7 day weather forecast

Effective as of 4:00 AM Tuesday May 4 2021

Explanatory notes:

Upper level divergence and elevated instability ahead of the upper level disturbance coupled with the deepening trough off the west coast with moist low level air brings rain, showers and thunderstorms today.

Isolated cells are possible early before rain, shower and thunderstorm activity becomes more widespread from around the middle of the day/ late morning.

Thunderstorm activity possible until Wednesday morning where once the upper level disturbance and surface trough move to the east, thunderstorm chances diminish but showers are still expected in the moist onshore flow.

During Thursday, another upper level trough and associated upper level cold pool approaches from the west bringing showers and possible thunderstorms.

Ridge of high pressure builds to the south thereafter leading to fine conditions.

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Tuesday May 4:

City:

16-23  Degrees Celsius

Showers and thunderstorms.

Chance of any rain:95%

Amount:5 to 15 mm

Perth Metropolitan Area:

​Partly to mostly cloudy.A very high (95%) chance of rain, showers and thunderstorms.Winds east-northeasterly at 20-30 km/h becoming northeasterly in the morning easing to 15-25 km/h in the afternoon.Gusty winds and heavy falls possible with thunderstorms.

Wednesday May 5:

City:

15-23  Degrees Celsius

Showers.Early thunderstorms.

Chance of any rain:95%

Amount:5  to 15 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A very high (90%) chance of showers and thunderstorms early easing to a high (80%) chance of showers from morning.Heavy falls possible with thunderstorms early.Winds north-northeasterly at 15-25 km/h becoming northwesterly by morning shifting west-northwesterly by late morning becoming light later at night.

Thursday May 6:

City:

14-21  Degrees Celsius

Showers.

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 thudnerstorm.Light winds.

Friday May 7:

City:

11-21  Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.A slight(20%) chance of a shower most likely near the coast.Winds east-southeasterly at 10-20 km/h tending south-southwesterly in the afternoon.

Saturday May 8:

City:

9-22  Degrees Celsius

Partly cloudy.

Chance of any rain:10%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.Light winds tending southwesterly at 10-20 km/h in the afternoon.

Sunday May 9:

City:

9-22  Degrees Celsius

Partly cloudy.

Chance of any rain:10%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.Light winds tending southwesterly at 10-20 km/h in the afternoon.

Monday May 10:

City:

10-24  Degrees Celsius

Partly cloudy.

Chance of any rain:0%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.Winds easterly at 10-20 km/h becoming light in the afternoon.

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).