7 day weather forecast

Effective as of 6:00 PM Sunday October 21

Explanatory notes:




A cold frontal passage around the middle of the day today.

"Anticyclone gloom" affects the region until afternoon tomorrow,cloudy with possible showers in the morning and early afternoon.

Some uncertain on the precise synoptic conditions on Wednesday with variation between models and model ensembles.

Significant afternoon sea breezes likely from Thursday with a south-southeasterly pressure gradient "bending" with solar heating.

The rest of Sunday October 21:

Becoming cloudy.

Chance of any rain:20%

Perth metropolitan area:

Partly cloudy becoming cloudy later at night.A slight(20%) chance of light showers.Winds southwesterly at 20-30 km/h.

Monday October 22:

14-20 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 0.4 mm.

Perth metropolitan area:

Cloudy becoming partly cloudy from late afternoon.A slight(30%) chance of showers clearing by late afternoon.Winds southwesterly at 10-25 km/h becoming south-southwesterly from late afternoon becoming light at night.

Tuesday October 23:

9-21 Degrees Celsius

Partly cloudy.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Light winds tending southwesterly at 15-25 km/h during the afternoon.

Wednesday October 24:

10-21 Degrees Celsius

Possible shower or two.

Chance of any rain:40%

Amount:0 to 3 mm.

Perth metropolitan area:

Partly to mostly cloudy.A medium(40%) chance of showers.Light winds becoming south-southwesterly at 10-20 km/h from afternoon.

Thursday October 25:

11-24 Degrees Celsius

High clouds(mostly sunny).

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

High clouds(mostly sunny).Winds south-southeasterly at 10-20 km/h tending southwesterly at 20-30 km/h during the afternoon.

Friday October 26:

12-24 Degrees Celsius

High clouds(mostly sunny).

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

High clouds(mostly sunny).Winds south-southeasterly at 10-20 km/h tending southwesterly at 20-30 km/h during the afternoon.

Saturday October 27:

12-25 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 10-20 km/h tending south-southwesterly at 15-25 km/h during the afternoon.

Sunday October 28:

12-27 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 15-25 km/h becoming light from 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.