IDW12300
Australian Government Bureau of Meteorology
Western Australia

Perth Forecast
Issued at 4:35 pm WST on Thursday 11 March 2010

Warning summary
Nil.


Forecast for Thursday  evening
Some high cloud about. Light winds tending moderate E'ly later in the evening.

Precis:      Partly cloudy.                     

Forecast for Friday   
A partly cloudy day. Moderate to fresh N/NE winds, easing during the morning
before tending W/NW during the afternoon.

Precis:      Partly cloudy.                     
City:        Min 24     Max 39 
Mandurah:    Min 25     Max 35 

UV Alert:    9:10 am to 3:50 pm, UV Index predicted to reach 9 [Very High]  
Fire Danger: Coastal Plain: VERY HIGH   
             Hills:         VERY HIGH   

Saturday     Cloudy periods.                        Min 21     Max 30
Sunday       Possible early shower.                 Min 18     Max 29
Monday       Cloudy periods.                        Min 17     Max 28
Tuesday      Partly cloudy.                         Min 16     Max 25
Wednesday    Sunny.                                 Min 14     Max 27
Thursday     Sunny.                                 Min 17     Max 29

The next routine forecast will be issued at 4:50 am WST Friday.

IDW11400
Australian Government Bureau of Meteorology
Western Australia

Local Waters Forecast
Yanchep to Mandurah and Offshore to Rottnest Island
Issued at 4:30 pm WST on Thursday 11 March 2010
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 strong high pressure system situated in the Bight with a deepening surface
trough off the west coast.

Forecasts:
Thursday until midnight: S/SW winds 10/15 knots shifting S/SE 8/13 knots in the
evening. Seas to 1.0m. Swell to 1.0m.
Swell at Cottesloe:  to 0.4m.
Winds on Melville Water: Similar.

Friday: E/SE winds 13/18 knots tending NE'ly 13/18 knots early morning. Winds
shifting NW'ly 8/13 knots for a period in the afternoon before shifting W/SW
10/15 knots late afternoon. Seas to 1.0m. Swell to 1.5m.
Swell at Cottesloe:  to 0.4m.
Winds on Melville Water: Similar, 5 knots lighter during the afternoon.

Saturday: Variable winds to 10 knots tending W/SW 15/20 knots during the
afternoon and easing to S/SW 8/13 knots during the evening. Seas to 1.5m. Swell
1.0m to 1.5m.
Sunday: S/SE winds 10/15 knots tending W/SW 10/15 knots during the afternoon.

Current Swell Observations:
Rottnest Waverider Buoy:  0.8m.
Cottesloe Waverider Buoy: 0.3m.

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

The next routine forecast will be issued at 11:30 pm WST Thursday.

IDW10300
Australian Government Bureau of Meteorology
Western Australia

NOTES ON THE WEATHER FOR WESTERN AUSTRALIA
Issued at 4:00pm WST on Thursday the 11th of March 2010

RECENT EVENTS:
NORTHERN HALF:
Isolated morning showers and thunderstorms over the coastal west Kimberley.
Isolated afternoon showers near the west Kimberley coast, Pilbara and northern
Gascoyne.

SOUTHERN HALF:
Some high cloud about.


SYNOPTIC SITUATION AND FORECAST EXPLANATION:
A high pressure system lies in the Bight, directing an northeast flow over the
southern half of the state. Areas of high cloud about this evening over the
southern half. In the north, isolated thunderstorms and
showers over the far west Kimberley, Pilbara, and northern Gascoyne. 
The west coast trough will deepen further on Friday and should trigger isolated
showers and thunderstorms over the western Pilbara west Gascoyne and northern
Central West district during the afternoon and evening. Isolated afternoon
showers and thunderstorms possible in the far north coastal Kimberley. 

FUTURE DEVELOPMENTS:
The surface trough moves inland on Saturday ahead of an approaching cold front.
Isolated showers should develop about the southwest corner during the morning
and tend scattered towards evening, with isolated showers extending to remaining
parts southwest of a line from Perth to Bremer Bay by midnight. The trough may
trigger very isolated showers and thunderstorms over central and eastern parts
of the SW Land Division and adjacent Goldfields on Saturday afternoon and
evening. Afternoon
thunderstorm activity over most of the Kimberley, far northeast Interior, far
west Pilbara and far northwest Gascoyne.
On Sunday isolated showers southwest of a line Lancelin to Lake Grace to
Esperance will contract to the western south coast west of Bremer Bay during the
morning as the cold front continues to slip away to the southeast and a high
pressure ridge develops south of the state. Very isolated afternoon and evening
showers and thunderstorms over eastern parts of the SW Land Division and
southwest Goldfields near the surface trough. Thunderstorm activity should
increase over the Kimberley and extend into the northeastern half of the
Interior. 
On Monday, isolated morning showers about the western south coast in the moist
onshore flow. Isolated afternoon and evening showers and thunderstorms over
eastern parts of the SW Land Division and southwest Goldfields. Thunderstorm
activity continuing over the Kimberley, Interior and developing near the coastal
Pilbara during the afternoon. 

IDW17250
Australian Government Bureau of Meteorology
Western Australia

INTERSTATE CITIES PRECIS FORECAST
Issued at 2:08pm WST on Thursday the 11th of March 2010
for tonight and Friday   

                Min  Max  Weather
Adelaide        15    27    Fine. Sunny.
Hobart          10    20    Fine.
Melbourne       12    24    Sunny.
Canberra        10    21    Fine. Partly cloudy.
Sydney          18    23    Shower or two.
Brisbane        21    27    Few gusty showers
Cairns          25    31    A few showers
Darwin          25    34    Late shower.
Alice Springs   14    28    Fine, cloud increasing.
Perth           24    39    Partly cloudy.