Weather forecast for Perth effective as of 12:00 AM Saturday August 11

Weather forecast for Perth effective as of 12:00 AM Saturday August 11
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).

A cold morning today with areas of early frost possible over the hills and in hollow areas with excellent radiational cooling of already cold air.

Finally a sunny day on Sunday with a high pressure system over Southern Australia.

A cold front moves across the region on Tuesday

Saturday August 11:

City:

3-18 Degrees Celsius

Mostly sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny with just a few afternoon clouds.Areas of early frost possible over the hills and in hollow areas.Light winds.

Sunday August 12:

City:

5-21 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds northeasterly at 10-20 km/h becoming north-northeasterly at 15-30 km/h in the morning becoming north-northeasterly at 10-25 km/h.

Monday August 13:

City:

8-22 Degrees Celsius

Sunny day.

Chance of any rain:20%

Amount:0  mm.

Perth metropolitan area:

Sunny day.A slight(20%) chance of showers at night.Winds north-northeasterly at 10-20 km/h becoming north-northwesterly at 20-35 km/h from late morning.

Tuesday August 14:

City:

11-18 Degrees Celsius

Rain then showers.

Chance of any rain:95%

Amount:4 to 12 mm.

Perth metropolitan area:

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

Wednesday August 15:

City:

7-17 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 tending southwesterly at 10-20 km/h during the day.

Thursday August 16:

City:

6-17 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.

Friday August 17:

City:

6-18 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.

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.