Weather forecast for Perth effective as of 4:00 AM Friday August 17

Weather forecast for Perth effective as of 4:00 AM Friday August 17
Explanatory notes:
Scroll down below this section for forecast. 

Figure 1.Surface synoptic chart at 12 UTC(8 PM local time yesterday).Image courtesy of the Australian Bureau of Meteorology(BOM)

Figure 3.Key features identified on True Colour RGB satellite image at around 06:00 UTC(2 PM local time yesterday).Satellite image courtesy of the Japanese Meteorological Agency(JMA).

Figure 4.Mean Sea Level Pressure(MSLP) analysis with infrared greyscale satellite image at 12 UTC(8 PM 
local time yesterday).Image courtesy of the Australian Bureau of Meteorology(BOM).

Figure 4:Surface synoptic prognosis.Image courtesy of the Australian Bureau of Meteorology(BOM).

Some uncertainty on the precise synoptic conditions from late next weekend with large variation between models and model ensembles.

Friday August 17:

City:

10-18 Degrees Celsius

Clouds decreasing.

Chance of any rain:5%

Amount(rest of today):0mm.

Perth metropolitan area:

Partly cloudy becoming mostly sunny by late morning.Winds southwesterly at 5-15 km/h becoming southeasterly before dawn,becoming south-southwesterly from afternoon,east-southeasterly at night.

Saturday August 18:

City:

5-19 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0  mm.

Perth metropolitan area:

Sunny.Winds east-northeasterly at 10-20 km/h becoming light from afternoon.

Sunday August 19:

City:

9-24 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0  mm.

Perth metropolitan area:

Sunny.Winds northeasterly at 15-25 km/h becoming light by afternoon.

Monday August 20:

City:

10-21 Degrees Celsius

Possible showers.

Chance of any rain:50%

Amount:0 to 7 mm.

Perth metropolitan area:

Partly to mostly cloudy.A medium(50%) chance of showers.Light winds becoming south-southwesterly at 10-25 km/h from afternoon.

Tuesday August 21:

City:

10-18 Degrees Celsius

Showers.

Chance of any rain:60%

Amount:0 to 5 mm.

Perth metropolitan area:

Partly to mostly cloudy.A medium(60%) chance of showers.Winds southerly at 15-30 km/h.

Wednesday August 22:

City:

6-18 Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.A slight(20%) chance of a shower.Winds south-southeasterly at 10-20 km/h.

Thursday August 23:

City:

6-18 Degrees Celsius

Partly cloudy.

Chance of any rain:5%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Winds east-southeasterly at 5-15 km/h becoming light from around the middle of the day.

Forecast for today produced at 12:00 AM,forecast for the rest of the days produced at 4:20 PM Wednesday July 11.Weather icons courtesy of the US National Weather Service.