Weather forecast for Perth effective as of 12:00 AM Saturday June 16

Weather forecast for Perth effective as of 12:00 AM Saturday June 16
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 3.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 4.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 5:Surface synoptic prognosis.Image courtesy of the Australian Bureau of Meteorology(BOM).

High pressure system to the east results in dry conditions until late on Sunday with showers possible ahead of a cold front.Some warm air advection results in increasing maximum temperatures.

Patches of fog formed early on Friday with radiational cooling of moist low level air.Stratocumulus clouds developed in the afternoon with convection.

A cold front moves across the region near midnight on Sunday/early on Monday with deep cold air mass over the region for the rest of Monday.

Saturday June 16:

City:

7-21 Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Sunny.Winds east-northeasterly at 15-25 km/h becoming northeasterly from late morning becoming light from late afternoon becoming northeasterly at 10-20 km/h later at night.

Sunday June 17:

City:

9-23 Degrees Celsius

Night shower or two.

Chance of any rain:50%

Amount:0 to 2 mm.

Perth metropolitan area:

Sunny morning and afternoon.A high(70%) chance of showers near the coast at night,grading to a slight(30%) chance in the northeast.The chance of a thunderstorm in the southwest near midnight.Winds north-northeasterly at 20-30 km/h becoming northerly from afternoon easing to 10-25 km/h from late afternoon.

Monday June 18:

City:

10-17 Degrees Celsius

Showers.Possible thunderstorm.

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 a thunderstorm.Possible gusty winds early.Winds northwesterly at 20-30 km/h becoming west-southwesterly at 20-35 km/h before dawn.

Tuesday June 19:

City:

9-18 Degrees Celsius

Showers.

Chance of any rain:90%

Amount:2 to 8 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(90%) chance of showers.Winds west-southwesterly at 15-25 km/h becoming light at night.

Wednesday June 20:

City:

9-19 Degrees Celsius

Showers.

Chance of any rain:70%

Amount:0.4 to 4 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(70%) chance of showers.Winds west-southwesterly at 15-25 km/h.

Thursday June 21:

City:

9-19 Degrees Celsius

Showers.

Chance of any rain:80%

Amount:0.4 to 5 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(80%) chance of showers.Winds westerly at 10-20 km/h.

Friday June 22:

City:

8-19 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 1 mm.

Perth metropolitan area:

Partly cloudy.A slight(30%) chance of showers.Light winds.

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.