FQAU23 AMMC 212000

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 21 October 2025



Part 1 Warnings

Refer to latest warnings for details of the area affected.



Final Melbourne Gale Warning 7.



Part 2 Situation at 211800 UTC

Trough [1] near 35S100E 46S107E 50S106E. Forecast near 32S104E 41S110E at

221200UTC, and weakening thereafter.



Trough [2] near 38S090E 43S095E 49S091E. Forecast near 32S109E 37S111E to

developing low 1006hPa near 40S108E at 230000UTC.



Trough [3] forecast to enter area near 46S080E 50S083E at 230000UTC.



Part 3 Forecast

Refer to latest warnings for boundary of affected area and type of weather

system.



South of line 39S080E 36S106E, outside warning areas:

Northwesterly quarter winds tending southwesterly quarter within 240nm west of

troughs, turning clockwise within 120nm of low. Wind speeds 25/33 knots. Rough

to very rough seas. Moderate to heavy swell.



West of line 12S099E 16S090E:

Southeasterly quarter winds 20/30 knots. Rough seas. Low to moderate swell.



South of line 47S121E 42S129E:

Southwesterly quarter winds 20/30 knots. Rough seas. Moderate to heavy swell.



Remainder:

Winds not exceeding 25 knots. Moderate to rough seas. Low to moderate swell.



Rain areas, scattered showers and isolated thunderstorms mostly within 180nm of

troughs. 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 Wednesday.