Weather forecast for Perth effective as of 5:00 AM Wednesday July 25

Weather forecast for Perth effective as of 5:00 AM Wednesday July 25
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 2.The Australian Bureau of Meteorology(BOM) has issued a severe weather warning for damaging winds,abnormally high tides and damaging surf for parts of the southwest and south of the state including the Perth Metropolitan Area for Wednesday.Please see http://www.bom.gov.au/products/IDW21037.shtml for the latest severe weather warning.

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).

A strong cold frontal on Wednesday with strong pressure gradients and strong winds aloft bringing showers,strong,gusty winds and possible thunderstorms.Wind gusts in excess of 90 km/h possible,especially near the coast.Showers,strong,gusty winds and possible thunderstorms and/or small hail still possible in the cold pool behind the cold front with a low pressure system over the southwest of the state.

The Australian Bureau of Meteorology(BOM) has issued a severe weather warning for damaging winds,abnormally high tides and damaging surf for parts of the southwest and south of the state including the Perth Metropolitan Area for Wednesday.Please see http://www.bom.gov.au/products/IDW21037.shtml for the latest severe weather warning.

The strong winds and showers possibly extends into the early hours of Thursday behind the cold front.Conditions easing thereafter though some "anticyclone gloom".

A weak cold front  brushing the region on Friday and another weak cold front brushing the region on Sunday/Monday.

Wednesday July 25:

City:

11-18 Degrees Celsius

Windy with showers.Possible thunderstorm.
Severe weather warning in effect!See note!

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 thunderstorms from late morning.Possible small hail from late afternoon.Winds north-northwesterly at 15-30 km/h becoming northwesterly at 35-55 km/h by early afternoon becoming west-southwesterly at 30-45 km/h from late afternoon.Gusty winds from around the middle of the day,gusts exceeding 90 km/h possible especially near the coast.

Note:The Australian Bureau of Meteorology(BOM) has issued a severe weather warning for damaging winds,abnormally high tides and damaging surf for parts of the southwest and south of the state including the Perth Metropolitan Area for Wednesday.Please see http://www.bom.gov.au/products/IDW21037.shtml for the latest severe weather warning.

Thursday July 26:

City:

8-18 Degrees Celsius

Wind and showers easing.

Chance of any rain:70%

Amount:0.4 to 2 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(70%) chance of showers early easing to a slight(30%) chance by afternoon.Winds west-southwesterly at 30-45 km/h becoming light in the morning becoming south-southwesterly at 15-25 km/h from around the middle of the day becoming light at night.Gusty winds possible in the early hours.

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 west-southwesterly at 15-25 km/h from around the middle of the day becoming south-southwesterly at 5-15 km/h at night.

Saturday July 28:

City:

7-18 Degrees Celsius

Possible early shower or two.

Chance of any rain:40%

Amount:0 to 1 mm.

Perth metropolitan area:

Partly cloudy.A medium(40%) chance of showers in the early hours easing to a slight(20%) chance from morning.Light winds.

Sunday July 29:

City:

8-19 Degrees Celsius

Showers.

Chance of any rain:60%

Amount:0 to 3 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

Showers.

Chance of any rain:60%

Amount:0 to 2 mm.

Perth metropolitan area:

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

Tuesday July 31:

City:

6-19 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 0.4 mm.

Perth metropolitan area:

Partly to mostly cloudy.A slight(30%) chance of showers.Winds west-northwesterly at 10-20 km/h.

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.