Weather forecast for Perth effective as of 2:00 AM Saturday March 17

Weather forecast for Perth effective as of 2:00 AM Saturday March 17:

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).

Plenty of low level clouds were present on Friday morning with moist low level air.The low clouds cleared around the middle of the day with drier low level air.

Plenty of high clouds were present with tropical moisture from a tropical weather system in the Southern Indian Ocean streams aloft in a subtropical jet stream.

A cold front likely moves over the region today morning bringing a colder air mass,and the slight chance of light showers or drizzle.Plenty of low clouds in the morning capped by a subsidence inversion aloft.


Then high pressure ridge rapidly builds to the south leading to clearing conditions.


A west coast trough forms near the west coast next week leading to slight warm air advection.Some uncertainty on how hot it will be mid week with variation between models and ensemble members but it could be very hot.High level clouds also likely with tropical moisture from a tropical weather system in the Southern Indian Ocean streams aloft in a subtropical jet stream.

The west coast trough likely moves inland back by next Thursday.

Saturday March 17:

City:

16-24 Degrees Celsius

Possible AM drizzle.

Chance of any rain:30%

Amount:0 to 0.2 mm.

Perth metropolitan area:

Cloudy in the morning becoming clear by night.A slight(30%) chance of light showers or drizzle in the morning.Winds south-southwesterly at 5-15 km/h becoming south-southwesterly at 20-35 km/h during the day becoming south-southeasterly at 15-25 km/h at night.

Sunday March 18:

City:

12-27 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds east-southeasterly at 5-15 km/h becoming south-southwesterly at 20-30 km/h in the afternoon becoming south-southeasterly at 10-25 km/h at night.

Monday March 19:

City:

15-31 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds east-southeasterly at 15-25 km/h tending south-southeasterly at 10-20 km/h in the afternoon and evening.

Tuesday March 20:

City:

19-35 Degrees Celsius

High clouds(partly cloudy).

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

High clouds(partly cloudy).Winds easterly at 20-35 km/h easing to 15-25 km/h during the day increasing to 20-30 km/h later at night.

Wednesday March 21:

City:

23-36 Degrees Celsius

Partly cloudy.

Chance of any rain:5%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Winds east-northeasterly at 20-30 km/h becoming light from afternoon.

Thursday March 22:

City:

20-27 Degrees Celsius

Mostly sunny.

Chance of any rain:5%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny.Light winds becoming southwesterly at 20-30 km/h during the day becoming south-southwesterly at 15-25 km/h at night.

Friday March 23:

City:

16-28 Degrees Celsius

Mostly sunny.

Chance of any rain:5%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny.Winds south-southeasterly at 15-25 km/h tending south-southwesterly at 20-30 km/h during the afternoon and evening.

Forecast for today produced at 2:00 AM,forecast for the rest of the days  produced at 6:00 PM Friday March 16.Weather icons courtesy of the US National Weather Service.