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

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

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 07:00 UTC(3 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).

As predicted strong gusty winds occurred on Saturday night and early on Sunday with wind gusts having reached 87 km/h at Gooseberry Hills!The strong gusty winds were due to a strong easterly pressure gradient with an unusually strong high pressure ridge to the south with maximum central mean sea level pressure(MSLP) having reached 1040 hPa combined with katabatic effects!

Some high clouds also occurred streaming in a subtropical jet stream.

Some middle level clouds from Monday to Thursday with moist air aloft.Virga will likely occur at times from Tuesday with the slight chance of reaching the ground on Wednesday.Some high clouds also streaming in a subtropical jet stream.

A west coast trough also deepens near the west coast leading to some warm air advection with hot conditions.

The west coast trough then moves inland on Wednesday afternoon with cooler air mass over the region thereafter.

A cold front likely moves over the region on Saturday bringing showers and possibly the coldest air mass over the region since spring last year.Then high pressure ridge rapidly builds to the south leading to clearing conditions.

Monday March 12:

City:

20-34 Degrees Celsius

Mostly sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny.Winds easterly at 20-35 km/h easing to 10-20 km/h in the afternoon becoming east-southeasterly at night.Wind gusts up to 65 km/h in the early hours and morning over the hills and foothills.

Tuesday March 13:

City:

23-35 Degrees Celsius

Partly cloudy.

Chance of any rain:5%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Winds east-northeasterly at 15-25 km/h tending southerly at 15-25 km/h from afternoon becoming southeasterly at 5-15 km/h at night.

Wednesday March 14:

City:

25-35 Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy,some high clouds.A slight(30%) chance of a shower from evening in the southwest,a slight(20%) chance elsewhere.Winds northeasterly at 15-25 km/h becoming westerly at 20-30 km/h from around the middle of the day becoming southwesterly at 10-20 km/h from afternoon becoming south-southwesterly at night.

Thursday March 15:

City:

20-26 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 0.4 mm.

Perth metropolitan area:

Partly cloudy,some high clouds.A slight(30%) chance of showers.Winds southwesterly at 20-30 km/h.

Friday March 16:

City:

15-24 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 0.2 mm.

Perth metropolitan area:

Partly cloudy,some high clodus.A slight(30%) chance of showers.Winds south-southwesterly at 15-25 km/h.

Saturday March 17:

City:

14-22 Degrees Celsius

Showers.

Chance of any rain:50%

Amount:0 to 1 mm.

Perth metropolitan area:

Partly cloudy.A medium(50%) chance of showers.Winds southwesterly at 30-40 km/h becoming southerly at 20-30 km/h at night.

Sunday March 18:

City:

10-25 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds south-southeasterly at 15-25 km/h.

Forecast for today produced at 11:00 PM,forecast for the rest of the days produced at 5:30 PM Sunday March 11.Weather icons courtesy of the US National Weather Service.