Current(Perth Metro)



Radar



Thursday, 4 October 2018

7 day weather forecast

Effective as of 12:00 AM Thursday October 4

Explanatory notes:


Strong easterly winds aloft means wind gusts in excess of 80 km/h possible over the hills and foothills during the early hours.

With an unstable atmosphere,thunderstorms likely develop over land from around the middle of the day ,thunderstorms will be steered to the southeast,hence highest chance of precipitation will be over the hills.Can't rule out hail with relatively cold air aloft,500 hPa temps of -17 Degrees Celsius.

The weak low passes just to the southwest on Friday bringing some showers.





Thursday October 4:
14-23 Degrees Celsius
Showers and thunderstorms developing
Chance of any rain:80%
Amount:1 to 6 mm.



Perth metropolitan area:
Mostly sunny morning.A slight(20%) chance of showers in the early hours.A very high(95%) chance of showers and thunderstorms over the hills in the afternoon,grading to a medium(60%) chance over coastal suburbs.A medium(50%) chance of showers thereafter.Winds easterly at 25-40 km/h becoming northeasterly at 20-30 km/h before dawn becoming northerly at 15-25 km/h from late morning becoming northwesterly at 20-30 km/h in the afternoon becoming light at night.Stronger winds and hail possible with thunderstorms.Wind gusts in excess of 80 km/h possible over the hills and foothills in the early hours.
Friday October 5:
13-22 Degrees Celsius
Showers.
Chance of any rain:80%
Amount:1 to 4 mm.



Perth metropolitan area:
Partly to mostly cloudy.A high(80%) chance of showers.The chance of a thunderstorm.Winds northwesterly at 10-20 km/h becoming light from evening.
Saturday October 6:
12-22 Degrees Celsius
Mostly cloudy.
Chance of any rain:20%
Amount:0 mm.



Perth metropolitan area:
Mostly cloudy.A slight(20%) chance of a shower.Winds southeasterly at 10-20 km/h tending south-southwesterly at 15-25 km/h during the afternoon.
Sunday October 7:
12-24 Degrees Celsius
Partly cloudy.
Chance of any rain:10%
Amount:0 mm.



Perth metropolitan area:
Partly cloudy.Winds easterly at 15-25 km/h becoming south-southwesterly at 20-30 km/h from afternoon.



Monday October 8:
12-23 Degrees Celsius
Partly cloudy.
Chance of any rain:20%
Amount:0 mm.



Perth metropolitan area:
Partly cloudy.A slight(30%) chance of a shower or thunderstorm over the hills in the afternoon,grading to a near zero chance near the coast.Light winds tending south-southwesterly at 15-25 km/h during the afternoon.



Tuesday October 9:
13-24 Degrees Celsius
Possible shower or thunderstorm.
Chance of any rain:30%
Amount:0 to 1 mm.



Perth metropolitan area:
Partly cloudy.A slight(30%) chance of a shower or thunderstorm.Winds easterly at 10-25 km/h.

Wednesday October 10:

13-24 Degrees Celsius
Partly cloudy.
Chance of any rain:20%
Amount:0 mm.



Perth metropolitan area:
Partly cloudy.A slight(20%) chance of a shower.Light winds.



Charts:


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 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).





Forecast for today produced at 12:00 AM,forecast for the rest of the days produced at 4:20 PM Wednesday July 11.Weather icons courtesy of the US National Weather Service.
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