Weather forecast for Perth effective as of 1:00 AM Thursday April 19

Weather forecast for Perth effective as of 1:00 AM Thursday April 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 2.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 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).

Possible showers today and also on Friday  in a somewhat westerly air stream.

A pre frontal trough or a cold front brings likely showers on Saturday then a stronger cold front moves over the region early on Sunday bringing plenty of showers.Can't rule out thunderstorms with some instability.

Post cold frontal showers affect the region thereafter with improving conditions from Tuesday as a ridge of high pressure builds to the south.

Thursday April 19:

City:

12-21 Degrees Celsius

Possible showers.

Chance of any rain:40%

Amount:0 to 0.4 mm.

Perth metropolitan area:

Mostly cloudy.A medium(40%) chance of showers.Light winds becoming west-southwesterly at 15-25 km/h from late morning easing to 5-15 km/h at night,

Friday April 20:

City:

12-24 Degrees Celsius

Shower or two.

Chance of any rain:50%

Amount:0 to 0.4 mm.

Perth metropolitan area:

Partly cloudy.A medium(50%) chance of showers.Light winds becoming west-northwesterly at 10-20 km/h from morning becoming light at night.

Saturday April 21:

City:

12-26 Degrees Celsius

Showers.Possible PM thunderstorm.

Chance of any rain:90%

Amount:2 to 10 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(90%) chance of showers most likely from afternoon.The chance of thunderstorms from afternoon.Winds northwesterly at 20-30 km/h.

Sunday April 22:

City:

16-22 Degrees Celsius

Showers.Possible AM thunderstorm.

Chance of any rain:95%

Amount:5 to 15 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(95%) chance of showers.The chance of thunderstorms in the early hours and morning.Winds west-northwesterly at 20-30 km/h becoming westerly later.

Monday April 23:

City:

15-23 Degrees Celsius

Possible showers.

Chance of any rain:40%

Amount:0 to 1 mm.

Perth metropolitan area:

Partly cloudy.A medium(40%) chance of showers.Winds south-southwesterly at 10-20 km/h.

Tuesday April 24:

City:

10-23 Degrees Celsius

Partly cloudy.

Chance of any rain:5%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Winds east-southeasterly at 10-20 km/h tending southerly in the afternoon and evening.

Wednesday April 25:

City:

11-25 Degrees Celsius

Mostly sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny.Winds easterly at 15-25 km/h becoming light from afternoon.

Forecast for today produced at 12:00 AM,forecast for the rest of the days produced at 3:00 PM Tuesday April 17.Weather icons courtesy of the US National Weather Service.