Western Area High Seas Forecast


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 30 August 2016

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 Gale Warning 2 issued 301805UTC:
Area bounded by 50S080E 33S080E 38S097E 50S117E 50S080E.

Part 2 Situation at 1800 UTC
Refer to latest warnings.

Ridge [1] 29S090E to high 1026 hPa near 32S096E to 23S109E 23S115E. Forecast
28S090E to high 1026 hPa near 32S099E to 22S111E 22S117E at 310600UTC and
27S090E to high 1028 hPa near 32S102E to 27S117E at 311800UTC.

Ridge [2] from high 1026 hPa near 32S096E to 43S109E 50S114E. Forecast from
high 1026 hPa near 32S099E to 44S116E 50S123E at 310600UTC and from high 1028
hPa near 32S102E to 37S113E 44S122E 46S129E at 311800UTC.

Trough [1] 26S109E 37S116E 45S120E 50S126E. Forecast 33S118E 43S121E 46S129E at
310600UTC and 32S126E 37S123E 43S123E at 311800UTC.

Trough [2] 48S077E 50S082E. Forecast 43S080E 50S093E at 310600UTC and 36S080E
43S092E 50S100E at 311800UTC.

Cold front 33S080E 42S091E 50S099E. Forecast 30S080E 38S094E 45S103E 50S107E at
310600UTC and 30S085E 41S104E 50S117E at 311800UTC.

Part 3 Forecast
Refer to latest warnings.

Within 120nm of ridges and 180nm of high:
Variable winds below 20 knots. Slight to moderate seas. Moderate swell.

Remainder north of ridge [1]:
Variable below 20 knots northeast of a line 12S102E 16S106E 21S116E, northeast
of 12S102E 20S121E after 311200UTC. SE quarter winds 10/20 knots remainder
reaching 25 knots at times. Slight to moderate seas. Moderate swell decreasing
to low east of 115E.

Remainder south of ridge [1] and northeast of ridge [2]:
N quarter winds 15/25 knots within 240nm east of trough [1] north from 40S
until 310600UTC. Variable winds below 20 knots remainder east of trough [1]. S
quarter winds 15/25 knots west of trough [1] increasing to 20/30 knots within
180nm west of trough [1] between 30S and 38S until 311200UTC. Slight to
moderate seas east of trough [1]. Moderate to rough seas west of trough [1].
Moderate swell.

Remainder south of ridge [1] and southwest of ridge [2] outside warning area:
NW quarter winds east of cold front tending W quarter between cold front and
trough [2] and SW quarter west of trough [2]. Wind speeds 15/25 knots within
180nm of ridges increasing to 20/33 knots elsewhere outside warning area but
easing to 15/25 knots again north of 35S after 311200UTC. Moderate to rough
seas. Moderate swell increasing to heavy southwest of cold front.

Areas of rain, scattered showers and isolated thunderstorms within 180nm of
cold fronts and troughs. Visibility reducing to below 2nm in precipitation.


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