Bulletinset for METAREA 10 Edition date (UTC): 2025-12-23 04:23:20 ============================ TROPICAL CYCLONE WARNING PERTH ============================ WTAU06 APRF 230059 IDW23200 40:2:2:24:13S100E999:11:00 SECURITE OCEAN WIND WARNING FOR METAREA 10 Issued by the Australian Bureau of Meteorology Tropical Cyclone Warning Centre at 0059 UTC 23 DECEMBER 2025 STORM FORCE WIND 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 0000 UTC Tropical Cyclone Grant was centred within 20 nautical miles of latitude twelve decimal eight south (12.8S) longitude one hundred decimal four east (100.4E) Recent movement : west at 4 knots Maximum winds : 35 knots Central pressure: 995 hPa The low is expected to develop into a tropical cyclone in the next 12 hours. AREA AFFECTED Within 60 nautical miles in SE quadrant and within 60 nautical miles in SW quadrant and within 50 nautical miles in NW quadrant and within 50 nautical miles in NE quadrant. FORECAST Maximum winds to 35 knots near the centre increasing to 50 knots by 0000 UTC 24 December. Winds above 48 knots within 25 nautical miles of the centre after 1800 UTC 23 December with very rough seas and moderate swell. Winds above 34 knots within 60 nautical miles in SE quadrant and within 60 nautical miles in SW quadrant and within 50 nautical miles in NW quadrant and within 50 nautical miles in NE quadrant with rough seas and moderate swell. Forecast positions At 1200 UTC 23 December: Within 40 nautical miles of 12.6 south 99.5 east Central pressure 990 hPa. Winds to 45 knots At 0000 UTC 24 December: Within 55 nautical miles of 12.3 south 98.7 east Central pressure 986 hPa. Winds to 50 knots 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 0700 UTC 23 December 2025. AUSTRALIAN BUREAU OF METEOROLOGY TROPICAL CYCLONE WARNING CENTRE ============================ HIGH SEAS FORECAST SOUTH-EASTERN ============================ FQAU22 AMMC 222000 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 22 December 2025 Part 1 Warnings Refer to latest warnings for details of the area affected. Melbourne Gale Warning 12. Part 2 Situation at 221800 UTC Trough near 41S149E 44S154E. Forecast near 40S158E 43S161E to low [1] 990hPa near 46S159E at 230600UTC, then exiting east of area. Trough [2] near 32S154E 37S166E. Forecast near 27S153E 33S168E at 240000UTC. Forecast cold front entering from west of area near 45S129E 48S135E 50S135E at 230000UTC, near 42S161E 47S158E 50S152E to developing low [2] 982hPa near 49S148E at 240000UTC. Part 3 Forecast Refer to latest warnings for boundary of affected area and type of weather system. South of line 41S163E 32S154E 38S144E 40S129E, outside warning areas: Westerly quarter winds shifting northwesterly east of cold front/troughs, southwesterly quarter west of cold front, southerly quarter south of troughs, and clockwise within 120nm of lows. Wind speeds 20/33 knots. Rough to very rough seas. Moderate to heavy swell. Remainder: Winds not exceeding 25 knots. Moderate to rough seas. Low swell to moderate swell, increasing to moderate to heavy south of line 33S129E 38S142E. Rain areas, scattered showers and isolated thunderstorms mostly within 120nm front and troughs, heavy at times within 60nm of trough [2]. 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 Tuesday. ============================ HIGH SEAS FORECAST WESTERN ============================ FQAU23 AMMC 222000 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 22 December 2025 Part 1 Warnings Refer to latest warnings for details of the area affected. Gale Warning issued by TCWC Melbourne for Tropical Cyclone 03U. Melbourne Gale Warning 12. Part 2 Situation at 221800 UTC Tropical Low (03U) 998hPa near 12.8S100.7E. Forecast intensifying to tropical cyclone 987hPa near 12.2S098.7E at 240000UTC. Cold front near 46S124E 50S128E. Forecast exiting east of area at 230000UTC. Forecast cold front [2] near 38S080E to low 1005hPa near 47S089E developing at 230600UTC, near 42S093E 50S101E to low south of area at 240000UTC. Part 3 Forecast Refer to latest warnings for boundary of affected area and type of weather system. Within 180nm of Tropical Low/Cyclone 03U, outside of warning area: Clockwise winds around tropical low/cyclone. Wind speeds 20/33 knots. Rough to very rough seas. Moderate swell. East of line 28S109E 36S113E: Southeasterly quarter winds 20/30 knots. Rough seas. Low to moderate swell. South of line 37S080E 41S094E 48S111E 40S129E, outside warning areas: Westerly quarter winds, shifting northwesterly quarter within 300nm east of cold fronts, southwesterly quarter within 300nm west of cold fronts and clockwise within 180nm of low. Wind speeds 20/33 knots. Rough to very rough seas. Moderate to heavy swell. Remainder: Winds not exceeding 25 knots. Slight to moderate seas. Low to moderate swell, increasing to moderate to heavy east of line 34S122E 45S119E. Rain areas, scattered showers and isolated thunderstorms mostly within 180nm of fronts and within 240nm of lows. Heavy at times within 120nm of tropical low/cyclone. 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 Tuesday. ============================ HIGH SEAS FORECAST NORTH-EASTERN ============================ FQAU20 AMMC 222000 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 22 December 2025 Part 1 Warnings Nil. Part 2 Situation at 221800 UTC Trough near EQ156E 10S167E. Forecast near EQ150E 13S167E at 240000UTC. Part 3 Forecast Whole area: Winds not exceeding 20 knots. Slight to moderate seas. Low swell. Rain areas, isolated showers and isolated thunderstorms mostly within 240nm NE of trough. 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 Tuesday. ============================ HIGH SEAS FORECAST NORTHERN ============================ FQAU21 AMMC 221915 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 22 DECEMBER 2025 PART 1 WARNINGS REFER TO LATEST WARNINGS FOR DETAILS OF THE AREA AFFECTED. GALE WARNING ISSUED BY TCWC MELBOURNE FOR TROPICAL LOW 03U. PART 2 SITUATION AT 221800 UTC TROPICAL LOW/CYCLONE (03U) 998HPA NEAR 12.8S100.7E. FORECAST INTENSIFYING TO TROPICAL CYCLONE 987HPA NEAR 12.2S098.7E AT 240000UTC. TROUGH NEAR 03S096E 12S101E. FORECAST TROUGH NEAR 02S094E 12S099E AT 231200UTC. PART 3 FORECAST REFER TO LATEST WARNINGS FOR BOUNDARY OF AFFECTED AREA AND TYPE OF WEATHER SYSTEM. WITHIN 180NM OF TROPICAL LOW/CYCLONE, OUTSIDE WARNING AREA: CLOCKWISE WINDS AROUND TROPICAL LOW/CYCLONE. WIND SPEEDS 20/33 KNOTS. ROUGH TO VERY ROUGH SEAS. MODERATE SWELL. REMAINDER: WINDS NOT EXCEEDING 20 KNOTS. SLIGHT TO MODERATE SEAS. LOW SWELL. RAIN AREAS, SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS THROUGHOUT AREA. HEAVY AT TIMES WITHIN 180NM OF TROPICAL LOW/CYCLONE. 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 TUESDAY.=