Explanatory notes:
Scroll down below this section for forecast.
Figure 3.Mean Sea Level Pressure(MSLP) analysis with infrared greyscale satellite image at 06 UTC(2 PM local time yesterday).Image courtesy of the Australian Bureau of Meteorology(BOM).
Light winds overnight last night with boundary layer decoupling as predicted lead to minimum temperatures lower than the OCF.
With the west coast trough inland a sea breeze has been over the region for the past few hours.Shallow convective clouds formed over the hills.The marine layer is advecting over the region.Marine layer clouds from evening.The chance of areas of fog early on Friday in the north with lighter winds.High amounts of marine layer low clouds possibly limits the potential for fog with suppressed radiational cooling.
The slight chance of showers or drizzle most likely in the early hours and morning over coastal suburbs.
Strengthening southeasterly pressure gradient on Friday with low clouds from the southeast extending over the region.
The west coast trough deepens near the west coast on Saturday leading to some warm air advection however,moist air over the northwest of the state will limit how hot it will be.
The medium chance of showers and thunderstorms on Sunday with a deepening west coast trough and associated low level wind convergence with upper level divergence as well ahead of an upper/middle level trough/disturbance.
Cooler air mass lies over the region on Monday.Moist low level air leads to plenty of clouds,the slight chance of showers.
A weak cold front possibly brushes the region early on Tuesday but still plenty of uncertainty this far out.
Rapidly warning and drying conditions thereafter with a subtropical high pressure system to the south and a west coast trough forming near the west coast leading to some warm air advection.
Rapidly warning and drying conditions thereafter with a subtropical high pressure system to the south and a west coast trough forming near the west coast leading to some warm air advection.
The long spell with no 40+ Degree Days continues with the last 40+ Degree Day being Australia Day last year!With no 40+ Degree day within the forecast period,this summer will have no 40+ Degrees Day the first since the 2001-2002 summer!
The rest of Thursday February 22:
Partly cloudy.
Perth metropolitan area:
City:
Chance of any rain:0%
Perth metropolitan area:
Partly cloudy.Winds southwesterly at 15-25 km/h from afternoon easing to south-southwesterly at 5-15 km/h at night.
Friday February 23:
Perth metropolitan area:
Friday February 23:
City:
17-29 Degrees Celsius
Clouds decreasing.
Chance of any rain:10%
Rainfall amount:0 mm.
Perth metropolitan area:
Mostly cloudy becoming mostly sunny by late afternoon.A slight(20%) chance of a shower in the early hours and morning over coast suburbs.The chance of areas of fog in the north in the early hours and morning clearing by 8 AM.Winds south-southeasterly at 10-20 km/h increasing to 20-30 km/h from afternoon becoming east-southeasterly at night.
Saturday February 24:
Perth metropolitan area:
Saturday February 24:
City:
15-32 Degrees Celsius
Possible shower or thunderstorm at night.
Chance of any rain:30%
Rainfall amount:0 to 0.2 mm.
Perth metropolitan area:
Mostly sunny day.A slight(30%) chance of showers and/or thunderstorms at night.Winds east-southeasterly at 15-30 km/h becoming easterly in the morning.
Sunday February 25:
Perth metropolitan area:
Sunday February 25:
City:
20-28 Degrees Celsius
Showers and thunderstorms clearing later.
Chance of any rain:50%
Rainfall amount:0 to 3 mm.
Perth metropolitan area:
Partly cloudy.A medium(50%) chance of a showers and thunderstorms clearing by late afternoon.Winds northeasterly from afternoon becoming west to southwesterly at 10-20 km/h from late afternoon.
Monday February 26:
Perth metropolitan area:
Monday February 26:
City:
18-24 Degrees Celsius
Possible shower.
Chance of any rain:30%
Rainfall amount:0 to 0.2 mm.
Perth metropolitan area:
Partly to mostly cloudy.A slight(30%) chance of showers.Winds south-southwesterly at 10-20 km/h becoming west-southwesterly at 20-30 km/h from afternoon becoming south-southwesterly at 10-20 km/h.
Tuesday February 27:
Perth metropolitan area:
Tuesday February 27:
City:
15-25 Degrees Celsius
Possible predawn shower.
Chance of any rain:30%
Rainfall amount:0 to 1 mm.
Perth metropolitan area:
Partly cloudy.A slight(30%) chance of showers in the early hours.Winds south-southwesterly at 20-30 km/h becoming south-southeasterly at 10-20 km/h at night.
Wednesday February 28:
Perth metropolitan area:
Wednesday February 28:
City:
14-29 Degrees Celsius
Sunny.
Chance of any rain:0%
Rainfall amount:0 mm.
Perth metropolitan area:
Sunny.Winds east-southeasterly at 20-30 km/h tending south-southwesterly at 15-25 km/h in the afternoon and evening.
Thursday March 1:
Perth metropolitan area:
Thursday March 1:
City:
18-33 Degrees Celsius
Sunny.
Chance of any rain:0%
Rainfall amount:0 mm.
Perth metropolitan area:
Sunny.Winds easterly at 20-30 km/h easing to 10-20 km/h from afternoon.
Forecast produced at 4:20 PM Thursday February 22.Weather icons courtesy of the US National Weather Service.
