Weather forecast for Perth effective as of 12:00 AM Monday April 30

Weather forecast for Perth effective as of 12:00 AM Monday April 30:

Explanatory notes:
Scroll down below this section for forecast. 

Figure 1.Surface synoptic chart at 12 UTC(8 PM local time yesterday).Image courtesy of the Australian Bureau of Meteorology(BOM).

Figure 2.Key features identified on True Colour RGB satellite image at around 06:00 UTC(2 PM local time today).Satellite image courtesy of the Japanese Meteorological Agency(JMA).

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).

Figure 4:Surface synoptic prognosis.Image courtesy of the Australian Bureau of Meteorology(BOM).

It was a hot Sunday with warm air mass over the region with the west coast trough offshore.Maximum temperatures reached 31.0 Degrees Celsius at the Perth Metro station,31.8 Degrees Celsius at Perth Airport and Pearce.

Despite that intense radiational cooling has cooled temperatures to below 14 Degrees Celsius!

The west coast trough moves inland around the middle of the day today resulting in an afternoon sea breeze with lower temps.Maximum temperature will likely occur around the middle of the day or early afternoon.

The slight chance of showers most likely over coastal suburbs tonight and on Tuesday.Much cooler air mass moves over the region bringing typical late autumn weather with 850 hPa temperatures dropping by more than 10 Degrees Celsius.

A weak cold front possibly brushes the region on Wednesday.

Likely radiational cooling of already cool air results in chilly morning on Thursday and Friday.

Monday April 30:

City:

14-29 Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.A slight(30%) chance of a shower over coastal suburbs night,grading to a near zero chance inland.Winds northeasterly at 20-30 km/h becoming northerly from mid morning becoming westerly at 20-30 km/h from early afternoon becoming south-southwesterly from late afternoon.

Tuesday May 1:

City:

13-21 Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:0  mm.

Perth metropolitan area:

Partly cloudy.A slight(20%) chance of showers most likely near the coast.Winds south-southwesterly at 15-25 km/h.

Wednesday May 2:

City:

11-20 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 south-southwesterly at 20-30 km/h.

Thursday May 3:

City:

8-21 Degrees Celsius

Partly cloudy.

Chance of any rain:10%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Light winds.

Friday May 4:

City:

9-23 Degrees Celsius

High clouds(mostly sunny).

Chance of any rain:5%

Amount:0 mm.

Perth metropolitan area:

High clouds(mostly sunny).Winds east-northeasterly at 10-20 km/h becoming light from afternoon becoming southeasterly at 10-20 km/h from late afternoon.

Saturday May 5:

City:

11-25 Degrees Celsius

Partly cloudy.

Chance of any rain:10%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Winds east-northeasterly at 10-20 km/h becoming light from afternoon.

Sunday May 6:

City:

12-25 Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.A slight(20%) chance of a shower.Winds west-northwesterly at 10-25 km/h.

Forecast produced at 6:00 PM Sunday April 29.Weather icons courtesy of the US National Weather Service.