Weather forecast for Perth effective as of 12:00 AM Wednesday May 23

Weather forecast for Perth effective as of 12:00 AM Wednesday May 23
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 yesterday).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).

Unusually warm until Thursday with warm air mass over the region.Temperatures up to 29 Degrees Celsius possible.

On Thursday night a strong cold front moves across the region ending the warm dry spell.

The cold front will likely be accompanied by thunderstorms.With very strong winds aloft,damaging winds are possible with thunderstorms,even the chance of tornadoes and waterspouts with high vertical wind shear.

On Friday deep cold air mass lies over the region with 500 hPa temps down to -24 Degrees Celsius,leading to the possibility of small hail and thunderstorms.

During the weekend some uncertainty with the possibility of further cold fronts but much weaker ones brushing the region or a high pressure ridge building just slightly south of the region.

Wednesday May 23:

City:

9-28 Degrees Celsius

Partly cloudy day.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy,high clouds clearing by night.Winds north-northeasterly at 15-25 km/h becoming light from afternoon.

Thursday May 24:

City:

11-28 Degrees Celsius

Late showers and thunderstorms,possibly heavy.

Chance of any rain:100%

Amount:10 to 35 mm.

Perth metropolitan area:

Partly cloudy,high clouds.A very high(100%) chance of showers and thunderstorms from evening.Heavy rainfall and damaging winds possible with thunderstorms.Winds north-northeasterly at 20-40 km/h becoming northwesterly from afternoon.

Friday May 25:

City:

13-18 Degrees Celsius

Showers.Possible thunderstorms.

Chance of any rain:100%

Amount:10 to 25 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(100%) chance of showers.The chance of thunderstorms and/or small hail.Winds west-southwesterly at 25-40 km/h.Gusts in excess of 70 km/h possible.

Saturday May 26:

City:

12-20 Degrees Celsius

Shower or two.

Chance of any rain:70%

Amount:0.2 to 1 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(70%) chance of showers.Winds west-southwesterly at 20-30 km/h.

Sunday May 27:

City:

13-21 Degrees Celsius

Showers.

Chance of any rain:80%

Amount:1 to 5 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(80%) chance of showers.Winds west-northwesterly at 15-25 km/h.

Monday May 28:

City:

12-21 Degrees Celsius

Shower or two.

Chance of any rain:60%

Amount:0 to 2 mm.

Perth metropolitan area:

Partly to mostly cloudy.A medium(60%) chance of showers.Winds west-southwesterly at 15-25 km/h.

Tuesday May 29:

City:

8-22 Degrees Celsius

Mostly sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny.Winds east-northeasterly at 10-20 km/h.

Forecast for today produced at 11:45 PM Monday May 7,forecast for the rest of the days produced at 5:00 PM Monday May 7.Weather icons courtesy of the US National Weather Service.