7 day weather forecast

Effective as of 12:00 AM Thursday October 18

Explanatory notes:



A cold frontal passage early on Thursday bringing showers,deep cold air mass thereafter,brings showers,possible thunderstorms.Westerly flow thereafter likely leads to possibly further showers on Friday and Saturday,another cold frontal passage is likely on Sunday bringing showers,

Thursday October 18:

13-18 Degrees Celsius

Showers.Possible thunderstorm.

Chance of any rain:100%

Amount:5 to 15 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(100%) chance of showers.The chance of a thunderstorm and/or small hail.Winds westerly at 25-40 km/h becoming southwesterly from afternoon.

Friday October 19:

10-19 Degrees Celsius

Possible shower or two.

Chance of any rain:40%

Amount:0 to 0.4 mm.

Perth metropolitan area:

Partly to mostly cloudy.A medium(40%) chance of showers.Light winds tending southwesterly at 10-20 km/h during the day.

Saturday October 20:

11-21 Degrees Celsius

Showers.

Chance of any rain:60%

Amount:0 to 1 mm.

Perth metropolitan area:

Mostly cloudy.A medium(60%) chance of  showers.Winds west-northwesterly at 20-30 km/h.

Sunday October 21:

14-20 Degrees Celsius

Showers.

Chance of any rain:90%

Amount:1 to 4 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(90%) chance of showers.Winds westerly at 20-35 km/h becoming southwesterly later during the day.

Monday October 22:

11-20 Degrees Celsius

Partly to mostly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Partly to mostly cloudy.A slight(20%) chance of a shower.Winds southwesterly at 15-25 km/h.

Tuesday October 23:

8-21 Degrees Celsius

Mostly sunny.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny.A slight(20%) chance of a shower.Light winds tending west-southwesterly at 10-20 km/h during the day.

Wednesday October 24:

12-21 Degrees Celsius

Possible showers.

Chance of any rain:50%

Amount:0 to 2 mm.

Perth metropolitan area:

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

Charts:

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 3.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).

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.