7 day weather forecast

 Effective as of 4:00 PM Tuesday May 11 2021

Explanatory notes:

WIt was a very warm afternoon today with the warm air mass over the region with the high in the Great Australian Bight.

High and middle level clouds ahead of an upper level trough.

The slight chance of fog in the early hours with radiational cooling of moist low level air but cloud moving in from the south acts as a limiting factor.

A cold front moves over the region from the south early tomorrow bringing showers. 

The strong high pressure ridge builds to the south thereafter leading to significant east-southeasterly flow becoming more east-northeasterly then northeasterly from the weekend as the high pressure system moves into the Great Australian Bight. During this period, upper and middle level moisture ahead of a cut off low in the indian Ocean leads to high and middle level clouds over the region.

The rest of Tuesday May 11:

City:

Partly cloudy.

Chance of any rain:0%

Perth Metropolitan Area:

Partly cloudy.High clouds.Winds northwesterly at 10-20 km/h becoming light from evening.

Wednesday May 12:

City:

13-23  Degrees Celsius

Shower or two.

Chance of any rain:50%

Amount:0 to 2 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A high(70%) chance of showers in the southwest grading to a slight(30%) chance in the northeast, most likely in the morning.Light winds becoming southeasterly at 15-25 km/h in the morning becoming east-southeasterly at 20-30 km/h in the afternoon.

Thursday May 13:

City:

9-21  Degrees Celsius

Partly cloudy.

Chance of any rain:0%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.Winds east-southeasterly at 20-30 km/h easing to 15-25 km/h in the afternoon.

Friday May 14:

City:

11-23  Degrees Celsius

Partly to mostly cloudy.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

Partly to mostly cloudy.Winds east-northeasterly at 20-30 km/h.

Saturday May 15:

City:

13-23  Degrees Celsius

Mostly cloudy.

Chance of any rain:10%

Amount:Nil

Perth Metropolitan Area:

Mostly cloudy.Winds east-northeasterly at 20-30 km/h.

Sunday May 16:

City:

14-24  Degrees Celsius

Mostly cloudy.

Chance of any rain:20%

Amount:Nil

Perth Metropolitan Area:

Mostly cloudy.A slight(20%) chance of a shower.Winds northeasterly at 15-25 km/h.

Monday May 17:

City:

15-25  Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 1 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A slight(30%) chance of showers..Winds northeasterly at 15-25 km/h.

Tuesday May 18:

City:

15-25  Degrees Celsius

Shower or two.

Chance of any rain:50%

Amount:0 to 2 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A medium(50%) chance of a shower.Winds northwesterly at 10-20 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 3.Mean Sea Level Pressure(MSLP) analysis with infrared greyscale satellite image. Image courtesy of the Australian Bureau of Meteorology(BOM)

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).