IDY10210
SECURITE
High Seas Forecast for South Eastern Metarea 10
SOUTHEASTERN AREA: 28S/50S, 129E/170E
Issued by the Australian Government Bureau of Meteorology, BNOC
For 24 hours commencing 2300 UTC 20 August 2017
PLEASE BE AWARE
Wind gusts can be a further 40 percent stronger than the averages given here,
and maximum waves may be up to twice the height.
Part 1 Warnings
Refer to latest warnings for details of the area affected.
Melbourne Gale Warning 4.
Part 2 Situation at 1800 UTC
Refer to latest warnings for boundary of affected area and type of weather
system.
High [1] 1021 hPa near 31S152E. Forecast 1023 hPa near 28S163E at 220000UTC.
High [2] 1019 hPa near 36S153E. Forecast 1021 hPa near 40S163E at 220000UTC.
Low 1003 hPa near 36S136E and weakening by 220000UTC.
Cold front forecast 39S129E 48S151E 50S153E at 220000UTC.
Trough forecast 30S154E 33S157E 41S153E at 220000UTC.
Warm front 46S136E 47S129E and moving south of 50S by 220000UTC.
Part 3 Forecast
Refer to latest warnings.
South of line 37S129E 43S145E 50S163E outside warning area:
Northwesterly quarter winds tending westerly quarter west of cold front and
northerly quarter south of warm front. Wind speeds 20/30 knots increasing to
25/33 knots within 120nm of warning area. Rough to very rough seas. Moderate to
heavy swell.
Within 300nm of low:
Clockwise winds winds 20/30 knots in the western semicircle decreasing below 25
knots by 211200UTC. Moderate to rough seas. Moderate swell.
Within 180nm of line 45S166E 37S166E 30S170E:
Southerly quarter winds 15/25 knots decreasing below 25 knots by 211200UTC.
Moderate to rough seas. Moderate to heavy swell.
Remainder:
Wind speeds not exceeding 25 knots. Slight to moderate seas. Low to moderate
swell.
Weather
Rain areas, scattered showers and thunderstorms west of cold front and within
240nm east of cold front and 180nm of trough. Isolated showers remainder.
Visibility reducing below 2nm in precipitation.
WEATHER MELBOURNE
The next routine forecast will be issued at 09:00 UTC Monday.
