FQAU23 AMMC 170900

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 1100 UTC 17 July 2026



Part 1 Warnings

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

system.



Melbourne Gale Warning 8.



Part 2 Situation at 170600 UTC

Trough [1] 31S109E 43S111E. Forecast 35S117E to developing low 997hPa near

46S112E at 171800UTC, then near 46S117E to low 997hPa near 46S112E at 181200UTC.



Cold front west of area near 40S062E 50S071E. Forecast near 39S077E 46S090E

50S093E at 181200UTC.



Forecast warm front developing near 38S121E 38S125E at 171800UTC, then near

46S129E 46S117E at 181200UTC.



Forecast trough [2] entering from west near 48S079E 50S083E at 180900UTC, then

near 46S083E 50S087E at 181200UTC.



Part 3 Forecast

Refer to latest warnings for details of the area affected.



South of line 38S080E 29S110E 37S129E, outside warning areas:

Westerly quarter winds within 240nm west of cold front, turning clockwise

within 600nm of low, shifting northwesterly quarter within 480nm east of cold

front and shifting northerly quarter within 240nm east of trough [1] and within

180nm north of warm front. Southwesterly quarter winds within 690nm west of

trough [1] and west of trough [2]. 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 swell south of line 22S080E 24S114E.



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

fronts, troughs and within 90nm of line 14S090E 20S100E. 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 21:00 UTC Friday.