 44S142E. Forecast trough 38S130E 42S136E 44S142E at 190000UTC. Part 3 Forecast Refer to latest warnings for details of the area affected. West of line 39S146E 45S147E: Southeasterly quarter winds within 180nm southwest of trough. Wind speeds 20/33 knots. Moderate to rough seas. Moderate swell. South of line:48S150E 48S160E: Southwesterly quarter winds southwest of cold front. Wind speeds 20/33 knots. Moderate to rough seas. Moderate swell. Remainder: Winds not exceeding 25 knots. Sea fog possible within 40S140E 45S140E 45S146E 40S144E 40S140E until 180300UTC. Slight to moderate seas. Low to moderate swell. Rain areas, scattered showers and isolated thunderstorms mostly within 240nm. Visibility reducing below 2nm in precipitation and sea fog. Please be aware Wind and wave forecasts are averages. Wind gusts can be 40 per cent stronger than the forecast, and stronger still in squalls and thunderstorms. Maximum waves can be twice the forecast height. WEATHER MELBOURNE The next routine forecast will be issued at 08:00 UTC Thursday. ============================ HIGH SEAS FORECAST WESTERN ============================ FQAU23 AMMC 172000 IDY10220 SECURITE High Seas Forecast for Western METAREA 10 12S TO 30S BETWEEN 90E AND 125E, AND 30S TO 50S BETWEEN 80E AND 129E Issued by the Australian Government Bureau of Meteorology For 24 hours commencing 2300 UTC 17 December 2025 Part 1 Warnings Refer to latest warnings for details of the area affected. Gale Warning issued by TCWC for Tropical Cyclone "Bakung". Melbourne Gale Warning 9. Part 2 Situation at 171800 UTC Tropical Cyclone 'Bakung' 997hPa near 11.4S091.4E. Forecast Tropical Cyclone 'Bakung' 1005hPa near 8.8S088.9E at 190000UTC. Tropical Low (03U) 1000hPa near 12.9S112.3E. Forecast low 1000hPa near 13.0S110.3E at 190000UTC. Cold front 40S080E 50S100E. Forecast 36S102E 41S112E 50S118E at 190000UTC. Forecast warm front near 49S077E 54S073E 55S060E at 181500UTC, entering from west, then near 48S089E 54S083E 58S071E at 190000UTC. Part 3 Forecast Refer to latest warnings for details of the area affected. North of 16S, outside warning areas: Clockwise winds 20/33 knots within 240nm of Tropical Cyclone 'Bakung' and 20/30 knots within 240nm of Tropical Low (03U). Rough seas. Low to moderate swell. South of line 43S080E 41S097E 48S125E: Northwesterly quarter winds east of front [2], shifting westerly quarter within 960nm west of front, shifting northwesterly quarter northwest of warm front. Wind speeds 20/33 knots. Moderate to rough seas. Moderate to heavy swell. Area enclosed by 22S115E 22S108E 35S112E 35S116E, outside warning area: Southeasterly quarter winds. Wind speed 20/33 knots. Moderate to rough seas. Moderate swell. Remainder: Winds not exceeding 25 knots. Slight to moderate seas. Low to moderate swell. Rain areas, scattered showers and isolated thunderstorms mostly within 240nm of fronts and lows. Visibility reducing below 2nm in precipitation. Please be aware Wind and wave forecasts are averages. Wind gusts can be 40 per cent stronger than the forecast, and stronger still in squalls and thunderstorms. Maximum waves can be twice the forecast height. WEATHER MELBOURNE The next routine forecast will be issued at 08:00 UTC Thursday. ============================ HIGH SEAS FORECAST NORTH-EASTERN ============================ FQAU20 AMMC 172000 IDY10230 SECURITE High Seas Forecast for North Eastern METAREA 10 NORTHEASTERN AREA: EQUATOR TO 25S, 142E TO 170E Issued by the Australian Government Bureau of Meteorology For 24 hours commencing 2300 UTC 17 December 2025 Part 1 Warnings Nil. Part 2 Situation at 171800 UTC Trough near 01S144E 10S156E 13S170E. Forecast slow moving. Part 3 Forecast South of line 18S148E 18S170E: Southeasterly quarter winds 15/25 knots. Moderate to rough seas. Low to moderate swell. Remainder: Winds not exceeding 20 knots. Slight to moderate seas. Low swell. Rain areas, isolated showers and isolated thunderstorms mainly north of 21S. Heavy at times within 60nm of trough and east of 164E. Visibility reducing below 2nm in precipitation. Please be aware Wind and wave forecasts are averages. Wind gusts can be 40 per cent stronger than the forecast, and stronger still in squalls and thunderstorms. Maximum waves can be twice the forecast height. WEATHER MELBOURNE The next routine forecast will be issued at 08:00 UTC Thursday. ============================ HIGH SEAS FORECAST NORTHERN ============================ FQAU21 AMMC 171915 40:2:1:31:11:01:00 IDY10240 SECURITE HIGH SEAS FORECAST FOR NORTHERN METAREA 8/10/11 NORTHERN AREA: EQUATOR TO 12S, 90E TO 142E AND SOUTHWARD TO COAST, 125E TO 142E ISSUED BY THE AUSTRALIAN GOVERNMENT BUREAU OF METEOROLOGY FOR 24 HOURS COMMENCING 2300 UTC 17 DECEMBER 2025 PART 1 WARNINGS REFER TO LATEST WARNINGS FOR DETAILS OF THE AREA AFFECTED. GALE WARNING ISSUED BY TCWC FOR TROPICAL CYCLONE "BAKUNG". PART 2 SITUATION AT 171800 UTC TROPICAL CYCLONE 'BAKUNG' 997HPA NEAR 11.4S091.4E. FORECAST TROPICAL CYCLONE 'BAKUNG' 1005HPA NEAR 8.8S088.9E AT 190000UTC. TROPICAL LOW (03U) 1000HPA NEAR 12.9S112.3E. FORECAST LOW 1000HPA NEAR 13.0S110.3E AT 190000UTC. TROPICAL LOW (07U) 1004HPA NEAR 09S136E. FORECAST 1006HPA NEAR 13S137E AT 190000UTC. PART 3 FORECAST REFER TO LATEST WARNINGS FOR DETAILS OF THE AREA AFFECTED. WHOLE AREA, OUTSIDE WARNING AREAS: CLOCKWISE WINDS 20/33 KNOTS WITHIN 240NM OF TROPICAL CYCLONE 'BAKUNG' AND 20/30 KNOTS WITHIN 240NM OF TROPICAL LOW (03U) AND 20/30 KNOTS WITHIN 120NM OF TROPICAL LOW (07U). ROUGH SEAS. LOW TO MODERATE SWELL. REMAINDER: WINDS NOT EXCEEDING 20 KNOTS. SLIGHT TO MODERATE SEAS. LOW SWELL. RAIN AREAS, SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS THROUGHOUT, HEAVY AT TIMES WITHIN 180NM OF LOWS. VISIBILITY REDUCING BELOW 2NM IN PRECIPITATION. PLEASE BE AWARE WIND AND WAVE FORECASTS ARE AVERAGES. WIND GUSTS CAN BE 40 PER CENT STRONGER THAN THE FORECAST, AND STRONGER STILL IN SQUALLS AND THUNDERSTORMS. MAXIMUM WAVES CAN BE TWICE THE FORECAST HEIGHT. WEATHER MELBOURNE THE NEXT ROUTINE FORECAST WILL BE ISSUED AT 07:15 UTC THURSDAY.=