Weather forecast for Perth effective as of 4:00 PM Wednesday July 25

Weather forecast for Perth effective as of 4:00 PM 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 passage is currently occuring as of 4 PM.Gusty winds occured at times,with gusts in excess of 70 km/h recorded on land,reaching 89 km/h on Rottnest Island.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 and damaging surf for parts of the southwest and south of the state including the Perth Metropolitan Area for Wednesday and early on Thursday.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 depending on the position of the low pressure system.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.

The rest of Wednesday July 25:

City:

Windy at times with rain,showers.Possible thunderstorm.

BOM severe weather warning in effect!See note!

Chance of any rain:100%

Perth metropolitan area:

Partly to mostly cloudy.A very high(100%) chance of rain and showers.The chance of thunderstorms.Possible small hail.Winds  northwesterly at 30-45 km/h becoming west-southwesterly from late afternoon.Gusty winds,gusts exceeding 70 km/h possible especially near the coast.

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

Thursday July 26:

City:

8-19 Degrees Celsius

Predawn showers.
BOM severe weather warning in effect!See note!

Chance of any rain:80%

Amount:0.4 to 2 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(80%) chance of showers early easing to a slight(20%) chance by morning.Winds west-southwesterly at 25-40 km/h easing to southerly at 5-15 km/h by sunrise becoming south-southwesterly at 15-25 km/h from around the middle of the day easing to southerly at 5-15 km/h back at night.Gusty winds possible in the early hours.

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

Friday July 27:

City:

9-18 Degrees Celsius

Showers.

Chance of any rain:90%

Amount:0.4 to 3 mm.

Perth metropolitan area:

Mostly cloudy.A high(90%) chance of showers most likely in the early hours and at night.Light winds becoming west-southwesterly at 10-20 km/h from around the middle of the day becoming light at night.

Saturday July 28:

City:

7-18 Degrees Celsius

Possible pre dawn 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 in the early hours easing to a slight(20%) chance from morning.Light winds.

Sunday July 29:

City:

8-19 Degrees Celsius

PM showers.

Chance of any rain:70%

Amount:0.4 to 3 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(70%) chance of showers from afternoon,most likely at night.Winds west-northwesterly at 10-20 km/h.

Monday July 30:

City:

9-18 Degrees Celsius

Showers.

Chance of any rain:70%

Amount:0.4 to 4 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(70%) chance of showers.Light winds.

Tuesday July 31:

City:

7-19 Degrees Celsius

Shower or two.

Chance of any rain:50%

Amount:0 to 1 mm.

Perth metropolitan area:

Partly to mostly cloudy.A medium(50%) chance of showers.Winds northwesterly at 15-25 km/h.

Wednesday August 1:

City:

10-18 Degrees Celsius

Showers

Chance of any rain:90%

Amount:5 to 15 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(90%) chance of showers.The chance of a thunderstorm.Winds west-southwesterly at 30-45 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.