Weather forecast for Perth effective as of 12:00 AM Wednesday September 12

Weather forecast for Perth effective as of 12:00 AM Wednesday September 12
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).

Perth experienced the wettest August in 50 years with 186.0 mm of rain so far!It was also the wettest winter month since June 2005 and the wettest winter in 15 years!

A cold front moved across the region on Monday.

A weak cold front could brush the region on Thursday.

A west coast trough lies builds near the west coast during the weekend,moves inland on Sunday,some uncertainty on the precise synoptic conditions thereafter with large variation between model and model ensembles.

Wednesday September 12:

City:

7-18 Degrees Celsius

Possible light shower.

Chance of any rain:30%

Amount:0 to 0.2 mm.

Perth metropolitan area:

Cloudy.A slight(30%) chance of a light shower or drizzle most likely in the afternoon.Light winds tending westerly at 10-20 km/h in the afternoon.

Thursday September 13:

City:

10-19 Degrees Celsius

Showers.

Chance of any rain:60%

Amount:0 to 2 mm.

Perth metropolitan area:

Cloudy.A medium(60%) chance of showers.Winds westerly at 15-25 km/h becoming southwesterly at night.

Friday September 14:

City:

9-18 Degrees Celsius

Clouds decreasing.

Chance of any rain:30%

Amount:0 to 0.4 mm.

Perth metropolitan area:

Cloudy becoming partly cloudy in the afternoon.A slight(30%) chance of showers in the early hours.Winds south-southwesterly at 15-25 km/h.

Saturday September 15:

City:

5-20 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds east-northeasterly at 10-20 km/h.

Sunday September 16:

City:

7-20 Degrees Celsius

Mostly sunny.

Chance of any rain:10%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny.Winds south-southwesterly at 15-25 km/h.

Monday September 17:

City:

7-20 Degrees Celsius

Partly cloudy.

Chance of any rain:10%

Amount:0 mm.

Perth metropolitan area:

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

Tuesday September 18:

City:

7-20 Degrees Celsius

Partly cloudy.

Chance of any rain:10%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Light winds tending southwesterly at 15-25 km/h during the day.

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.