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Weather forecast for Perth effective as of 8:30 AM Tuesday January 23:

Explanatory notes:
Scroll down below this section for forecast. 


Figure 1.Surface synoptic chart at  18 UTC(2 AM local time today).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 today).Satellite image courtesy of the Japanese Meteorological Agency(JMA).

Figure 3.Mean Sea Level Pressure(MSLP) analysis with infrared greyscale satellite image at 18 UTC(2 AM local time today).Image courtesy of the Australian Bureau of Meteorology(BOM).



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


Some middle level clouds(altocumulus castellanus) this morning associated with low level wind convergence at around the 850 hPa level to the north with some instability aloft.

Hot and humid weather occurred for the past few days with the hot air mass over the region with a west coast trough near the west coast.

Despite maximum temperatures appearing not so hot,the humidity made it feel hotter than usually at those temperatures.

The elevated humidity was due to evaporation from moist soils moistened by the significant rainfall earlier during the week.

Cooler weather from mid week as the west coast trough moves further inland.

Mostly sunny with comfortable temperatures for Australia Day with the usual afternoon and evening sea breeze.

From late during the weekend some uncertainty on the precise synoptic condition but likely strengthening somewhat easterly winds.













The precis(summary) forecasts and "chance of any rain forecasts" are for Perth City while the detailed description underneath the precis forecasts is for the forecast area of Perth but the chance of rain forecasts in the detailed description underneath the precis forecasts is the average for the forecast area 
unless otherwise stated.

Time of day:
Cooler months(May 1-September 30):
Early hours:12AM-7AM 
Morning:before 12PM
Middle of the day:11AM to 1PM
Afternoon:1PM to 5PM
Evening:5PM to 7PM
Night:After 6:30 PM.


About forecasts.

The forecast:



The rest of Tuesday January 23:
City:
Maximum:32 Degrees Celsius
Becoming sunny.
Chance of any rain:5%
Rainfall amount:0 mm.



Perth metropolitan area:
Sunny except for some middle level cloud in the morning and some high clouds late at night(mostly clear).The very slight chance of showers and thunderstorms over the hills in the afternoon and evening.Winds east-southeasterly at 15-25 km/h,becoming south-southwesterly at 20-30 km/h from afternoon becoming south to southeasterly at 15-25 km/h at night.



Wednesday January 24:
City:
20-32 Degrees Celsius
Sunny.
Chance of any rain:0%
Rainfall amount:0 mm.



Perth metropolitan area:
Sunny.The very slight chance of showers and thunderstorms east of the hills in the afternoon and evening.Winds east-southeasterly at 10-20 km/h,becoming southwesterly at 20-35 km/h from afternoon easing to 15-25 km/h at night.


Thursday January 25:
City:
19-29 Degrees Celsius
Sunny.
Chance of any rain:0%
Rainfall amount:0 mm.



Perth metropolitan area:
Sunny.Winds south-southeasterly at 10-20 km/h becoming southwesterly at 20-35 km/h from afternoon becoming south-southwesterly at 15-30 km/h at night.


Friday January 26:
City:
16-28 Degrees Celsius
Mostly sunny.
Chance of any rain:0%
Rainfall amount:0 mm.



Perth metropolitan area:
Mostly sunny.Winds southerly at 10-20 km/h becoming southwesterly at 20-30 km/h from afternoon becoming south-southwesterly at 10-25 km/h at night,becoming light later at night.


Saturday January 27:
City:
17-28 Degrees Celsius
Mostly sunny.
Chance of any rain:0%
Rainfall amount:0 mm.



Perth metropolitan area:
Mostly sunny.Winds southerly at 10-20 km/h,becoming southwesterly at 20-30 km/h from afternoon becoming south-southeasterly at 15-25 km/h at night.






















































































































Sunday January 28:
City:
16-30 Degrees Celsius
Mostly sunny.
Chance of any rain:0%
Rainfall amount:0 mm.



Perth metropolitan area:
Mostly sunny.Winds southeasterly at 15-30 km/h.







































Monday January 29:
City:
16-30 Degrees Celsius
Sunny.
Chance of any rain:0%
Rainfall amount:0 mm.



Perth metropolitan area:
Sunny.Winds east-southeasterly at 20-35 km/h.



Weather forecast for today produced at 8:30 AM,forecast for the rest of the days produced at 5:20 PM Monday January 22.Some of the weather icons courtesy of the US National Weather Service.

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