Weather forecast for Perth effective as of 4:00 PM Tuesday August 28

Weather forecast for Perth effective as of 4:00 PM Tuesday August 28
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 lies over the region today and tomorrow with a embedded weak low within the vicinity of the area in the early hours,strong southwesterly pressure gradient in the late afternoon and evening.

The rest of Tuesday August 28:

City:

Showers.Possible thunderstorm.

Chance of any rain:95%

Perth metropolitan area:

Partly to mostly cloudy.A very high(95%) chance of showers.The chance of a thunderstorm and/or small hail .Winds westerly at 25-40 km/h becoming northwesterly at 15-25 km/h at night.

Wednesday August 29:

City:

7-16 Degrees Celsius

Showers.Possible thunderstorm.Becoming windy.

Chance of any rain:100%

Amount:5 to 15 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(100%) chance of showers.The chance of thunderstorms and/or small hail.Winds north-northeasterly at 15-25 km/h becoming southwesterly at 20-30 km/h by late morning increasing to 35-50 km/h by late afternoon becoming southerly at 10-20 km/h later at night.Gusts in excess of 70 km/h,80 km/h near the coast possible in the late afternoon/evening.

Thursday August 30:

City:

9-17 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 0.4 mm.

Perth metropolitan area:

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

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.Light winds.

Saturday September 1:

City:

7-18 Degrees Celsius

Partly to mostly cloudy.

Chance of any rain:5%

Amount:0 mm.

Perth metropolitan area:

Partly to mostly cloudy.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

Mostly sunny.

Chance of any rain:5%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny.Light winds tending west-southwesterly at 10-20 km/h in the afternoon.

Tuesday September 4:

City:

8-19 Degrees Celsius

Showers.

Chance of any rain:70%

Amount:2 to 6 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(70%) chance of showers.Winds west-northwesterly 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.