Weather forecast for Perth effective as of 5:00 PM Wednesday August 29

Weather forecast for Perth effective as of 5:00 PM Wednesday August 29
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).

Deep,cold and unstable air mass lied over the region today with a weak low within the vicinity of the area in the early hours,strong southwesterly pressure gradient in the late afternoon and evening.Showers and strong wing contracting to coastal areas in the next few hours with a more southerly steering flow.

Tomorrow,slight chance of showers near the coast early,mostly sunny with shallow convective clouds increasing during the afternoon,cold air mass lies over the region with a south-southwesterly pressure gradient.

"Anticyclone gloom" affects the region on Friday with moist low level air trapped under a subsidence inversion.

The next cold front likely moves across the region next Tuesday with a cold air mass over the region thereafter.

The rest of Wednesday August 29:

City:

Windy with showers,easing.

Chance of any rain:90%

Perth metropolitan area:

Partly cloudy becoming mostly clear later at night.A very high(90%) chance of showers easing to contracting to northwestern coastal suburbs by midnight.Winds southwesterly at 35-50 km/h becoming southerly at 5-15 km/h at night.Wind gusts in excess of 80 km/h possible in the early evening.

Thursday August 30:

City:

7-17 Degrees Celsius

Clouds increasing.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny morning,becoming partly to mostly cloudy by afternoon.A slight(30%) chance of showers over coastal suburbs in the early hours,grading to a near zero chance over inland suburbs.Winds southerly at 5-15 km/h becoming south-southwesterly at 20-30 km/h from morning becoming light at night.

Friday August 31:

City:

7-17 Degrees Celsius

Cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Cloudy.A slight(20%) chance of a shower and/or drizzle.Light winds.

Saturday September 1:

City:

7-18 Degrees Celsius

Partly to mostly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Partly to mostly cloudy.A slight(20%) chance of a shower most likely over inland areas in the afternoon.Light winds.

Sunday September 2:

City:

7-21 Degrees Celsius

Mostly sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny.Light winds.

Monday September 3:

City:

7-20 Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.A slight(20%) chance of a shower.Light winds tending westerly at 15-30 km/h from late morning until evening.

Tuesday September 4:

City:

9-18 Degrees Celsius

Showers.

Chance of any rain:80%

Amount:2 to 8 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(80%) chance of showers.Winds west-southwesterly at 20-30 km/h.

Wednesday September 5:

City:

8-16 Degrees Celsius

Showers.

Chance of any rain:80%

Amount:1 to 4 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(80%) chance of showers.Winds south-southwesterly at 20-30 km/h.

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.