Effective as of 4:00 AM Saturday May 1 2021
Explanatory notes:
Fine conditions until Monday night with the subtropical high pressure ridge to the south but cold morning today and and Sunday with radiational cooling of the cold air mass with light winds and mostly clear skies.
Light easterlies during the early hours and morning during the weekend followed by afternoon sea breezes.
On Monday, easterly gradient flow strengthens with a west coast trough deepening near the west coast, likely suppressing the sea breeze.
Some showers and thunderstorms are expected on Tuesday associated with an upper level low and associated developing surface low. Some uncertainty on the details this far out in time, once the upper level low and associated cold pool moves to the east, thunderstorm chances diminishes but further showers are likely to continue in the moist onshore flow through the end of the forecast period with a cold frontal passage also possible on Thursday.
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Saturday May 1:
City:
8-22 Degrees Celsius
Mostly sunny.
Chance of any rain:0%
Amount:Nil
Perth Metropolitan Area:
Partly cloudy.Light winds tending east-northeasterly at 10-20 km/h in the morning, south-southwesterly at 10-20 km/h in the afternoon becoming southeasterly at night.
Sunday May 2:
City:
8-23 Degrees Celsius
Mostly sunny.
Chance of any rain:5%
Amount:Nil
Perth Metropolitan Area:
Mostly sunny.Light winds tending south-southwesterly at 15-25 km/h in the afternoon becoming southeasterly at night.
Monday May 3:
City:
11-24 Degrees Celsius
Partly cloudy.
Chance of any rain:10%
Amount:Nil
Perth Metropolitan Area:
Partly cloudy.Winds east-southeasterly at 20-30 km/h.
Tuesday May 4:
City:
14-23 Degrees Celsius
Showers and thunderstorms.
Chance of any rain:70%
Amount:2 to 10 mm
Perth Metropolitan Area:
Partly to mostly cloudy.A high(70%) chance of showers and thunderstorms.Winds northeasterly at 15-25 km/h.
Wednesday May 5:
City:
13-22 Degrees Celsius
Showers.
Chance of any rain:70%
Amount:2 to 8 mm
Perth Metropolitan Area:
Partly to mostly cloudy.A high(70%) chance of showers.The chance of a thunderstorm.Winds northerly at 15-30 km/h becoming northwesterly during the day.
Thursday May 6:
City:
13-21 Degrees Celsius
Showers.
Chance of any rain:70%
Amount:2 to 8 mm
Perth Metropolitan Area:
Partly to mostly cloudy.A high(70%) chance of showers.Winds west-southwesterly at 15-25 km/h.
Friday May 7:
City:
12-21 Degrees Celsius
Shower or two.
Chance of any rain:50%
Amount:0 to 3 mm
Perth Metropolitan Area:
Partly to mostly cloudy.A medium(50%) chance of showers.Winds southwesterly at 15-30 km/h.
Charts:
Figure 1.Surface synoptic chart.Image courtesy of the Australian Bureau of Meteorology(BOM).
2.
Figure 2.Key features identified on True Colour RGB satellite image.Satellite image courtesy of the Japanese Meteorological Agency(JMA).
Figure 4:Surface synoptic prognosis.Image courtesy of the Australian Bureau of Meteorology(BOM).
No liabilities held from information consumed on this site. Weather icons are from the US National Weather Service.Some information on this site is from the Australian Bureau of Meteorology (BOM).
