7 day weather forecast

Effective as of 12:00 AM Tuesday October 16

Explanatory notes:



Ridge of high pressure leis over the region,cold morning with excellent radiational cooling overnight but rapidly warming day with a warm air mass aloft.

Dry and becoming warmer until Wednesday with a cold frontal passage early on Thursday bringing showers,deep cold air mass thereafter,brings showers,possible thunderstorms.Westerly flow thereafter likely leads to further showers on Friday and Saturday,another cold frontal passage is like on Sunday bringing showers,

Tuesday October 16:

8-26 Degrees Celsius

High clouds(mostly sunny).

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

High clouds(mostly sunny).Light winds tending south-southwesterly at 10-20 km/h in the afternoon.

Wednesday October 17:

14-29 Degrees Celsius

Sunny

Chance of any rain:5%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds northeasterly at 10-20 km/h becoming northwesterly by late morning becoming westerly at 16-25 km/h from afternoon.

Thursday October 18:

13-19 Degrees Celsius

Showers.Possible thunderstorm.

Chance of any rain:95%

Amount:5 to 15 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(95%) chance of showers.The chance of a thunderstorm.Winds westerly at 20-35 km/h becoming southwesterly later during the day.

Friday October 19:

11-19 Degrees Celsius

Possible shower or two.

Chance of any rain:40%

Amount:0 to 0.4 mm.

Perth metropolitan area:

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

Saturday October 20:

12-20 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

Possible shower or two.

Chance of any rain:40%

Amount:0 to 0.4 mm.

Perth metropolitan area:

Partly to mostly cloudyA medium(40%) chance of showers.Winds 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.