Weather forecast for Perth effective as of 8:00 PM Sunday April 22

Weather forecast for Perth effective as of 8:00 PM Sunday April 22:

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

Figure 3.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).

Plenty of thunderstorms occurred last night and this morning in an unstable atmosphere ahead of an upper/middle level trough/disturbance.A cold front also moved through.

Post cold frontal showers affect the region overnight and into tomorrow until afternoon in the moist west-southwesterly air stream.

Early on Tuesday land breeze convergence results in a line of convective clouds offshore,the anvil from those clouds could spread inland therefore slight chance of light showers and/or drizzle over coastal areas in the early hours and morning.

Sunny by Wednesday with a high pressure ridge to the south,a west coast trough deepens near the west coast leading to some warm air advection,west coast trough moves inland from Thursday afternoon.

Some high clouds on Friday ahead of an upper/middle level trough/disturbance.

Warm air advection with a west coast trough deepening near the west coast again next weekend.

The rest of Sunday April 22:

City:

Showers.

Chance of any rain:70%

Perth metropolitan area:

Partly cloudy.A high(70%) chance of showers.Winds westerly at 20-30 km/h.

Monday April 23:

City:

16-22 Degrees Celsius

Showers clearing later.

Chance of any rain:70%

Amount:0.4 to 2 mm.

Perth metropolitan area:

Partly cloudy.A high(70%) chance of showers easing to a slight(20%) chance from afternoon.Winds west-southwesterly at 15-25 km/h becoming southwesterly from afternoon becoming light at night.

Tuesday April 24:

City:

11-22 Degrees Celsius

Partly cloudy.

Chance of any rain:10%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.A slight(20%) chance of light showers and drizzle in the early hours and morning over coastal areas.Light winds becoming south-southwesterly at 10-20 km/h from afternoon becoming south-southeasterly at 10-20 km/h at night.

Wednesday April 25:

City:

11-24 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds east-southeasterly at 10-20 km/h tending south-southwesterly at 10-25 km/h in the afternoon and evening.

Thursday April 26:

City:

13-28 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds easterly and light becoming south-southwesterly at 10-20 km/h from afternoon becoming southerly at night.

Friday April 27:

City:

15-25 Degrees Celsius

Partly cloudy.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Winds southerly at 10-20 km/h tending south-southwesterly at 15-25 km/h in the afternoon and evening.

Saturday April 28:

City:

15-26 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

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

Sunday April 29:

City:

15-29 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

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

Forecast  produced at 8:00 PM Sunday April 22.Weather icons courtesy of the US National Weather Service.