7 day weather forecast

 Effective as of 4:00 PM Sunday November 7 2021

View the latest severe weather warnings from BOM at http://www.bom.gov.au/wa/warnings/ .

Explanatory notes:

On Monday, the possibility of showers and thunderstorms from afternoon with an unstable atmosphere with steep vertical lapse rates ahead of an upper level disturbance. Most likely surface based in the afternoon with solar heating, most likely inland of the sea breeze front, then elevated showers and thunderstorms possible thereafter as the upper level disturbance interacts with the moisture lifted by the earlier surface convection. This elevated convective activity continues until early on Tuesday with a rainband and some showers also developing to the north, extending into the metropolitan area. Also the possibility of gusts in excess of 70 km/h over the hills and foothills on Monday night and early on Tuesday with a the tight pressure gradient and katabatic effect.

Thunderstorm chances ease by Tuesday morning with vertical lapse rates becoming less steep due to cooler air moving in from the southeast in the lower levels and also cooling of the lower levels by the rain. Showers continue ahead of the upper level disturbance with plenty of clouds with moist low level air.

Fine conditions from Tuesday evening as the upper level disturbance moves to the east with fine conditions continuing through the end of the forecast period with subtropical high pressure to the south.

Sunday November 7:

City:

10-24  Degrees Celsius

Partly cloudy.

Chance of any rain:0%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.Winds east-southeasterly at 10-20 km/h tending south-southwesterly at 25-40 km/h in the afternoon, southeasterly at 20-30 km/h night.Strong gusts possible with the sea breeze in the afternoon over coastal and riverside suburbs.

Monday November 8:

City:

12-27  Degrees Celsius

Possible PM showers and thunderstorms.

Chance of any rain:40%

Amount:0 to 3 mm

Perth Metropolitan Area:

Partly cloudy.A medium (40%) chance of showers and thunderstorms most likely from afternoon.Winds east-southeasterly at 15-25 km/h tending southerly over western suburbs in the afternoon, east-southeasterly at 20-35 km/h at night.Gusts in excess of 70 km/h possible over the hills and foothills at night.

Tuesday November 9:

City:

12-22  Degrees Celsius

Rain and showers.Possible early thunderstorms.

Chance of any rain:70%

Amount:0 to 10 mm

Perth Metropolitan Area:

Cloudy.A high(70%) chance of rain and showers especially over northern suburbs, clearing in the afternoon.The chance of thunderstorms in the early hours.Winds east-southeasterly at 20-30 km/h easing to 10-20 km/h at night.Gusts in excess of 70 km/h possible over the hills and foothills early.

Wednesday November 10:

City:

10-23  Degrees Celsius

Mostly sunny.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

Mostly sunny.Winds east-southeasterly at 10-20 km/h tending south-southwesterly at 20-30 km/h in the afternoon and evening.

Thursday November 11:

City:

10-24  Degrees Celsius

Mostly sunny.

Chance of any rain:0%

Amount:Nil

Perth Metropolitan Area:

Mostly sunny.Winds easterly at 15-25 km/h tending south-southwesterly in the afternoon.

Friday November 12:

City:

11-26  Degrees Celsius

Partly cloudy.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.Winds easterly at 20-30 km/h tending south-southwesterly at 15-25 km/h in the afternoon.

Saturday November 13:

City:

12-28  Degrees Celsius

Mostly sunny.

Chance of any rain:0%

Amount:Nil

Perth Metropolitan Area:

Mostly sunny.Winds east-southeasterly at 10-20 km/h tending south-southwesterly at 15-25 km/h in the afternoon.

Sunday November 14:

City:

14-31  Degrees Celsius

Mostly sunny.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

Mostly sunny.Winds east-southeasterly at 15-25 km/h tending south-southwesterly in the afternoon.

Figure 1.Surface synoptic chart.Image courtesy of the Australian Bureau of Meteorology(BOM).

Figure 3.Mean Sea Level Pressure(MSLP) analysis with infrared greyscale satellite image. Image courtesy of the Australian Bureau of Meteorology(BOM)

Figure 4:Surface synoptic prognosis.Image courtesy of the Australian Bureau of Meteorology(BOM).

No liabilities held from information consumed on this site. Weather icons are from the US National Weather Service.Some information on this site is from the Australian Bureau of Meteorology (BOM).