7 day weather forecast

Effective as of 4:00 AM Sunday May 9 2021

Explanatory notes:

The slight chance of fog and mist early today with radiational cooling of moist cool low level air.

A week trough brings some cloud with just the slight chance of a shower over the southern suburbs in the afternoon.

The slight chance of fog and mist early on Monday too if easterly Atlantic winds are sufficiently light .

Otherwise, with the subtropical high pressure ridge slightly to the south, fine conditions.

Progressively warmer afternoons until Tuesday with warm air advection as the high moves into the Great Australian Bight.

A cold front likely moves over the region from the south on Wednesday bringing a colder air mass over the region with a strong high pressure system, building to the southwest leading to breezy east-southeasterly winds thereafter. Still some uncertainty on the details this far out.

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Sunday May 9:

City:

9-22  Degrees Celsius

Partly cloudy.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.The slight chance of a shower in the south in the afternoon.Light winds tending south-southwesterly at 10-20 km/h in the afternoon, south-southeasterly at night.

Monday May 10:

City:

11-25  Degrees Celsius

Mostly sunny.

Chance of any rain:0%

Amount:Nil

Perth Metropolitan Area:

Mostly sunny.Light winds becoming east-northeasterly at 10-20 km/h in the morning becoming light from late afternoon.

Tuesday May 11:

City:

13-27  Degrees Celsius

Partly cloudy.

Chance of any rain:0%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.High clouds.Winds northeasterly at 15-25 km/h becoming light in the afternoon.

Wednesday May 12:

City:

14-22  Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 1 mm

Perth Metropolitan Area:

Partly cloudy.A slight(30%) chance of showers.Light winds becoming south-southeasterly at 20-30 km/h during the day becoming southeasterly at 15-25 km/h at night.

Thursday May 13:

City:

9-20  Degrees Celsius

Partly cloudy.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.Winds east-southeasterly at 15-30 km/h.

Friday May 14:

City:

10-22  Degrees Celsius

Partly cloudy.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.Winds easterly at 15-30 km/h.

Saturday May 15:

City:

12-23  Degrees Celsius

Partly cloudy.

Chance of any rain:10%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.Winds east-northeasterly at 20-30 km/h.

Charts:

                                   

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

 2. 

Figure 2.Key features identified on True Colour RGB satellite image.Satellite image courtesy of the Japanese Meteorological Agency(JMA).

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).