7 day weather forecast

 Effective as of 4:00 AM Thursday April 29 2021

Explanatory notes:

Some smoke haze is present over the region from accumulated smoke haze from prescribed burns over the past few days, likely to clear in the morning with increased vertical mixing or by later in the afternoon with the passage of the cold front.

There were warm afternoons over the past few days with the warm air mass over the region but cool to cold mornings given the lengthening nights as the season progresses.

A final warm afternoon today prior to the arrival of a cold front.

A significant cold front will move over the region in the late afternoon/evening today.There is the possibility of thunderstorms with the cold frontal passage or with a pre-frontal rough with moist and unstable air ahead of the front.

A cold air mass over the region behind the cold front bringing further showers, showers likely clearing by mid morning on Friday with the high pressure ridge building to the south.

Fine conditions during the weekend with the subtropical high pressure ridge to the south.

A complex scenario towards the end of the forecast period with an upper level trough likely approaching from the west leading to possible rain, showers and thunderstorms but still plenty of uncertainty on the details this far out.

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Thursday April 29:

City:

15-26  Degrees Celsius

PM showers, possible thunderstorm.

Chance of any rain:100%

Amount:5 to 15 mm

Perth Metropolitan Area:

Partly to mostly cloudy with smoke haze early then a very high (100%) chance of showers with the chance of a thunderstorm from afternoon. Light winds becoming north-northwesterly at 10-20 km/h from morning becoming west-northwesterly at 20-30 km/h from around the middle of the day shifting west-southwesterly in the evening then later southwesterly at night.

Friday April 30:

City:

12-20  Degrees Celsius

Showers clearing.

Chance of any rain:60%

Amount:0 to 3 mm

Perth Metropolitan Area:

Partly cloudy.A medium (60%) chance of showers easing to a slight (20%) chance from morning.Winds south-southwesterly at 20-30 km/h becoming southeasterly at 10-20 km/h before dawn tending south-southwesterly at 15-25 km/h in the afternoon.

Saturday May 1:

City:

9-22  Degrees Celsius

Partly cloudy.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.Light winds tending east-northeasterly at 10-20 km/h in the morning, south-southwesterly at 10-20 km/h in the afternoon becoming southeasterly at night.

Sunday May 2:

City:

10-23  Degrees Celsius

Mostly sunny.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

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

Monday May 3:

City:

12-22  Degrees Celsius

Partly cloudy.

Chance of any rain:10%

Amount:Nil

Perth Metropolitan Area:

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

Tuesday May 4:

City:

12-21  Degrees Celsius

Possible showers and thunderstorms.

Chance of any rain:50%

Amount:0 to 8 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A medium(50%) chance of showers and thunderstorms.Winds northeasterly at 20-30 km/h becoming northerly later during the day.

Wednesday May 5:

City:

12-22  Degrees Celsius

Showers.

Chance of any rain:60%

Amount:0 to 8 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A medium(60%) chance of showers.The chance of a thunderstorm.Winds 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).