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 9 July 2026
Part 1 Warnings
Refer to latest warnings for boundary of affected area and type of weather
system.
Melbourne Storm Force Wind Warning 10.
Melbourne Gale Warning 7.
Part 2 Situation at 090600 UTC
Cold front [1] 40S121E to low [1] 1001hPa near 47S125E. Forecast near 37S120E
43S128E to low [1] 999hPa near 48S129E at 091500UTC, then low moving east of
area and just cold front [1] near 33S125E 39S129E at 100600UTC, and then moving
east of area.
Cold front [2] near 43S094E 50S101E. Forecast near 35S122E 45S127E 50S126E at
101200UTC.
Trough [1] 25S093E to low [2] 1015hPa near 33S102E to 36S110E. Forecast 22S100E
to low 1018hPa near 27S103E to 31S108E at 101200UTC.
Warm front forecast to enter area from the west near 46S084E 50S080E by
091200UTC, then near 46S111E 50S110E at 101200UTC.
Part 3 Forecast
Refer to latest warnings for details of the area affected.
South of line 41S080E 40S102E 33S129E, outside warning areas:
Westerly quarter winds, shifting northwesterly quarter within 180nm east of
cold fronts [1] and [2], becoming southwesterly quarter within 720nm west of
cold front [2], and turning clockwise within 120nm of low [1]. Wind speeds
20/33 knots. Rough to very rough seas. Moderate to heavy swell.
West of line 24S100E 35S111E:
Southeasterly quarter winds 20/33 knots within 420nm southwest of trough.
Moderate to rough seas. Low to moderate swell.
Remainder:
Winds not exceeding 25 knots. Slight to moderate seas. Low to moderate swell,
increasing to moderate to heavy south of line 38S080E 38S089E.
Rain areas, scattered showers and isolated thunderstorms mostly within 180nm of
fronts, trough, lows, and north of line 19S090E 19S095E. Heavy at times within
90nm of low [2]. 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 Thursday.
