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Weather forecast for Perth effective as of 7:30 PM Friday March 23:

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 07:00 UTC(3 PM local time yesterday).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).

Tropical Cyclone Marcus rapidly weakens during the weekend as it will be entering a region of high vertical wind shear and also lower sea surface temperatures.Track the tropical cyclone at       .

Plenty of middle and high level clouds during the weekend associated with moisture aloft from Tropical Cyclone Marcus.Rain,showers and drizzle likely at times.

Also a somewhat east-southeast pressure gradient during the weekend.

The remnants of Tropical Cyclone Marcus likely to move over the region on Monday,the low pressure center passing just south of the Perth Area.There is no need to be alarmed as the cyclone would be quite weak then as it rapidly weakens during the weekend upon encountering cool sea surface temperatures and vertical wind shear associated with the subtropical jet stream.

A low pressure trough to the north of the remnant low will bring showers to the Perth ARea

Cooler air mass then lies over the region with sunny conditions by Tuesday afternoon with a ridge of high pressure building to the south.

The rest of Friday March 23:

City:

Mostly cloudy.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Mostly cloudy.Light winds becoming east-southeasterly at 10-20 km/h later.

Saturday March 24:

City:

19-27 Degrees Celsius

Showers.

Chance of any rain:50%

Amount:0 to 0.8 mm.

Perth metropolitan area:

Mostly cloudy,high clouds.A medium(50%) chance of rain and showers.Winds east-southeasterly at 15-25 km/h.

Sunday March 25:

City:

19-28 Degrees Celsius

Possible showers.

Chance of any rain:30%

Amount:0 to 0.6 mm.

Perth metropolitan area:

Mostly cloudy.A slight(30%) chance of rain and showers.Winds easterly at 20-30 km/h tending 15-25 km/h in the afternoon and evening.

Monday March 26:

City:

22-27 Degrees Celsius

Showers.

Chance of any rain:80%

Amount:2 to 6 mm.

Perth metropolitan area:

Cloudy.A very high(90%) chance of showers in the southwest grading to a high(70%) chance in the northeast.Winds northeasterly at 10-25 km/h becoming north-northwesterly before dawn becoming westerly at 25-40 km/h then southwesterly becoming south-southwesterly at 20-30 km/h at night.

Tuesday March 27:

City:

16-23 Degrees Celsius

Possible early shower.

Chance of any rain:30%

Amount:0 to 1 mm.

Perth metropolitan area:

Cloudy with a slight(30%) chance of showers in the early hours and morning then sunny.Winds south-southeasterly at 15-25 km/h tending south-southwesterly at 20-30 km/h in the afternoon and evening.

Wednesday March 28:

City:

13-25 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds east-southeasterly at 10-20 km/h becoming south-southwesterly at 20-30 km/h from afternoon becoming south-southeasterly at 10-20 km/h at night.

Thursday March 29:

City:

13-27 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds southeasterly at 10-20 km/h tending south-southwesterly at 20-30 km/h in the afternoon and evening.

Friday March 30:

City:

16-30 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds east-southeasterly at 20-30 km/h tending 10-20 km/h in the afternoon and evening.

Forecast produced at 7:30 PM Friday March 23.Weather icons courtesy of the US National Weather Service.