7 day weather forecast

Effective as of 5:00 PM Tuesday September 25

Explanatory notes:

Cooler air mass moved over the region today,a morning shower or two occured with a weak cold frontal passage.

Ridge of high pressure builds to the south,a west trough coast deepens down the west coast next weekend as an upper/middle level trough/disturbance arrives possibly bringing showers and thunderstorms and the formation of a low.

Tuesday September 25:

Mostly clear.

Chance of any rain:0%

Perth metropolitan area:

Mostly clear.Winds southwesterly at 15-25 km/h becoming south-southeasterly at 5-15 km/h at night.

Wednesday September 26:

8-21 Degrees Celsius

Partly cloudy.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Light winds tending southwesterly at 20-30 km/h during the afternoon becoming south-southeasterly at 10-20 km/h at night.

Thursday September 27:

8-23 Degrees Celsius

High clouds(partly cloudy).

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

High clouds(partly cloudy).Winds southeasterly at 15-25 km/h tending south-southwesterly at 20-30 km/h over coastal suburbs in the afternoon.

Friday September 28:

8-24 Degrees Celsius

High clouds(partly cloudy)

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

High clouds(partly cloudy).Winds easterly at 20-30 km/h.

Saturday September 29:

12-25 Degrees Celsius

Showers.

Chance of any rain:50%

Amount:0 to 2 mm.

Perth metropolitan area:

Partly to mostly cloudy.A medium(50%) chance of showers.The chance of a thunderstorm.Winds easterly at 20-35 km/h.

Sunday September 30:

13-23 Degrees Celsius

Showers,possible thunderstorms.

Chance of any rain:60%

Amount:0 to 4 mm.

Perth metropolitan area:

Partly to mostly cloudy.A medium(60%) chance of showers and thunderstorms.Light winds shifting southwesterly at 10-25 km/h during the day.

Monday October 1:

11-23 Degrees Celsius

Partly to mostly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Partly to mostly cloudy.A slight(20%) chance of a shower.Winds southeasterly at 10-25 km/h.

Tuesday October 2:

12-23 Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.A slight(20%) chance of a shower most likely in the afternoon.Winds southeasterly at 10-20 km/h.

Charts:

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 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).

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.