Effective as of 4:00 PM Monday May 3 2021
Explanatory notes:
Some smoke haze is currently present aloft from prescribed burns to the east.An upper level disturbance approaches from the west with a west coast trough deepening off the west coast.
Upper level divergence and elevated instability ahead of the upper level disturbance coupled with the deepening trough off the west coast with moist low level air brings rain, showers and thunderstorms on Tuesday.
Isolated cells are possible early before rain, shower and thunderstorm activity becomes more widespread from around the middle of the day.
Thunderstorm activity possible until Wednesday morning where once the upper level disturbance and surface trough move to the east, thunderstorm chances diminish but showers are still expected in the moist onshore flow.
During Thursday, another upper level trough and associated upper level cold pool approaches from the west bringing showers and possible thunderstorms.
Ridge of high pressure builds to the south thereafter leading to fine conditions.
The rest of Monday May 3:
City:
Partly cloudy.
Chance of any rain:5%
Perth Metropolitan Area:
Partly cloudy.Smoke haze aloft.Winds easterly at 20-30 km/h.
Tuesday May 4:
City:
16-23 Degrees Celsius
Showers and thunderstorms.
Chance of any rain:95%
Amount:5 to 15 mm
Perth Metropolitan Area:
Partly to mostly cloudy.A very high (95%) chance of rain, showers and thunderstorms.Winds east-northeasterly at 20-30 km/h becoming northeasterly in the morning easing to 15-25 km/h in the afternoon.Gusty winds and heavy falls possible with thunderstorms.
Wednesday May 5:
City:
15-23 Degrees Celsius
Showers.Early thunderstorms.
Chance of any rain:95%
Amount:5 to 15 mm
Perth Metropolitan Area:
Partly to mostly cloudy.A very high (90%) chance of showers and thunderstorms early easing to a high (80%) chance of showers from morning.Heavy falls possible with thunderstorms early.Winds north-northeasterly at 15-25 km/h becoming northwesterly by morning shifting west-northwesterly by late morning becoming light later at night.
Thursday May 6:
City:
14-21 Degrees Celsius
Showers.
Chance of any rain:95%
Amount:5 to 15 mm
Perth Metropolitan Area:
Partly to mostly cloudy.A very high (95%) chance of showers.The chance of a thudnerstorm.Light winds.
Friday May 7:
City:
11-21 Degrees Celsius
Partly cloudy.
Chance of any rain:20%
Amount:Nil
Perth Metropolitan Area:
Partly cloudy.A slight(20%) chance of a shower most likely near the coast.Winds east-southeasterly at 10-20 km/h tending south-southwesterly in the afternoon.
Saturday May 8:
City:
9-22 Degrees Celsius
Partly cloudy.
Chance of any rain:10%
Amount:Nil
Perth Metropolitan Area:
Partly cloudy.Light winds tending southwesterly at 10-20 km/h in the afternoon.