Weather forecast for Perth effective as of 4:00 PM Friday July 13

Weather forecast for Perth effective as of 4:00 PM Friday July 13
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).

A cold frontal passage on Saturday PM bringing showers and also possible thunderstorms with instability.Gusty winds also likely with the passage of the cold front.With the upper level trough and deep cold air mass,small hail is possible.

Plenty of showers on Sunday and Monday with a cold and unstable southwesterly air stream.

The rest of Friday July 13:

City:

Partly cloudy.

Chance of any rain:10%

Perth metropolitan area:

Partly cloudy.Winds southwesterly at 10-20 km/h becoming light at night.

Saturday July 14:

City:

8-18 Degrees Celsius

Showers.Becoming windy.Possible PM thunderstorm.

Chance of any rain:100%

Amount:8 to 20 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(100%) chance of showers.The chance of thunderstorms with possible small hail in the late afternoon/evening.Light winds becoming west-northwesterly at 20-35 km/h from late morning becoming westerly at 30-45 km/h in the late afternoon becoming southwesterly from evening easing to 15-25 km/h later at night.Wind gusts in excess of 65 km/h possible from late afternoon.

Sunday July 15:

City:

8-18 Degrees Celsius

Showers.

Chance of any rain:90%

Amount:1 to 3 mm.

Perth metropolitan area:

Mostly cloudy.A very high(90%) chance of showers.Winds west-southwesterly at 20-30 km/h.

Monday July 16:

City:

12-19 Degrees Celsius

Showers.

Chance of any rain:90%

Amount:2 to 4 mm.

Perth metropolitan area:

Mostly cloudy.A very high(90%) chance of showers.Winds west-southwesterly at 20-30 km/h.

Tuesday July 17:

City:

7-19 Degrees Celsius

Possible shower.

Chance of any rain:40%

Amount:0 to 1 mm.

Perth metropolitan area:

Partly cloudy.A medium(40%) chance of showers.Winds west-southwesterly at 15-25 km/h.

Wednesday July 18:

City:

8-18 Degrees Celsius

Shower or two.

Chance of any rain:50%

Amount:0 to 1 mm.

Perth metropolitan area:

Partly cloudy.A medium(50%) chance of showers.Winds southwesterly at 10-20 km/h.

Thursday July 19:

City:

7-20 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 1 mm.

Perth metropolitan area:

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

Friday July 19:

City:

9-21 Degrees Celsius

Showers.

Chance of any rain:70%

Amount:1 to 8 mm.

Perth metropolitan area:

Partly cloudy.A high(70%) chance of showersThe chance of a thunderstorm from afternoon.Winds 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.