7 day weather forecast

Effective as of 4:00 AM Sunday April 25 2021

Explanatory notes:

Perth (and the Peel region) is in the second day of lockdown. Follow the latest update at https://www.facebook.com/MarkMcGowanMP .

The west coast trough moved inland on Saturday afternoon, the moist marine layer has advected inland hence the possibility of fog and low cloud early today, most likely over the far southern suburbs and also over the far northern suburbs with Himawari-8 night microphysics imagery at 4 AM showing fog and low cloud north of Joondalup and south of Mandurah.

Warm afternoons over the next few days with the warm air mass over the region with the west coast trough remaining very near the coast and moving back and forth but cool to cold mornings given the lengthening nights as the season progresses.

I have increased the maximum temperature forecast for Monday Tuesday relative to OCF guidance taking into account today's maximum temperatures as a similar pattern is expected then with 850 hPa temperatures even slightly warmer though possibly an earlier sea breeze, particularly on Tuesday.

Possible smoke haze at times with prescribed burning activities.

A significant cold front or low pressure system is likely to move over the region on Friday or the slight possibility of late on Thursday with a cold air mass over the region thereafter but as usual some uncertainty on the details this far out.

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ANZAC Day:

City:

12-27  Degrees Celsius

Mostly sunny.

Chance of any rain:0%

Amount:Nil.

Perth Metropolitan Area:

Mostly sunny.The chance of fog early most likely over the far north and far south.Light winds tending south-southwesterly at 10-20 km/h during the afternoon.

Monday April 26:

City:

13-31  Degrees Celsius

Partly cloudy.

Chance of any rain:0%

Amount:Nil.

Perth Metropolitan Area:

Partly cloudy.High clouds.Light easterly winds tending south-southwesterly at 10-20 km/h during the afternoon becoming light at night.

Tuesday April 27:

City:

13-29  Degrees Celsius

Partly cloudy.

Chance of any rain:5%

Amount:Nil.

Perth Metropolitan Area:

Partly cloudy.Light winds tending south-southwesterly at 10-20 km/h during the afternoon becoming southeasterly at night.

Wednesday April 28:

City:

14-29  Degrees Celsius

Partly cloudy.

Chance of any rain:5%

Amount:Nil.

Perth Metropolitan Area:

Partly cloudy.Winds east-southeasterly at 10-20 km/h tending south-southwesterly at 15-25 km/h during the afternoon.

Thursday April 29:

City:

14-29  Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:Nil.

Perth Metropolitan Area:

Partly cloudy.A slight(20%) chance of showers most likely from afternoon.Light winds tending westerly at 10-20 km/h during the afternoon.

Friday April 30:

City:

15-23  Degrees Celsius

Showers.

Chance of any rain:80%

Amount:4 to 20 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A high(80%) chance of showers.The chance of a thunderstorm.Winds north-northeasterly at 10-20 km/h shifting northwesterly at 25-40 km/h during the day shifting westerly later during the day.

Saturday May 1:

City:

12-21  Degrees Celsius

Possible shower or two.

Chance of any rain:40%

Amount:0 to 2 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A medium(40%) chance of showers.The chance of a thunderstorm.Winds southwesterly 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).