Weather forecast for Perth effective as of 7:00 PM Sunday August 19

Weather forecast for Perth effective as of 7:00 PM Sunday August 19
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).

With warm air mass over the region today,it was the warmest day of winter so far.

A west coast trough strengthens overnight with a weak low approaching the southwest of the state tomorrow,ahead of an upper/middle level disturbance.Plenty of middle level clouds tomorrow,the chance of elevated showers and thunderstorms.Possibly warmer than today,depending on cloud cover.Virga likely.

Plenty of low clouds from evening with the marine layer onshore.

Cold air mass leies over the region on Tuesday

The rest of Sunday August 19:

City:

Partly cloudy.

Chance of any rain:0%

Perth metropolitan area:

Partly cloudy.Winds easterly at 10-20 km/h.

Monday August 20:

City:

14-25 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 1 mm.

Perth metropolitan area:

Partly to mostly cloudy.A slight(30%) chance of showers.The chance of a thunderstorm,most likely from late afternoon.Winds east-northeasterly at 15-25 km/h becoming northeasterly at 20-35 km/h in the morning becoming northerly from late morning becoming northwesterly at 10-20 km/h from late afternoon becoming westerly at night.

Tuesday August 21:

City:

12-19 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

Partly to mostly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Partly to mostly cloudy.A slight(20%) chance of showers.Winds south-southwesterly at 15-30 km/h.

Thursday August 23:

City:

6-18 Degrees Celsius

Partly cloudy.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Light winds.

Friday August 24:

City:

7-20 Degrees Celsius

Partly cloudy.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Winds northeasterly at 10-20 km/h becoming light from afternoon.

Saturday August 25:

City:

8-19 Degrees Celsius

Possible PM shower.

Chance of any rain:30%

Amount:0 to 2 mm.

Perth metropolitan area:

Sunny morning.A slight(30%) chance of showers from afternoon.Winds northeasterly at 10-20 km/h shifting northwesterly later during the day.

Sunday August 26:

City:

9-16 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 southerly at 15-30 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.