Effective as of 4:00 PM Saturday April 17 2021
Explanatory notes:
Some high and middle level cloud ahead of an upper level trough along with some smoke haze aloft from prescribed burning activities.
The subtropical high pressure ridge lies to the south with the west coast trough near the west coast, this results in easterlies in the morning and at night with prevailing east-northeasterly gradient flow but south-southwesterly sea breeze in the afternoon.
The west coast trough moves inland from Sunday afternoon with a weak cold front brushing the southwest of the state on Monday leading to some clouds around Perth but Perth will likely remain dry.
Thereafter, the subtropical high pressure ridge strengthens to the south again with a west coast trough likely deepening off the coast later during the work week with another upper level trough approaching from the west leading to some high and middle level clouds again but conditions are expected to be dry
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Possible smoke haze at times depending on prescribed burning activities.
The rest of Saturday April 17:
City:
Smoke haze.
Chance of any rain:0%
Perth Metropolitan Area:
Partly cloudy.High clouds.Smoke haze aloft.Winds east-southeasterly at 10-20 km/h tending south-southwesterly near the coast until early night.
Sunday April 18:
City:
13-28 Degrees Celsius
Sunny.
Chance of any rain:0%
Amount:Nil.
Perth Metropolitan Area:
Mostly sunny.High clouds.Smoke haze possible aloft depending on prescribed burning activities.Winds easterly at 10-20 km/h tending south-southwesterly at 15-25 km/h in the afternoon becoming southeasterly at night.
Monday April 19:
City:
12-24 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 in the afternoon.
Tuesday April 20:
City:
12-25 Degrees Celsius
Mostly sunny.
Chance of any rain:0%
Amount:Nil.
Perth Metropolitan Area:
Mostly sunny.Winds east-southeasterly at 10-20 km/h tending south-southwesterly at 15-30 km/h in the afternoon.
Wednesday April 21:
City:
12-26 Degrees Celsius
Mostly sunny.
Chance of any rain:0%
Amount:Nil.
Perth Metropolitan Area:
Mostly sunny.Winds southeasterly at 10-20 km/h.
Thursday April 22:
City:
13-27 Degrees Celsius
Partly cloudy.
Chance of any rain:0%
Amount:Nil.
Perth Metropolitan Area:
Partly cloudy.Winds easterly at 20-30 km/h becoming light in the afternoon.
Friday April 23:
City:
14-29 Degrees Celsius
Mostly sunny.
Chance of any rain:0%
Amount:Nil.
Perth Metropolitan Area:
Mostly sunny.Winds east-northeasterly at 15-25 km/h becoming light from afternoon.
Saturday April 24:
City:
15-31 Degrees Celsius
Mostly sunny.
Chance of any rain:0%
Amount:Nil.
Perth Metropolitan Area:
Mostly sunny.Winds east-northeasterly at 10-25 km/h tending northwesterly during the afternoon.
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Figure 1.Surface synoptic chart at 12 UTC(8 PM local time yesterday).Image courtesy of the Australian Bureau of Meteorology(BOM).
2.
Figure 2.Key features identified on True Colour RGB satellite image at around 06:00 UTC(2 PM local time yesterday).Satellite image courtesy of the Japanese Meteorological Agency(JMA).
local time yesterday).Image courtesy of the Australian Bureau of Meteorology(BOM)
Figure 4:Surface synoptic prognosis.Image courtesy of the Australian Bureau of Meteorology(BOM).
