IDW12300
Australian Government Bureau of Meteorology
Western Australia

Perth Forecast
Issued at 4:50 am WDT on Friday 21 November 2008

Warning summary
Nil.

Forecast for Friday   
A possible shower or two but expect lengthy fine periods. Light to moderate west
to northwest winds.

Precis:      A possible shower or two.          
City:        Max 24 
Mandurah:    Max 22 

UV Alert:    9:00 am to 5:10 pm, UV Index predicted to reach 11 [Extreme]  
Fire Danger: Coastal Plain: LOW      
             Hills:         LOW      

Saturday     Few showers, thunderstorm risk.        Min 15     Max 23
Sunday       Shower or two.                         Min 13     Max 21
Monday       Shower or two.                         Min 11     Max 21
Tuesday      Shower or two.                         Min 10     Max 21
Wednesday    Shower or two.                         Min 10     Max 21
Thursday     Shower or two.                         Min 13     Max 25

The next routine forecast will be issued at 11:20 am WDT Friday.

IDW11400
Australian Government Bureau of Meteorology
Western Australia

Local Waters Forecast
Yanchep to Mandurah and Offshore to Rottnest Island
Issued at 4:30 am WDT on Friday 21 November 2008
Valid until midnight Sunday

Please Be Aware
Wind gusts can be 40 percent stronger than the averages given here, and maximum
wave may be up to twice the height.

Warnings
Nil.

Synoptic Situation
A trough extending from inland crosses the west coast south of Perth, linking
with a low pressure centre well offshore.

Forecasts:
Friday until midnight: NW winds 8/13 knots, increasing to NW 13/18 knots by the
afternoon. Seas 1.0m to 1.5m. Swell  to 2.0m.
Swell at Cottesloe:  to 0.3m.
Winds on Melville Water: Similar.

Saturday: N/NW winds 15/20 knots increasing to 20/25 knots during the morning.
Winds easing to NE/NW 10/15 knots in the evening. Seas to 1.5m to 2.0m. Swell to
2.0m.
Sunday: NE/NW winds 10/15 knots tending S'ly 10/15 knots in the morning,
increasing to 20/25 knots in the afternoon.

Current Swell Observations:
Rottnest Waverider Buoy:  1.3m.
Cottesloe Waverider Buoy: 0.4m.

Current swell height information is supplied by the Department for Planning and
Infrastructure and is current only at the time of issue of this forecast

The next routine forecast will be issued at 11:30 am WDT Friday.

IDW10300
Australian Government Bureau of Meteorology
Western Australia

NOTES ON THE WEATHER FOR WESTERN AUSTRALIA
Issued at 4:55am WDT on Friday the 21st of November 2008

SYNOPTIC SITUATION AND FORECAST EXPLANATION:
A low lies off the lower west coast with a trough extending from the low across
southern districts of the SW Land Division into the Goldfields. Isolated showers
are expected in the onshore flow along the lower west coast. To the south of the
trough, in southern SW Districts, E'ly winds combined with middle level
instability should bring isolated showers tending scattered showers  along the
western south coast. Isolated showers may also reach the far south of the
Goldfields and the Eucla.
Middle level cloud streaming off from weakening Tropical Cyclone Anika well to
the northwest of the state, will cause some rain areas to extend from the west
of the Pilbara and northern Gascoyne through central parts of the state into the
Interior. Some moderate falls are likely.
Isolated mostly afternoon and evening showers and thunderstorms are likely to
continue over the northern Kimberley during the outlook period.


FUTURE DEVELOPMENTS:
The surface low to the west of Perth should deepen and approach the lower west
coast Friday night into Saturday morning, causing showers and isolated
thunderstorms to develop initially over western coastal parts of the SW Land
Division and the Southwest district, before extending to western and southern
inland parts during the day. Expect some moderate falls in southern districts
and also later in the Southeast coastal district from middle level cloud
developing east and south of the low pressure system. It will remain fine over
inland parts of Central West district and the eastern Central Wheat Belt.
Rain areas and middle level cloud over the southern Pilbara, northern Gascoyne
and western Interior will extend southeast over the central and eastern
Goldfields, Southeast Coastal district and western Eucla later on Saturday.

The low will move over the southwest corner of the state during Saturday night,
causing showers and thunderstorms to ease over southern and eastern districts by
early Sunday morning. Isolated showers are likely over the remaining SW Land
Division but should contract to mainly near western and southern coastal parts
by Sunday evening.
Rain areas will clear from the west Pilbara and the Gascoyne, but continue
through the Interior, eastern Goldfields, southern Interior and the Eucla,
although easing and contracting to the eastern Interior and Eucla by evening.
By Monday the SW Land Division lies in a S'ly flow with the low pressure system
lying south of Esperance. Expect isolated showers over southern and western
parts contracting to the south coast by evening. Isolated showers will linger
over the southern Goldfields and the Eucla before contracting to the Eucla coast
by evening. Rain areas in the interior will be confined to far eastern parts and
clear during the day.   

IDW17250
Australian Government Bureau of Meteorology
Western Australia

INTERSTATE CITIES PRECIS FORECAST
Issued at 4:55am WDT on Friday the 21st of November 2008 for today and tonight


                Max  Weather
Adelaide        20    Light shower or two.
Hobart          17    Showers developing.
Melbourne       21    Late rain.
Canberra        22    Fine, mostly sunny.
Sydney          25    Fine. Mostly sunny.
Brisbane        29    Fine.
Cairns          32    A'noon shower/storm
Darwin          35    Isolated shower/storm.
Alice Springs   36    Windy, late shower/storm.
Perth           24    A possible shower or two.