Weather forecast for Perth effective as of 6:30 PM Thursday June 28

Weather forecast for Perth effective as of 6:30 PM Thursday June 28
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).

Cold air mass lies over the region,possible frost over the hills early on Friday with excellent radiational cooling.Warm air advection during the weekend resulting in warm air mass over the region on Sunday,Monday.

A cold front ahead of an upper level trough moves towards the region on Monday bringing a rainband.Strong low to the south results in strong gusty winds on Tuesday,also vigorous westerly flow possible on Wednesday and Thursday altogether bringing a wet working week,possible cold frontal passage on Thursday.

The rest of Thursday June 28:

City:

Clear.

Chance of any rain:0%

Perth metropolitan area:

Clear.Light winds.

Friday June 29:

City:

4-17 Degrees Celsius

Partly cloudy.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Patches of frost possible in the hills.Winds easterly at 10-20 km/h becoming light from afternoon.

Saturday June 30:

City:

4-19 Degrees Celsius

Mostly sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny.Winds north-northeasterly at 10-25 km/h becoming northerly in the afternoon becoming light from late afternoon.

Sunday July 1:

City:

6-21 Degrees Celsius

Partly to mostly cloudy.

Chance of any rain:10%

Amount:0 mm.

Perth metropolitan area:

Partly to mostly cloudy.A slight(20%) chance of a shower in the southwest at night.Winds north-northeasterly at 15-25 km/h becoming north-northwesterly from around the middle of the day.

Monday July 2:

City:

14-20 Degrees Celsius

Windy with rain,showers,possible heavy.

Chance of any rain:100%

Amount:20 to 40 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(100%) chance of rain and showers.The chance of a thunderstorm.Heavy falls possible.Winds northwesterly at 20-30 km/h strengthening to 30-50 km/h at night.Gusty winds likely at night.

Tuesday July 3:

City:

13-20 Degrees Celsius

Windy with showers.

Chance of any rain:90%

Amount:4 to 15 mm.

Perth metropolitan area:

Partly to mostly cloudy.A very high(90%) chance of showers(rain early).The chance of a thunderstorm.Winds northwesterly at 30-50 km/h becoming west-southwesterly at 20-30 km/h at night.Gusty winds likely.

Wednesday July 4:

City:

10-18 Degrees Celsius

Showers.

Chance of any rain:80%

Amount:2 to 8 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(80%) chance of showers.Winds westerly at 25-40 km/h.Gusty winds possible.

Thursday July 5:

City:

8-17 Degrees Celsius

Showers.

Chance of any rain:80%

Amount:1 to 7 mm.

Perth metropolitan area:

Partly to mostly cloudy.A high(80%) chance of showers.Winds west-southwesterly at 25-40 km/h.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.