FQAU23 AMMC 232100

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 23 July 2025



Part 1 Warnings

Refer to latest warnings for details of the area affected.



Melbourne Gale Warnings 12.



Part 2 Situation at 231800 UTC

Cold front [1] near 46S129E 22S112E. Forecast near 36S126E 40S129E at

240900UTC, and east of area thereafter.



Cold front [2] forecast to enter area from the west near 45S080E 47S084E at

241200UTC. Forecast near 40S080E 44S090E 50S099E at 250000UTC.



Trough near 19S107E 22S112E. Forecast trough near 14S114E 18S120E 19S121E at

241200UTC, weakening thereafter.



Low 995hPa near 36S121E. Forecast low 995hPa near 34S128E at 241500UTC, and

east of area thereafter.



Part 3 Forecast

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

system.



South of line 48S129E 35S080E, outside warning areas:

Westerly quarter winds 20/33 knots, shifting northwesterly quarter within 420nm

east of cold front [2]. Rough to very rough seas. Moderate to heavy swell,



East of line 42S114E 20S099E, outside warning areas:

Southerly quarter winds 20/33 knots, shifting northwesterly quarter within

300nm east of cold front [1] and within 120nm east of trough. Winds turning

clockwise within 240nm of low. 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 swell southeast of line 17S113E 17S099E 37S087E.



Rain areas, scattered showers and isolated thunderstorms mostly within 240nm of

fronts, within 120nm of trough, and 300nm 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.