Weather forecast for Perth effective as of 4:20 PM Thursday September 13

Weather forecast for Perth effective as of 4:20 PM Thursday September 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).

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 weak cold front will brush the region tonight,moist westerly air stream brought showers and drizzle through the day before the frontal passage.


Form the weekend summer like synoptic situation,but much cooler.

A west coast trough lies builds near the west coast during the weekend,moves inland on Sunday,lies inland until the end of the forecast period.

The rest of Thursday September 13:

City:

Showers.

Chance of any rain:80%

Perth metropolitan area:

Partly to mostly cloudy.A high(80%) chance of showers and drizzle.Winds westerly at 15-25 km/h becoming southwesterly at night.

Friday September 14:

City:

10-17 Degrees Celsius

Possible AM shower.

Chance of any rain:30%

Amount:0 to 0.2 mm.

Perth metropolitan area:

Cloudy becoming partly cloudy in the afternoon,clear at night.A slight(30%) chance of a shower in the early hours and morning.Winds south-southwesterly at 20-30 km/h becoming southeasterly at 15-25 km/h at night.

Saturday September 15:

City:

4-19 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds east-northeasterly at 10-20 km/h becoming light from afternoon.

Sunday September 16:

City:

4-19 Degrees Celsius

Mostly sunny.

Chance of any rain:5%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny.Winds south-southeasterly at 5-15 km/h tending south-southwesterly at 20-30 km/h from late morning becoming southeasterly at 15-25 km/h at night.

Monday September 17:

City:

6-18 Degrees Celsius

Partly cloudy.

Chance of any rain:5%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Winds southeasterly at 10-20 km/h tending south-southwesterly at 20-30 km/h in the afternoon.

Tuesday September 18:

City:

6-19 Degrees Celsius

Mostly sunny.

Chance of any rain:5%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny.Light winds tending southwesterly at 20-30 km/h in the afternoon.

Wednesday September 19:

City:

8-21 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Light winds tending south-southwesterly at 10-20 km/h during the afternoon.

Thursday September 20:

City:

9-22 Degrees Celsius

Mostly sunny.

Chance of any rain:5%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny(high clouds possible).Light winds tending south-southwesterly at 10-20 km/h during the afternoon.

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.