Explanatory notes:
Scroll down below this section for forecast.
Figure 3.Mean Sea Level Pressure(MSLP) analysis with infrared greyscale satellite image at 12 UTC(8 PM local time yesterday).Image courtesy of the Australian Bureau of Meteorology(BOM).
A west coast trough formed near the west coast today l having lead to some warm air advection.
The west coast trough moves inland from Thursday afternoon with strong sea breezes expected on Friday in the afternoon and evening as the southerly pressure gradient "bends" with solar heating.
Easterly pressure gradient rapidly reestablishes over the region with a strong subtropical high pressure system moving to lie south of the region.
West coast trough deepens near the west coast again early next week leading to some warm air advection before moving inland again from Tuesday.
The west coast trough moves inland from Thursday afternoon with strong sea breezes expected on Friday in the afternoon and evening as the southerly pressure gradient "bends" with solar heating.
Easterly pressure gradient rapidly reestablishes over the region with a strong subtropical high pressure system moving to lie south of the region.
West coast trough deepens near the west coast again early next week leading to some warm air advection before moving inland again from Tuesday.
This is the first summer without a 40+ Degree day at the Perth metro station since the summer of 2001-2002.
The rest of Wednesday February 28:
Clear.Winds south-southwesterly at 20-30 km/h in the afternoon and evening over the western half of the area becoming east-southeasterly at 10-20 km/h at night.
Thursday March 1:
Thursday March 1:
Sunny.Winds east-southeasterly at 10-20 km/h becoming south-southwesterly at 20-30 km/h from afternoon easing to 15-25 km/h at night.
Friday March 2:
Friday March 2:
Sunny.Winds southerly at 15-25 km/h tending south-southwesterly at 25-40 km/h in the afternoon and evening becoming south-southeasterly at 15-25 km/h at night.
Saturday March 3:
Saturday March 3:
Sunny.Winds east-southeasterly at 15-25 km/h tending south-southeasterly at 10-20 km/h in the afternoon and evening.
Sunday March 4:
Sunday March 4:
Mostly sunny.Winds east-southeasterly at 20-30 km/h tending at 10-20 km/h in the afternoon and evening.
Monday March 5:
Monday March 5:
Partly cloudy.Winds east to northeasterly at 20-30 km/h tending 10-20 km/h from afternoon.
Tuesday March 6:
Tuesday March 6:
Mostly sunny.Winds northeasterly at 20-30 km/h becoming west-northwesterly from around the middle of the day becoming southwesterly and light at night.
Wednesday March 7:
Wednesday March 7:
Mostly sunny.Light winds becoming southwesterly at 15-25 km/h from afternoon becoming light at night.
Forecast produced at 5:30 PM Wednesday February 28.Weather icons courtesy of the US National Weather Service.



