Weather forecast for Perth effective as of 6:00 PM Friday May 18

Weather forecast for Perth effective as of 6:00 PM Friday May 18
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 weather persists throughout the forecast period with a blocking subtropical high pressure ridge to the south with a blocking high in the Great Australian Bight throughout the forecast period.

The persistent high blocking high results in roughly the same temperatures everyday!

Also possible smoke haze at times depending on prescribed burns.

Late next working week a strong cold front likely moves across the region ending the warm dry spell.The cold front will likely be accompanied by strong gusty winds.

The rest  of Friday May 18:

City:

Clear.

Chance of any rain:0%

Perth metropolitan area:

Clear.Light winds.

Saturday May 19:

City:

9-25 Degrees Celsius

High clouds(mostly sunny).

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

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

Sunday May 20:

City:

8-25 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds northeasterly at 10-20 km/h becoming light from around the middle of the day.

Monday May 21:

City:

9-26 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

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

Tuesday May 22:

City:

10-26 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds northeasterly at 10-20 km/h becoming light from afternoon.

Wednesday May 23:

City:

11-27 Degrees Celsius

High clouds(mostly sunny).

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

High clouds(mostly sunny).Winds northeasterly at 10-20 km/h.

Thursday May 24:

City:

14-27 Degrees Celsius

PM showers

Chance of any rain:60%

Amount:0 to 6 mm.

Perth metropolitan area:

Partly cloudy.A medium(60%) chance of showers from afternoon.The chance of a thunderstorm at night.Winds north-northeasterly at 20-30 km/h becoming northwesterly from evening.

Friday May 25:

City:

15-21 Degrees Celsius

Showers.Possible thunderstorms.

Chance of any rain:90%

Amount:5 to 25 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(90%) chance of showers.The chance of thunderstorms.Winds west-northwesterly at 25-40 km/h becoming west-southwesterly from morning.Gusty winds possible.

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.