Weather forecast for Perth effective as of 4:00 AM Sunday July 29

Weather forecast for Perth effective as of 4:00 AM Sunday July 29
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 3.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 4.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).

Partly to mostly conditions occurred for the Perth and Fremantle by-elections.

A cold front brushes the region late on Sunday/early on Monday with a strong cold front likely affecting the region on Wednesday with a deep cold air mass over the region thereafter.

Sunday July 29:

City:

11-19 Degrees Celsius

Showers mainly at night.

Chance of any rain:90%

Amount:1 to 2 mm.

Perth metropolitan area:

Partly to mostly cloudy.A slight(30%) chance of showers and drizzle,increasing to a very high(90%) chance late at night.Light winds becoming west-northwesterly at 15-30 km/h from late morning.

Monday July 30:

City:

10-18 Degrees Celsius

Pre dawn showers.

Chance of any rain:90%

Amount:1 to 2 mm.

Perth metropolitan area:

Partly cloudy.A very high(90%) chance of showers easing to a slight(20%) chance from morning.Winds south-southwesterly at 10-20 km/h becoming light from morning.

Tuesday July 31:

City:

6-19 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 0.4 mm.

Perth metropolitan area:

Partly to mostly cloudy.A slight(30%) chance of showers.Light winds becoming northwesterly at 15-25 km/h from around the middle of the day.

Wednesday August 1:

City:

11-16 Degrees Celsius

Windy with showers and thunderstorms.

Chance of any rain:100%

Amount:15 to 30 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(100%) chance of showers and thunderstorms.Possible small hail.Winds northwesterly at 20-30 km/h becoming westerly at 25-40 km/h becoming southwesterly at 35-55 km/h.Gusty winds likely.

Thursday August 2:

City:

7-16 Degrees Celsius

Showers.

Chance of any rain:90%

Amount:2 to 8 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(90%) chance of showers.The chance of thunderstorms and/or small hail in the early hours.Winds southwesterly at 25-40 km/h.

Friday August 3:

City:

10-18 Degrees Celsius

Showers.

Chance of any rain:90%

Amount:4 to 10 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(90%) chance of showers.Winds southwesterly at 30-45 km/h.

Saturday August 4:

City:

9-17 Degrees Celsius

Showers.

Chance of any rain:70%

Amount:0.4 to 3 mm.

Perth metropolitan area:

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

Forecast for today produced at 12:00 AM,forecast for the rest of the days produced at 4:20 PM Wednesday July 11.Weather icons courtesy of the US National Weather Service.