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 27 September 2026
Part 1 Warnings
Refer to latest warnings for boundary of affected area and type of weather
system.
Melbourne Gale Warning 4.
Melbourne Gale Warning 7.
Melbourne Gale Warning 8.
Part 2 Situation at 271800 UTC
Trough [1] near 12S088E 15S095E. Forecast near 12S087E 14S092E at 290000UTC.
Trough [2] near 17S111E 22S115E. Forecast near 17S113E 22S117E at 281200UTC and
decaying thereafter.
Cold front [1] 31S112E to low 1009hPa near 37S117E to warm front 38S126E.
Forecast cold front [1] decaying to trough [3] 35S118E to low 1001hPa near
42S120E to warm front 42S120E 45S125E 45S132E at 281200UTC, and trough [3]
38S125E to low 992hPa near 49S127E to warm front 51S143E at 290000UTC.
Cold front [2] near 36S089E 50S105E. Forecast near 31S102E 50S122E at 290000UTC.
Part 3 Forecast
Refer to latest warnings for details of the area affected.
South of line 42S080E 35S092E 36S100E 50S119E, outside warning areas:
Westerly quarter winds west of cold front [2], shifting southwesterly quarter
within 240nm west of trough [3], shifting northwesterly quarter within 300nm
east of cold front [2] and within 300nm east of trough [3]. Northeasterly
quarter winds within 240nm of warm front, turning clockwise within 240nm of low
in the western semicircle until 281200UTC. 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 up to heavy swell south of line 37S080E 37S096E.
Rain areas, scattered showers and isolated thunderstorms mostly within 180nm of
fronts, within 180nm of low and within 120nm 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 09:00 UTC Monday.
