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).
Showers occurred during the first half of Friday in a moist air stream with showers being enhanced by coastal land breeze convergence.
It was sunny from late afternoon as drier air aloft moved in from the northwest.
A pre frontal trough affects the region today bringing a medium chance of showers from afternoon.Higher chance in the far southwest(eg.Mandurah).Can't rule out a thunderstorm with some atmospheric instability.
The strongest cold front since spring last year moves over the region on Sunday morning associated with a complex low to the south bringing showers.The showers would bring plenty of rainfall,possibly heavy with plenty of low level moisture as indicated by dew points up to 18 Degrees Celsius expected.With 400 J/kg CAPE expected thunderstorms possible.
Post cold frontal showers affect the region thereafter with improving conditions from Tuesday as a ridge of high pressure builds to the south.
Saturday April 21:
City:
12-26 Degrees Celsius
Possible PM shower or two.
Chance of any rain:40%
Amount:0 to 1 mm.
Perth metropolitan area:
Mostly sunny morning.A slight(20%) chance of showers in the far southwest in the early hours and morning.A high(70%) chance of showers from afternoon in the far southwest,a medium(40%) chance elsewhere.The chance of a thunderstorm.Winds north-northeasterly at 10-20 km/h becoming north-northwesterly at 15-25 km/h from around the middle of the day becoming light at night.
Perth metropolitan area:
Sunday April 22:
City:
16-22 Degrees Celsius
Showers.Possible thunderstorm.
Chance of any rain:100%
Amount:5 to 20 mm.
Perth metropolitan area:
Partly to mostly cloudy.A very high(100%) chance of showers.The chance of thunderstorms.Heavy falls possible.Winds north-northeasterly at 10-20 km/h becoming northwesterly at 20-35 km/h from mid morning becoming west-northwesterly at 25-40 km/h from afternoon easing to 15-25 km/h at night.Wind gusts up to 65 km/h possible during the day.
Perth metropolitan area:
Monday April 23:
City:
16-22 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 west-southwesterly at 15-25 km/h becoming southwesterly from afternoon becoming light at night.
Perth metropolitan area:
Tuesday April 24:
City:
11-23 Degrees Celsius
Partly cloudy.
Chance of any rain:10%
Amount:0 mm.
Perth metropolitan area:
Partly cloudy.Light winds becoming south-southwesterly at 10-25 km/h from afternoon becoming south-southeasterly at 10-20 km/h at night.
Perth metropolitan area:
Wednesday April 25:
City:
11-25 Degrees Celsius
Sunny.
Chance of any rain:0%
Amount:0 mm.
Perth metropolitan area:
Sunny.Winds east-southeasterly at 10-20 km/h tending south-southwesterly at 10-25 km/h in the afternoon and evening.
Perth metropolitan area:
Thursday April 26:
City:
14-27 Degrees Celsius
Sunny.
Chance of any rain:0%
Amount:0 mm.
Perth metropolitan area:
Sunny.Winds east-northeasterly at 10-25 km/h becoming light from afternoon.
Perth metropolitan area:
Friday April 27:
City:
16-27 Degrees Celsius
Partly cloudy.
Chance of any rain:0%
Amount:0 mm.
Perth metropolitan area:
Partly cloudy.Winds east-northeasterly at 10-20 km/h becoming light from afternoon.
Forecast for today produced at 1:00 AM forecast for the rest of the days produced at 6:00 PM Friday April 20.Weather icons courtesy of the US National Weather Service.
