Weather forecast for Perth effective as of 9:00 PM Saturday April 28

Weather forecast for Perth effective as of 9:00 PM Saturday April 28:

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).

Moist low level air advected over the region from the southeast last night.This resulted in the formation of low level clouds east and over the Darling Scarp,which advected westwards resulting in a spectacular 'waterfall" katabatic effect down the slope of the hills on Saturday morning.


Warm air advection with a west coast trough deepening near the west coast again from Sunday result in a warm Sunday.

The west coast trough moves inland around the middle of the day on Monday resulting in an afternoon sea breeze with lower temps.


Typical late autumn weather from Tuesday as a colder air mass moves over the region with some cold air advection.

The rest of Saturday April 28:

City:

High clouds(mostly clear).

Chance of any rain:0%

Perth metropolitan area:

High clouds(mostly clear).Light winds becoming easterly at 10-20 km/h.

Sunday April 29:

City:

17-31 Degrees Celsius

Sunny day.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

A sunny day,just a little high clouds(mostly clear) possible at night.Winds northeasterly at 20-30 km/h becoming light from afternoon becoming east-northeasterly at 10-20 km/h at night.

Monday April 30:

City:

17-29 Degrees Celsius

Partly cloudy.

Chance of any rain:10%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Winds northeasterly at 20-30 km/h becoming northerly from mid morning becoming west-northwesterly at 20-30 km/h from early afternoon becoming south-southwesterly from late afternoon.

Tuesday May 1:

City:

13-21 Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:0  mm.

Perth metropolitan area:

Partly cloudy.A slight(20%) chance of showers.Winds south-southwesterly at 15-25 km/h.

Wednesday May 2:

City:

11-20 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 0.4 mm.

Perth metropolitan area:

Partly cloudy.A slight(30%) chance of showers.Winds south-southwesterly at 20-35 km/h.

Thursday May 3:

City:

8-21 Degrees Celsius

Mostly sunny.

Chance of any rain:10%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny.Light winds.

Friday May 4:

City:

9-23 Degrees Celsius

Sunny.

Chance of any rain:5%

Amount:0 mm.

Perth metropolitan area:

Sunny.Light winds.

Saturday May 5:

City:

11-24 Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.A slight(20%) chance of a shower.Winds south to southwesterly at 10-20 km/h.

Forecast produced at 6:00 PM Thursday April 26.Weather icons courtesy of the US National Weather Service.