IDW12300
Australian Government Bureau of Meteorology
Western Australia

Perth Forecast
Issued at 4:30 pm WDT on Wednesday 7 January 2009

Warning summary
Nil.

Forecast for Wednesday evening
Fine. A moderate to fresh sea breeze.  

Precis:      Fine.                              

Forecast for Thursday 
Fine. A hot day. Fresh and gusty easterly winds easing during the morning before
a moderate to fresh afternoon sea breeze.  

Precis:      Fine, hot.                         
City:        Min 20     Max 37 
Mandurah:    Min 20     Max 36 

UV Alert:    9:20 am to 5:30 pm, UV Index predicted to reach 12 [Extreme]  
Fire Danger: Coastal Plain: HIGH     
             Hills:         HIGH     

Friday       Fine, hot.                             Min 21     Max 37
Saturday     Fine, hot.                             Min 20     Max 36
Sunday       Fine, hot.                             Min 21     Max 37
Monday       Cool change.                           Min 19     Max 28
Tuesday      Fine.                                  Min 16     Max 29
Wednesday    Fine.                                  Min 16     Max 31

The next routine forecast will be issued at 4:50 am WDT Thursday.

IDW11400
Australian Government Bureau of Meteorology
Western Australia

Local Waters Forecast
Yanchep to Mandurah and Offshore to Rottnest Island
Issued at 4:30 pm WDT on Wednesday 7 January 2009
Valid until midnight Saturday

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
Strong Wind Warning for Wednesday evening and Thursday afternoon/evening.

Synoptic Situation
A ridge of high pressure is developing south of the state. Strong sea breezes
are expected over the next few days.

Forecasts:
Wednesday until midnight: S/SW winds 18/23 knots increasing to 20/30 knots by
evening. Inshore winds easing S/SE'ly 18/23 knots during the evening. Seas 1.5m
to 2.0m. Swell 1.5m to 2.0m, easing.
Swell at Cottesloe:  to 0.6m.
Winds on Melville Water: S/SW'ly winds 13/18 knots reaching 18/23 knots by dusk.
Winds then easing S/SE'ly 8/13 knots later in the evening.

Thursday: SE winds 20/25 knots easing to 15/20 knots during the morning, tending
E/SE'ly 10/15 knots inshore by late morning. Winds throughout shifting S/SW'ly
early in the afternoon and increasing to S/SW'ly 20/30 knots in the afternoon
and evening. Seas 1.0m to 1.5m, rising to 2.0m later. Swell 1.0m to 1.5m.
Swell at Cottesloe:  to 0.5m.
Winds on Melville Water: SE winds 13/18 knots easing E/SE'ly 8/13 knots mid
morning, shifting S/SW'ly and increasing to 18/23 knots during the afternoon.

Friday: SE winds 15/25 knots easing to E/SE 10/15 knots during the morning.
Winds tending S/SW'ly and increasing to 20/30 knots during the afternoon and
evening. Seas 1.5m to 2.0m. Swell to 1.5m.
Saturday: S/SE winds 20/25 knots easing to E/SE 15/20 knots during the morning
before becoming S/SW'ly 20/30 knots during the afternoon.

Current Swell Observations:
Rottnest Waverider Buoy:  1.7m.
Cottesloe Waverider Buoy: 0.6m.

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 pm WDT Wednesday.

IDW10300
Australian Government Bureau of Meteorology
Western Australia

NOTES ON THE WEATHER FOR WESTERN AUSTRALIA
Issued at 4:00pm WDT on Wednesday the 7th of January 2009

RECENT EVENTS:
NORTHERN HALF:
Isolated afternoon showers and thunderstorms in the Kimberley. Very hot away
from coastal areas.

SOUTHERN HALF:
Fine. Cloudy areas near south coast. 


SYNOPTIC SITUATION AND FORECAST EXPLANATION:
Other than isolated thunderstorms in the Kimberley, Pilbara and inland Gascoyne
fine weather is expected this evening. 
On Thursday a high pressure ridge will lie south of the state with a heat trough
near or just inland from the west coast. Fine weather is expected throughout the
SW Land Division, with hot to very hot conditions away from the south coast
areas. Also expect fine weather in the Eucla and Goldfields.
Seasonal thunderstorms in the Kimberley should be mainly in the north. There may
also be isolated high based afternoon thunderstorms in the inland Gascoyne
though expect only light rainfall from these storms. 

FUTURE DEVELOPMENTS:
Fairly similar conditions are expected on Friday and Saturday, with the heat
trough off the west coast in the morning then pushing just inland during the
afternoon as sea breezes set in. Hot to very hot weather again appears likely in
SW areas away from the south coast. Further isolated thunderstorms appear likely
in the Kimberley tending scattered in the far north.  
On Sunday the deep heat trough should be again off the west coast in the
morning. Expect hot to very hot weather in all SW districts. The trough will
move inland in the afternoon and to eastern parts of the SW Land Division in the
evening. A weak cold front may cause isolated light showers along the western
south coast later in the evening as cooler conditions develop in west coastal
parts.  
Expect a cool change in western and southern SW districts on Monday. 

IDW17250
Australian Government Bureau of Meteorology
Western Australia

INTERSTATE CITIES PRECIS FORECAST
Issued at 2:41pm WDT on Wednesday the 7th of January 2009
for tonight and Thursday 

                Min  Max  Weather
Adelaide        14    25    Fine. Mostly sunny.
Hobart          8     17    Shower or two.
Melbourne       13    19    Light shower or two clearing.
Canberra        16    28    Fine, cool afternoon change.
Sydney          21    23    Cloudy. Shower or two.
Brisbane        21    31    Mostly fine. Possible storm.
Cairns          25    31    Mostly fine
Darwin          28    33    Showers, inland storm.
Alice Springs   21    36    Fine, mostly sunny.
Perth           20    37    Fine, hot.