7 day weather forecast

Effective as of 12:00 AM Sunday September 30

Explanatory notes:

An upper/middle level trough/disturbance brought a rainband on Saturday morning,with showers and thunderstorms.The slight chance of showers and thunderstorms to move in from the north early today.

The upper/middle level trough/disturbance moves inland thereafter,possible showers and thunderstorms clearing.

Another upper/middle level disturbance moves across the region on Tuesday bringing the possibility of showers and thunderstorms.

Another west coast trough possibly deepens near the west coast from Wednesday with another upper/middle level trough/disturbance arriving likely bringing showers and thunderstorms on Thursday.

Sunday September 30:

11-22 Degrees Celsius

Possible early shower or thunderstorm.

Chance of any rain:30%

Amount:0 to 1 mm.

Perth metropolitan area:

A slight(30%) chance of a shower or thunderstorm clearing to mostly sunny conditions by morning.Light winds shifting southwesterly at 20-30 km/h from late morning becoming south-southeasterly at 15-25 km/h at night.

Monday October 1:

11-21 Degrees Celsius

Mostly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Mostly cloudy.A slight(20%) chance of a shower,most likely over the hills.Winds south-southeasterly at 10-20 km/h tending southwesterly at 15-25 km/h in the afternoon.

Tuesday October 2:

10-22 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 1 mm.

Perth metropolitan area:

Partly cloudy.A slight(30%) chance of a shower.The chance of a thunderstorm.Winds southeasterly at 15-25 km/h.

Wednesday October 3:

10-23 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 showers.Winds east-southeasterly at 20-30 km/h.

Thursday October 4:

12-23 Degrees Celsius

Showers.Possible thunderstorm.

Chance of any rain:70%

Amount:1 to 5 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(70%) chance of showers.The chance of thunderstorms.Winds easterly at 20-30 km/h becoming northerly later.

Friday October 5:

13-22 Degrees Celsius

Shower or two.

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 westerly at 10-25 km/h.

Saturday October 6:

12-22 Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.A slight(20%) chance of showers.Winds southerly at 15-25 km/h tending southwesterly at 20-30 km/h during the afternoon.

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.