Western Area High Seas Forecast

IDY10220
SECURITE

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 1100 UTC 21 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 Gale Warning 1 issued at 210750UTC:
Area bounded by 19S115E 18S120E 20S120E 21S115E 19S115E.

Melbourne Gale Warning 4 issued 210640UTC:
Area bounded by 46S099E 44S111E 46S129E 50S139E 50S096E 46S099E.

Part 2 Situation at 0600 UTC
Refer to latest warnings.

Ridge [1] 40S080E to high 1028 hPa near 39S094E to 38S111E 34S118E 34S129E.
Forecast 40S079E to high 1029 hPa near 39S094E to 38S104E 39S114E 34S129E at
211800UTC and 38S080E to high 1033 hPa near 45S091E to 39S098E 37S110E 38S120E
35S129E at 220600UTC

Ridge [2] west of area and forecast near 40S083E 50S082E at 211800UTC and
45S091E 50S090E at 220600UTC.

Cold front [1] 40S120E 47S129E. Forecast 39S123E 43S129E at 211800UTC and
39S126E 41S129E at 220600UTC.

Cold front [2] 45S100E 50S106E. Forecast 42S111E 50S119E at 211800UTC and
41S115E 50S121E at 220600UTC.

Trough 12S110E 20S118E. Forecast 12S110E 20S118E at 211800UTC and 12S108E
16S115E 20S117E at 220600UTC.

Part 3 Forecast
Refer to latest warnings.

Within 180nm of ridges and within 240nm of high:
Variable winds below 20 knots, tending N quarter 10/20 knots reaching 25 knots
at times east of 120E. Winds tending W quarter 10/20 knots near ridge [2].
Slight to moderate seas. Low to moderate swell tending moderate to heavy near
ridge [2].

Northeast of trough:
Variable winds below 20 knots becoming clockwise within 180nm of low. Winds
becoming NE quarter 15/25 knots east of 115E. Slight to moderate seas. Low to
moderate swell.

Remainder north of ridge, outside warning area:
SE quarter winds 10/20 knots tending NE quarter 15/25 knots east of trough and
becoming clockwise 20/30 knots within 180nm of low. Winds grading 25/33 knots
within 90nm of warning area. Moderate to rough seas. Winds easing 10/20 knots
with slight to moderate seas remainder south of 30S. Low to moderate swell.

Remainder south of ridge [1], outside warning area:
NW quarter winds 20/30 knots east of cold front [1], tending W quarter west of
cold front [1] and SW quarter west of cold front [2] in area east of ridge [2].
Winds grading 25/33 knots within 120nm of warning area. NW quarter winds 15/25
knots remainder west of ridge [2]. Moderate to rough seas, moderate to heavy
swell.

Rain areas, scattered showers and isolated thunderstorms within 120nm of trough
and east of trough, and also within 240nm of cold fronts. Scattered showers and
isolated thunderstorms remainder within 600nm west of cold fronts and also
remainder north of 15S west of 105E. Isolated showers remainder away from
ridge. Visibility reducing below 2nm in precipitation.

WEATHER MELBOURNE

The next routine forecast will be issued at 21:00 UTC Tuesday.