7 day weather forecast

Effective as of 12:00 AM Thursday July 30

Explanatory notes:




Cold morning on Thursday with light winds and clear skies.Also the slight possibility of shallow fog/mist given radiational cooling of moist low level air from Wednesday evening but some drier air from the east limits this possibility.

On Friday, the passage of a decaying cold front brings the possibility of showers.

A rare southerly "backdoor" cold front is likely to move over the region on Sunday bringing a very cold but dry air mass from the southeast to lie over the region next Monday and Tuesday.Sunny morning but clouds develop with solar heating with steep vertical lapse rate but the stratocumulus should be capped by a low subsidence inversion keeping conditions dry.

Thursday July 30:

City:

7-20 Degrees Celsius

PM clouds.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

A sunny morning becoming partly cloudy from afternoon.Shallow fog/mist possible early.Light winds becoming southwesterly at 10-20 km/h from afternoon.

Friday July 31:

City:

10-19 Degrees Celsius

Shower or two.

Chance of any rain:50%

Amount:0 to 1 mm

Perth Metropolitan Area:

Partly cloudy.A medium(50%) chance of showers. Light winds tending south-southwesterly at 15-25 km/h during the day.

Saturday August 1:

City:

7-19 Degrees Celsius

Partly cloudy.

Chance of any rain:0%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.Light winds tending east-southeasterly at 10-20 km/h in the morning.

Sunday August 1:

City:

7-19 Degrees Celsius

Partly cloudy.

Chance of any rain:10%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy..Light winds becoming southerly at 15-25 km/h in the afternoon becoming southeasterly from evening.

Monday August 2:

City:

4-15 Degrees Celsius

Clouds developing.

Chance of any rain:10%

Amount:Nil

Perth Metropolitan Area:

A sunny morning with clouds developing to become partly cloudy in the afternoon.Winds southeasterly at 15-25 km/h.

Tuesday August 3:

City:

4-16 Degrees Celsius

Clouds developing.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

A sunny morning with clouds developing to become partly cloudy in the afternoon.Winds southeasterly at 15-25 km/h.

Wednesday August 4:

City:

6-18 Degrees Celsius

Mostly sunny.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

Mostly sunny.Winds southeasterly at 10-20 km/h.

Charts:

Figure 1.Surface synoptic chart at 00 UTC(8 AM local time today).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 today).Satellite image courtesy of the Japanese Meteorological Agency(JMA).

Figure 3.Mean Sea Level Pressure(MSLP) analysis with infrared greyscale satellite image at 00 UTC(8 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 data on this site is sourced from the Australian Bureau of Meteorology(BOM).