Effective as of 4:00 AM Saturday April 24 2021
Explanatory notes:
Perth (and the Peel region) has entered its first day of lockdown. 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.
As of 4 AM, a strong nocturnal inversion lies over much of the region as the boundary layer has large decoupled, should the boundary layer remain decoupled with light winds remaining near the surface temperatures will significantly below model and OCF guidance, cloud cover would limit some of the temperature drop though.
Plenty of high and middle clouds over the region ahead of an upper level trough. The very slight chance of an elevated shower or thunderstorm today but it should be mainly virga if any given the high cloud base and dry air below clouds.
The west coast trough is expected to move slightly inland this afternoon, remaining very near the coast and moving back and forth, this means that the marine layer is expected to advect inland from the afternoon, the slight possibility of fog and low cloud early on Sunday and Monday, fog most likely over the south of the state and to the north of Ellenbrook on Sunday and over the south of the state early on Monday but still some uncertainty on the details.
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.
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Saturday April 24:
City:
14-28 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.
Thursday April 29:
City:
15-28 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 from afternoon.Light winds becoming west-northwesterly at 10-20 km/h later during the day.