Explanatory notes:
Scroll down below this section for forecast.
Figure 5.Mean Sea Level Pressure(MSLP) analysis with infrared greyscale satellite image at 06 UTC(2 PM local time today).Image courtesy of the Australian Bureau of Meteorology(BOM).
The radiational cooling of the moist marine layer overnight brought the formation of areas of fog,mist and low clouds early this morning.
Southerly pressure gradient "bent" with solar heating during the day having lead to a significant sea breeze in the afternoon and evening
Weaker pressure gradients leading to lighter winds by Friday.
Marine layer advects inland again on Friday afternoon and the radiational cooling of the moist marine layer overnight bringing plenty of marine layer clouds.Some uncertainty on the mesoscale features on Saturday and cannot rule out a shower.
The subtropical high pressure ridge likely lies slightly to the north during the weekend.
During the next working week,a cold fronts possibly move through the region.
Southerly pressure gradient "bent" with solar heating during the day having lead to a significant sea breeze in the afternoon and evening
Weaker pressure gradients leading to lighter winds by Friday.
Marine layer advects inland again on Friday afternoon and the radiational cooling of the moist marine layer overnight bringing plenty of marine layer clouds.Some uncertainty on the mesoscale features on Saturday and cannot rule out a shower.
The subtropical high pressure ridge likely lies slightly to the north during the weekend.
During the next working week,a cold fronts possibly move through the region.
The rest of Wednesday April 4:
Perth metropolitan area:
City:
Clear.
Chance of any rain:0%
Perth metropolitan area:
Clear.Winds southwesterly at 20-30 km/h in the afternoon and evening becoming south-southwesterly at 10-20 km/h at night becoming east-southeasterly later at night.
Thursday April 5:
Perth metropolitan area:
Thursday April 5:
City:
16-29 Degrees Celsius
Mostly sunny.
Chance of any rain:0%
Amount:0 mm.
Perth metropolitan area:
Mostly sunny.Winds east-southeasterly at 5-15 km/h tending southwesterly at 15-25 km/h in the afternoon and evening becoming south-southwesterly at 5-15 km/h at night.
Friday April 6:
Perth metropolitan area:
Friday April 6:
City:
16-29 Degrees Celsius
Sunny day.
Chance of any rain:0%
Amount:0 mm.
Perth metropolitan area:
Sunny day,partly cloudy at night.Light winds becoming west-southwesterly at 10-20 km/h from afternoon becoming light at night.
Saturday April 7:
Perth metropolitan area:
Saturday April 7:
City:
17-25 Degrees Celsius
Partly cloudy.
Chance of any rain:20%
Amount:0 mm.
Perth metropolitan area:
Partly cloudy.A slight(20%) chance of a shower.Winds west-southwesterly at 10-25 km/h becoming south-southwesterly at 10-20 km/h at night.
Sunday April 8:
Perth metropolitan area:
Sunday April 8:
City:
15-25 Degrees Celsius
Partly cloudy.
Chance of any rain:20%
Amount:0 mm.
Perth metropolitan area:
Partly cloudy.A slight(20%) chance of a shower.Light winds becoming westerly at 10-20 km/h from afternoon.
Monday April 9:
Perth metropolitan area:
Monday April 9:
City:
15-24 Degrees Celsius
Possible shower.
Chance of any rain:30%
Amount:0 to 0.8 mm.
Perth metropolitan area:
Partly cloudy.A slight(30%) chance of showers.Winds west-southwesterly at 15-25 km/h.
Tuesday April 10:
Perth metropolitan area:
Tuesday April 10:
City:
14-23 Degrees Celsius
Possible shower.
Chance of any rain:30%
Amount:0 to 0.2 mm.
Perth metropolitan area:
Partly cloudy.A slight(30%) chance of showers.Winds southwesterly at 15-30 km/h.
Wednesday April 11:
Perth metropolitan area:
Wednesday April 11:
City:
15-23 Degrees Celsius
Possible showers.
Chance of any rain:40%
Amount:0 to 1 mm.
Perth metropolitan area:
Partly cloudy.A medium(40%) chance of showers.Winds southwesterly at 20-30 km/h.
Forecast produced at 4:20 PM Wednesday April 4.Weather icons courtesy of the US National Weather Service.
