Weather forecast for Perth effective as of 12:00 AM Tuesday July 17

Weather forecast for Perth effective as of 12:00 AM Tuesday July 17
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).

Tomorrow partly to mostly cloudy in a west-northwesterly airstream but likely dry during the day with subsidence inversion capping the clouds,possible showers at night as subsidence inversion height increases.

On Wednesday a weak cold front will brush the region bringing showers.

Another cold frontal passage is likely late on Friday/early on Saturday.

Strong winds with strengthening westerly pressure gradient on Sunday and Monday.

Tuesday July 17:

City:

8-18 Degrees Celsius

Possible night shower.

Chance of any rain:30%

Amount:0 to 0.2 mm.

Perth metropolitan area:

Partly to mostly cloudy.A slight(30%) chance of showers at night.Light winds becoming west-northwesterly at 20-30 km/h from late morning becoming westerly at 15-25 km/h at night.

Wednesday July 18:

City:

12-19 Degrees Celsius

Showers.

Chance of any rain:90%

Amount:0.4 to 3 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(90%) chance of showers.Winds westerly at 15-25 km/h becoming southwesterly from afternoon becoming light at night.

Thursday July 19:

City:

6-18 Degrees Celsius

Partly cloudy.

Chance of any rain:10%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Winds northeasterly at 10-20 km/h.

Friday July 19:

City:

6-21 Degrees Celsius

Night showers.

Chance of any rain:70%

Amount:0.4 to 3 mm.

Perth metropolitan area:

Mostly sunny morning.A high(70%) chance of showers from evening.Winds north-northeasterly at 10-20 km/h becoming northwesterly at 20-30 km/h in the afternoon easing to 10-25 km/h at night.

Saturday July 20:

City:

12-19 Degrees Celsius

Rain,showers.

Chance of any rain:95%

Amount:5 to 15 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(95%) chance of rain and showers.The chance of a thunderstorm.Winds west-northwesterly at 15-25 km/h.

Sunday July 21:

City:

12-18 Degrees Celsius

Showers.Becoming windy.

Chance of any rain:95%

Amount:4 to 10 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(95%) chance of showers.Winds west-northwesterly at 25-40 km/h increasing to westerly at 35-50 km/h at night.Gusty winds likely at night.

Monday July 22:

City:

11-18 Degrees Celsius

Windy with showers.

Chance of any rain:90%

Amount:4 to 10 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(90%) chance of showers.Winds westerly at 35-50 km/h.Gusty winds likely.

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.