Weather forecast for Perth effective as of 12:30 AM Wednesday April 4

Weather forecast for Perth effective as of 12:30 AM Wednesday April 4:

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 4.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 5.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 6:Surface synoptic prognosis.Image courtesy of the Australian Bureau of Meteorology(BOM).

The west coast trough moved inland around the middle of the day on Tuesday bringing a sea breeze with the marine layer advected inland.

The radiational cooling of the moist marine layer overnight brings the formation of areas of fog early on Wednesday,most likely in the north and east where the winds are lighter.Already some mist has developed.

Southerly pressure gradient "bends" with solar heating on Wednesday leading to a significant sea breeze in the afternoon and evening with weaker pressure gradients towards the end of the working week leading to lighter winds by Friday.

Marine layer advects inland again on Friday afternoon and the radiational cooling of the moist marine layer overnight brings the possibility of areas of fog early on Saturday.Some uncertainty on the mesoscale features on Saturday and cannot rule out a shower.

Pressure gradient will be stronger during the weekend leading to slightly stronger sea breezes.

During the next working week,a cold front possibly moves through the region.

Wednesday April 4:

City:

17-28 Degrees Celsius

Mostly sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny.Areas of fog most likely in the north and east clearing by 8 AM.Winds southerly at 10-20 km/h tending southwesterly at 20-30 km/h in the afternoon and evening.

Thursday April 5:

City:

16-28 Degrees Celsius

Sunny day.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny,mostly clear at night.Winds east-southeasterly at 5-15 km/h tending southwesterly at 15-25 km/h in the afternoon and evening becoming south-southwesterly at 5-15 km/h at night.

Friday April 6:

City:

16-29 Degrees Celsius

Sunny day.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny,mostly clear at night.Light winds becoming southwesterly at 10-20 km/h from afternoon becoming light at night.

Saturday April 7:

City:

16-25 Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.A slight(20%) chance of a shower.Areas of fog possible clearing by 8 AM.Light winds becoming southwesterly at 15-25 km/h from around the middle of the day easing to south-southwesterly at 10-20 km/h at night.

Sunday April 8:

City:

15-26 Degrees Celsius

Partly cloudy.

Chance of any rain:10%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Light winds becoming southwesterly at 15-25 km/h from afternoon becoming south-southwesterly at 10-20 km/h at night.

Monday April 9:

City:

15-25 Degrees Celsius

Mostly sunny.

Chance of any rain:10%

Amount:0 mm.

Perth metropolitan area:

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

Tuesday April 10:

City:

15-25 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 1 mm.

Perth metropolitan area:

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

Forecast for today produced at 12:30 AM,forecast for the rest of the days  produced at 4:00 PM Tuesday April 3.Weather icons courtesy of the US National Weather Service.