Effective as of 4:00 PM Friday April 23 2021
Explanatory notes:
Premier Mark McGowan announced that Perth and the Peel Regionis going into lockdown from 12 AM tonight and masks are mandatory from 6 PM. Follow the latest update at https://www.facebook.com/MarkMcGowanMP .
Plenty of high and middle clouds over the region ahead of an upper level trough.
The west coast trough is deepening off the west coast with warm air advection and is expected to move slightly inland from Saturday afternoon, remaining very near the coast and moving back and forth, this means that the marine layer is expected to advect inland from Saturday afternoon, the possibility of fog and low cloud early on Sunday and Monday, fog most likely to the north of Ellenbrook on Sunday and over the south of the state early on Monday but still some uncertainty on the details.
Some smoke haze from prescribed burns is still possible but is less likely given that the gradient flow is northeasterly today and northwesterly from Saturday, any smoke haze then is likely to come prescribed burns to the north particularly over the Gnangara-moore River State Forest.
Warm afternoons over the next few days with the warm air mass over the region but cool to cold mornings given the lengthening nights as the season progresses.The west coast trough remains near the west coast until around Thursday.
A significant cold front is likely to move over the region towards the end of the forecast period but as usual uncertainty on the details this far out.
The rest of Friday April 23:
City:
Partly to mostly cloudy.
Chance of any rain:0%
Amount:Nil.
Perth Metropolitan Area:
Partly to mostly cloudy.High clouds.Winds south-southwesterly at 10-20 km/h becoming light at night.
Saturday April 24:
City:
15-28 Degrees Celsius
Partly cloudy.
Chance of any rain:10%
Amount:Nil.
Perth Metropolitan Area:
Partly cloudy.Light northeasterly winds winds tending southwesterly at 10-20 km/h in the afternoon becoming light at night.
Sunday April 25:
City:
13-27 Degrees Celsius
Mostly sunny.
Chance of any rain:0%
Amount:Nil.
Perth Metropolitan Area:
Mostly sunny.Light winds tending southwesterly at 10-20 km/h during the afternoon.
Monday April 26:
City:
12-29 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:
14-28 Degrees Celsius
Partly cloudy.
Chance of any rain:5%
Amount:Nil.
Perth Metropolitan Area:
Partly cloudy.Light winds tending southwesterly at 10-20 km/h in the afternoon.
Wednesday April 28:
City:
15-29 Degrees Celsius
Partly cloudy.
Chance of any rain:5%
Amount:Nil.
Perth Metropolitan Area:
Partly cloudy.Winds southeasterly at 10-20 km/h tending south-southwesterly at 15-25 km/h during the afternoon.