7 day weather forecast

Effective as of 4:20 PM Monday September 24

Explanatory notes:

Radiational cooling of moist low level air overnight lead to low clouds and areas of fog.Similar conditions tonight and early on Tuesday.

Cooler air mass moves over the region tomorrow,morning shower or two with a weak cold frontal passage.

Ridge of high pressure builds south thereafter,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.

Th rest of Monday September 24:

Mostly clear.

Chance of any rain:0%

Perth metropolitan area:

Mostly clear.Winds southwesterly at 10-20 km/h becoming light at night.

Tuesday September 25:

10-21 Degrees Celsius

Morning shower or two.

Chance of any rain:50%

Amount:0 to 1 mm.

Perth metropolitan area:

Areas of fog possible early.A medium(50%) chance of morning showers.Mostly sunny thereafter.Light winds tending southwesterly at 15-25 km/h between late morning and evening 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:

7-22 Degrees Celsius

High clouds(mostly sunny).

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

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

Friday September 28:

8-23 Degrees Celsius

High clouds(mostly sunny)

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

High clouds(mostly sunny).Winds east-southeasterly at 15-30 km/h.

Saturday September 29:

11-23 Degrees Celsius

Possible showers and thunderstorms.

Chance of any rain:40%

Amount:0 to 2 mm.

Perth metropolitan area:

Partly to mostly cloudy.A medium(40%) chance of showers and thunderstorms.Winds easterly at 20-35 km/h.

Sunday September 30:

13-22 Degrees Celsius

Possible showers and thunderstorms.

Chance of any rain:50%

Amount:0 to 3 mm.

Perth metropolitan area:

Partly to mostly cloudy.A medium(50%) chance of showers and thunderstorms.Light winds shifting southwesterly at 10-25 km/h during the day.

Monday October 1:

11-21 Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.A slight(20%) chance of a shower.Winds southeasterly at 10-25 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.