Weather forecast for Perth effective as of 5:00 PM Monday July 23

Weather forecast for Perth effective as of 5:00 PM Monday July 23
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).

With the subtropical high pressure ridge lying to the north continued showery weather today and also tomorrow ina  moist northwesterly air stream.

A strong cold frontal passage likely on Wednesday bringing showers,strong,gusty winds and possible thunderstorms.Wind gusts in excess of 80 km/h possible.

"Anticyclone gloom" likely on Thursday with a weak cold front  brushing the region on Friday and another weak cold front brushing the region on Sunday.

The rest of Monday July 23:

City:

Showers.

Chance of any rain:80%

Perth metropolitan area:

Partly to mostly cloudy.A high(80%) chance of showers.Winds westerly at 15-30 km/h easing to 10-25 km/h at night.

Tuesday July 24:

City:

11-20 Degrees Celsius

Showers.

Chance of any rain:90%

Amount:1 to 3 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(90%) chance of showers.Light winds becoming northwesterly at 10-20 km/h from afternoon becoming north-northwesterly at night.

Wednesday July 25:

City:

11-18 Degrees Celsius

Windy with showers.Possible thunderstorm.

Chance of any rain:100%

Amount:10 to 20 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(100%) chance of showers.The chance of a thunderstorm between late morning and late afternoon.Winds north-northwesterly at 20-30 km/h becoming northwesterly at 35-50 km/h from late forming becoming westerly and then southwesterly easing to 20-30 km/h at night.Gusty winds likely,gusts exceeding 80 km/h possible.

Thursday July 26:

City:

8-17 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 0.4 mm.

Perth metropolitan area:

Mostly cloudy.A slight(30%) chance of showers,most likely early.Winds south-southwesterly at 10-20 km/h becoming light from morning.

Friday July 27:

City:

8-18 Degrees Celsius

Showers.

Chance of any rain:60%

Amount:0 to 2 mm.

Perth metropolitan area:

Partly to mostly cloudy.A medium(60%) chance of showers.Light winds becoming westerly at 15-25 km/h from around the middle of the day becoming southwesterly at night.

Saturday July 28:

City:

7-18 Degrees Celsius

Possible shower

Chance of any rain:30%

Amount:0 to 0.4 mm.

Perth metropolitan area:

Partly cloudy.A slight(30%) chance of showers.Light winds.

Sunday July 29:

City:

8-19 Degrees Celsius

Showers.

Chance of any rain:60%

Amount:0 to 4 mm.

Perth metropolitan area:

Partly to mostly cloudy.A medium(60%) chance of showers.Winds west-northwesterly at 10-20 km/h.

Monday July 30:

City:

9-18 Degrees Celsius

Possible shower or two.

Chance of any rain:40%

Amount:0 to 1 mm.

Perth metropolitan area:

Partly to mostly cloudy.A medium(40%) 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.