Western Area High Seas Forecast

IDY10220
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High Seas Forecast for Western Metarea 10
WESTERN AREA: 12/30S 90/125E, 30/50S 80/129E
Issued by the Australian Government Bureau of Meteorology, BNOC
For 24 hours commencing 2300 UTC 26 April 2015

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
Melbourne Storm Warning 3 issued 261840UTC:
Area bounded by 40S080E 39S089E 40S094E 41S095E 44S093E 45S087E 44S080E 40S080E.

Part 2 Situation at 1800 UTC
Refer to latest warnings.

Ridge [1] 23S090E 35S106E to high 1023hPa 40S122E to 40S129E. Forecast 24S090E
34S107E to high 1033 hPa near 40S124E to 40S129E at 270600UTC and 24S090E
32S107E 38S120E to high 1033hPa 41S129E at 271800UTC.

Ridge [2] from high 1033 hPa near 40S122E to 45S129E. Forecast from high 1033
hPa near 40S124E to 42S129E at 270600UTC and out of area by 271800UTC.

Trough [1] 30S088E to low [1] 1003 hPa near 39S088E to 50S102E. Forecast
30S090E 33S095E to low [1] 999 hPa near 43S094E to 50S106E at 270600UTC and
30S096E 35S100E to low [1] 991hPa 47S101E 50S106E at 271800UTC.

Trough [2] 12S113E to low [2] 1009 hPa near 15S108E. Forecast 14S106E to low
[2] 1009 hPa near 12S114E at 270600UTC and 16S104E 13S108E to low [2] 1008hPa
12S110E at 271800UTC.

Cold front entering area to be near 38S080E 41S085E to low [3] 993hPa 44S086E
50S093E by 270600UTC and 33S089E 37S092E 40S094E to low [3] 986hPa 43S092E to
50S100E at 271800UTC.

Shallow low 1007hPa near 17S 107E to remain slow moving.

Part 3 Forecast
Refer to latest warnings.

Within 120nm of ridges and 240nm of high:
Variable winds below 20 knots. Slight to moderate seas. Low to moderate swell.

North of ridge [1]:
E quarter winds, tending clockwise within 240nm of low [2] and becoming NE
quarter south of 20S east of 105E by 270600UTC. Winds becoming within 240nm of
shallow low. Wind speeds 10/20 knots, increasing to 15/25 knots north of 24S
east of 108E. Moderate to rough seas. Low to moderate swell.

Remainder south of ridge [1] and east of ridge [2]:
SW quarter winds 15/25 knots. Moderate to rough seas. Moderate swell.

Remainder south of ridge [1], outside warning area:
NW quarter winds, turning SW quarter west of trough [2] and S quarter west of
cold front. Winds tending clockwise within 300nm of lows. Winds speeds 20/30
knots grading to 25/33 knots within 120nm of warning area. Moderate to rough
seas. Moderate to heavy swell.

Scattered showers and isolated thunderstorms within 300nm of troughs and lows.
Scattered to isolated showers remainder away from ridges. Visibility reducing
below 2nm in precipitation.

WEATHER MELBOURNE

The next routine forecast will be issued at 09:00 UTC Monday.