Explanatory notes:
The west coast trough lied inland during Monday afternoon leading to an afternoon sea breeze just like on Sunday.The west coast trough moves offshore back overnight leading to an easterly flow overnight.
Possible showers and thunderstorms associated with the west coast trough ahead of an upper/middle level trough/disturbance on Tuesday and Wednesday.
Uncertainty on the precise pattern with different scenarios painted by the different models.GFS 00Z has thunderstorms throughout much of tomorrow while ECMWF 00Z has mainly dry conditions wit a low level jet triggering showers and thunderstorms early on Wednesday,but GFS 00Z has the low level wind convergence with the low level jet further to the east.
With 500 hPa temps down to -18 Degrees Celsius,relatively high instability,possible hail with thunderstorms.
Possible showers and thunderstorms associated with the west coast trough ahead of an upper/middle level trough/disturbance on Tuesday and Wednesday.
Uncertainty on the precise pattern with different scenarios painted by the different models.GFS 00Z has thunderstorms throughout much of tomorrow while ECMWF 00Z has mainly dry conditions wit a low level jet triggering showers and thunderstorms early on Wednesday,but GFS 00Z has the low level wind convergence with the low level jet further to the east.
With 500 hPa temps down to -18 Degrees Celsius,relatively high instability,possible hail with thunderstorms.
The rest of Monday October 8:
Mostly clear.
Chance of any rain:5%
Perth metropolitan area:
Mostly clear.Winds southeasterly at 10-20 km/h becoming east-southeasterly at 15-25 km/h at night.
Tuesday October 9:
15-27 Degrees Celsius
Possible showers and thunderstorms.
Chance of any rain:50%
Amount:0 to 8 mm.
Perth metropolitan area:
Partly cloudy.A medium(50%) chance of showers and thunderstorms.Possible hail with thunderstorms.Winds east-northeasterly at 15-25 km/h becoming light in the afternoon becoming easterly at 15-25 km/h at night.
Wednesday October 10:
15-27 Degrees Celsius
Possible AM showers and thunderstorms.
Chance of any rain:50%
Amount:0 to 3 mm.
Perth metropolitan area:
Partly cloudy.A medium(50%) chance of showers and thunderstorms in the early hours and morning clearing to a slight(20%) chance of a shower thereafter.Winds easterly at 15-25 km/h becoming light from afternoon.
Thursday October 11:
13-23 Degrees Celsius
Partly cloudy.
Chance of any rain:20%
Amount:0 mm.
Perth metropolitan area:
Partly cloudy.A slight(30%) chance of a shower over the hills,a slight(20%) chance elsewhere.Light winds tending west-southwesterly at 10-20 km/h from afternoon.
Friday October 12:
14-21 Degrees Celsius
Possible shower or two.
Chance of any rain:40%
Amount:0 to 2 mm.
Perth metropolitan area:
Partly to mostly cloudy.A medium(40%) chance of showers.Winds west-southwesterly at 10-20 km/h becoming light at night.
Saturday October 13:
12-20 Degrees Celsius
Showers.Possible thunderstorm.
Chance of any rain:95%
Amount:5 to 15 mm.
Perth metropolitan area:
Partly to mostly cloudy.A very high(95%) chance of showers.The chance of a thunderstorm.Light winds becoming southwesterly at 15-25 km/h from afternoon.
Sunday October 14:
12-21 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 tending west-southwesterly at 10-20 km/h during the day.
Monday October 15:
10-24 Degrees Celsius
Mostly sunny.
Chance of any rain:5%
Amount:0 mm.
Perth metropolitan area:
Mostly sunny.Light winds.
Charts:
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.
