Weather forecast for Perth effective as of 10:00 PM Monday July 9

Weather forecast for Perth effective as of 10:00 PM Monday July 9
Explanatory notes:
Scroll down below this section for forecast. 

Figure 1.Surface synoptic chart at 06 UTC(2 PM local time today).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 today).Satellite image courtesy of the Japanese Meteorological Agency(JMA).

Figure 4.Mean Sea Level Pressure(MSLP) analysis with infrared greyscale satellite image at 06 UTC(2 PM 
local time today).Image courtesy of the Australian Bureau of Meteorology(BOM).

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

Large diurnal temperature variation until Thursday with a warm air mass leading to relatively warm afternoons but excellent radiational cooling leading to cold mornings.A west coast trough lies offshore.

Particularly so from Wednesday as the west coast trough lies inland leading to little prospects for katabatic winds during the early hours.Also as the pressure gradient "bends" a little during the day on Wednesday leading to a light sea breeze in the afternoon.The chance of patches of fog early on Wednesday.

A cold front is likely to move across the region on Thursday night/early on Friday and another cold front on Sunday.

Monday July 9:

City:

Clear.

Chance of any rain:0%

Perth metropolitan area:

Clear.Light winds.

Tuesday July 10:

City:

5-21 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds easterly at 5-15 km/h becoming light from late morning.

Wednesday July 11:

City:

4-21 Degrees Celsius

Becoming sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny becoming sunny by mid morning.Patches of fog possible early.Light winds tending south-southwesterly at 10-20 km/h in the afternoon.

Thursday July 12:

City:

4-21 Degrees Celsius

Night showers.

Chance of any rain:70%

Amount:0.4 to 5 mm.

Perth metropolitan area:

Mostly sunny morning.A very high(90%) chance of showers over far southwestern areas from evening,a high(70%) chance elsewhere.Light winds becoming northwesterly at 20-30 km/h from afternoon.

Friday July 13:

City:

11-19 Degrees Celsius

Showers easing.

Chance of any rain:90%

Amount:1 to 3 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(90%) chance of showers easing to a medium(60%) in the morning.Winds west-southwesterly at 20-30 km/h becoming light at night.

Saturday July 14:

City:

8-18 Degrees Celsius

Showers.

Chance of any rain:80%

Amount:0.4 to 2 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(80%) chance of showers.Winds west-northwesterly at 10-20 km/h.

Sunday July 15:

City:

9-18 Degrees Celsius

Showers

Chance of any rain:90%

Amount:1 to 5 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(90%) chance of showers.Winds northwesterly at 10-20 km/h shifting southwesterly later.

Monday July 16:

City:

11-19 Degrees Celsius

Showers

Chance of any rain:80%

Amount:0.4 to 2 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(80%) chance of showers.Winds west-southwesterly at 20-30 km/h.

Forecast for today produced at 11:45 PM Monday May 7,forecast for the rest of the days produced at 5:00 PM Monday May 7.Weather icons courtesy of the US National Weather Service.