Weather forecast for Perth effective as of 12:00 AM Saturday August 18

Weather forecast for Perth effective as of 12:00 AM Saturday August 18
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).

Warm air advection with a warm air mass over the region by Sunday resulting in the warmest day since May or June likely.

Saturday August 18:

City:

5-20 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds easterly at 10-25 km/h becoming northeasterly at 10-20 km/h by late morning,light from afternoon,easterly at 5-15 km/h at night.

Sunday August 19:

City:

8-24 Degrees Celsius

Sunny.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Sunny.A slight(20%) chance of showers at night.Winds northeasterly at 10-25 km/h becoming light by afternoon.

Monday August 20:

City:

12-22 Degrees Celsius

Showers.

Chance of any rain:60%

Amount:1 to 8 mm.

Perth metropolitan area:

Partly to mostly cloudy.A medium(60%) chance of showers.Winds northeasterly at 15-25 km/h shifting westerly later during the day.

Tuesday August 21:

City:

10-18 Degrees Celsius

Showers.

Chance of any rain:90%

Amount:1 to 5 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(90%) chance of showers.Winds southwesterly at 20-35 km/h.

Wednesday August 22:

City:

7-17 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.A slight(30%) chance of showers.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.Light winds.

Friday August 24:

City:

9-19 Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.A slight(20%) chance of a shower from evening.Winds northeasterly at 10-20 km/h becoming northwesterly later during 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.