Bulletinset for METAREA 10 Edition date (UTC): 2025-09-17 23:30:01 ============================ HIGH SEAS FORECAST NORTH-EASTERN ============================ FQAU20 AMMC 172100 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 September 2025 Part 1 Warnings Nil. Part 2 Situation at 171800 UTC Southeasterly trade winds. Part 3 Forecast Between lines 03S142E 07S153E 08S170E and 17S142E 21S170E: Southeasterly quarter winds. Wind speeds 15/25 knots, reaching up to 30 knots at times west of line 05S148E 15S148E. Moderate to rough seas. Low to moderate swell. Remainder: Winds not exceeding 20 knots. Slight to moderate seas. Low swell, increasing to low to moderate swell east of line 08S159E 03S159E. Rain areas, scattered showers and isolated thunderstorms mostly north of line 11S142E 13S170E. 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 09:00 UTC Thursday. ============================ HIGH SEAS FORECAST SOUTH-EASTERN ============================ FQAU22 AMMC 172100 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 September 2025 Part 1 Warnings Refer to latest warnings for details of the area affected. Melbourne Hurricane Force Wind Warning 10. Melbourne Gale Warning 11. Melbourne Gale Warning 12. Part 2 Situation at 171800 UTC Cold front [1] near 36S129E 45S140E 50S140E. Forecast near 40S141E 50S152E at 181200UTC, then near 43S152E 46S156E 50S157E at 190000UTC. Forecast cold front [2] entering area from west near 36S126E 39S129E to low 991hPa near 42S130E at 181800UTC, then near 36S132E 40S136E to low 990hPa near 42S135E at 190000UTC. Forecast cold front [3] entering area from west near 41S123E 48S131E 50S131E at 180300UTC, then near 45S139E 50S145E at 190000UTC. Trough [1] near 31S158E 36S166E. Forecast weakening near 29S160E 30S170E at 181800UTC. Trough [2] forecast entering area from west near 45S127E 50S133E at 181800UTC, then near 44S136E 50S136E at 190000UTC. Part 3 Forecast Refer to latest warnings for boundary of affected area and type of weather system. South of line 32S129E 44S161E, outside warning areas: Westerly quarter winds shifting northerly quarter within 480nm east of front [1], northwesterly quarter within 360nm east of front [3], and southwesterly quarter within 480nm west of front [2] and trough [1]. Winds turning clockwise within 120nm of low. 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 to moderate swell, increasing to moderate to heavy south of line 35S166E 38S153E. Rain areas, scattered showers and isolated thunderstorms mostly within 180nm of fronts and troughs, and within 240nm of low. Heavy at times within 120nm of low. 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 09:00 UTC Thursday. ============================ HIGH SEAS FORECAST WESTERN ============================ FQAU23 AMMC 172100 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 September 2025 Part 1 Warnings Refer to latest warnings for details of the area affected. Melbourne Hurricane Force Wind Warning 10. Melbourne Gale Warning 11. Melbourne Gale Warning 12 Part 2 Situation at 171800 UTC Cold front [1] near 41S116E 47S122E 50S122E. Forecast exiting area to east near 41S123E 48S131E 50S131E at 180300UTC. Trough [1] near 35S121E 39S122E. Forecast weakening near 35S128E 39S129E at 180600UTC. Trough [2] near 41S110E 45S106E. Forecast developing into cold front [2] near 37S121E 42S125E at 181200UTC, then exiting area to east near 36S126E 39S129E 42S130E at 181800UTC. Forecast trough [3] approaching area from west near 43S075E 50S084E at 180600UTC, then near 40S080E 46S091E at 190000UTC. Forecast warm front entering area from south near 47S109E 50S108E at 181500UTC, then near 45S117E 50S116E at 190000UTC. Part 3 Forecast Refer to latest warnings for boundary of affected area and type of weather system. South of line 39S080E 34S115E 34S129E, outside warning areas: Westerly quarter winds shifting northwesterly quarter within 240nm east of cold front [1] and within 120nm east of warm front, and shifting southwesterly quarter within 480nm west of trough [2] and cold front [2]. Wind speeds 20/33 knots. Rough to very rough seas. Moderate to heavy swell. West of line 15S100E 21S115E 27S115E: Southeasterly quarter winds 20/30 knots. Rough to very rough seas. Low to moderate swell. Remainder: Winds not exceeding 25 knots. Moderate to rough seas. Low to moderate swell, increasing to moderate to heavy south of line 28S094E 28S116E. Rain areas, scattered showers and isolated thunderstorms mostly within 180nm of fronts and troughs, and north of line 23S090E 23S107E. 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 09:00 UTC Thursday. ============================ HIGH SEAS FORECAST NORTHERN ============================ FQAU21 AMMC 172015 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 SEPTEMBER 2025 PART 1 WARNINGS NIL. PART 2 SITUATION AT 171800 UTC SOUTHEASTERLY TRADE WINDS. PART 3 FORECAST SOUTH OF LINE 05S090E 05S104E 09S109E: SOUTHEASTERLY QUARTER WINDS 15/25 KNOTS. MODERATE TO ROUGH SEAS. LOW TO MODERATE SWELL. EAST OF LINE 08S138E 11S138E: SOUTHEASTERLY QUARTER WINDS. WIND SPEEDS BELOW 20 KNOTS INITIALLY, INCREASING TO 15/25 KNOTS FROM 181200UTC. MODERATE TO ROUGH SEAS. LOW SWELL. REMAINDER: WINDS NOT EXCEEDING 20 KNOTS. SLIGHT TO MODERATE SEAS. LOW SWELL, INCREASING TO LOW TO MODERATE WEST OF LINE EQ098E 05S104E 12S126E. RAIN AREAS, SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS THROUGHOUT MOSTLY NORTH OF LINES 07S090E 07S114E AND 03S125E 10S142E. 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 08:15 UTC THURSDAY.=