Explanatory notes:
Scroll down below this section for forecast.
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).
A more southeasterly pressure gradient occurred on Wednesday but there were plenty of clouds with plenty of low level moisture.
Some low clouds possible overnight and in the morning as predicted by the ACCESS model but not by other models with satellite images showing some low clouds extending to the Darling Scarp,struggling to reach the coastal plains due to downslope flow off the scarp.Some shallow low to middle level convective clouds also possible during the afternoon again predicted by the ACCESS model but not by other models.
Sea breezes likely return with strong solar heating of land.Warmer temperatures with the west cast trough near the west coast.
Cooler maximum temperatures on Friday with a relatively strong sea breeze with the west coast trough inland and the southerly pressure gradient "bending" with solar heating.
Warmer maximum temperatures from the weekend again with the west coast trough near the west coast,west coast trough moving inland from Sunday and hence cooler maximum temperature with early sea breezes on Monday and Tuesday.
Some uncertainty on the precise synoptic conditions mid week next week.
The long spell with no 40+ Degree Days continues with the last 40+ Degree Day being Australia Day last year!With no 40+ Degree day within the forecast period,the next 40+ Degree Day will be at least the latest during summer as the 2005-2006 summer.
Some low clouds possible overnight and in the morning as predicted by the ACCESS model but not by other models with satellite images showing some low clouds extending to the Darling Scarp,struggling to reach the coastal plains due to downslope flow off the scarp.Some shallow low to middle level convective clouds also possible during the afternoon again predicted by the ACCESS model but not by other models.
Sea breezes likely return with strong solar heating of land.Warmer temperatures with the west cast trough near the west coast.
Cooler maximum temperatures on Friday with a relatively strong sea breeze with the west coast trough inland and the southerly pressure gradient "bending" with solar heating.
Warmer maximum temperatures from the weekend again with the west coast trough near the west coast,west coast trough moving inland from Sunday and hence cooler maximum temperature with early sea breezes on Monday and Tuesday.
Some uncertainty on the precise synoptic conditions mid week next week.
The long spell with no 40+ Degree Days continues with the last 40+ Degree Day being Australia Day last year!With no 40+ Degree day within the forecast period,the next 40+ Degree Day will be at least the latest during summer as the 2005-2006 summer.
Thursday February 8:
City:
16-33 Degrees Celsius
Mostly sunny.
Chance of any rain:0%
Rainfall amount:0 mm.
Perth metropolitan area:
Mostly sunny.Winds east-southeasterly at 15-25 km/h becoming south-southwesterly at 20-30 km/h from afternoon easing to 10-20 km/h at night.
Perth metropolitan area:
Friday February 9:
City:
19-28 Degrees Celsius
Becoming sunny.
Chance of any rain:10%
Rainfall amount:0 mm.
Perth metropolitan area:
Mostly sunny becoming sunny by late morning.Light winds becoming southwesterly at 25-40 km/h by afternoon easing to 15-25 km/h at night.
Perth metropolitan area:
Saturday February 10:
City:
16-31 Degrees Celsius
Sunny.
Chance of any rain:0%
Rainfall amount:0 mm.
Perth metropolitan area:
Sunny.Winds south-southeasterly at 15-25 km/h becoming south-southwesterly at 20-30 km/h from afternoon becoming south to southeasterly at 10-20 km/h at night.
Perth metropolitan area:
Sunday February 11:
City:
18-33 Degrees Celsius
Sunny.
Chance of any rain:0%
Rainfall amount:0 mm.
Perth metropolitan area:
Sunny.Winds east-southeasterly at 15-25 km/h becoming south-southwesterly at 20-35 km/h from afternoon becoming south- southeasterly at 10-20 km/h at night.
Perth metropolitan area:
Monday February 12:
City:
19-31 Degrees Celsius
Becoming sunny.
Chance of any rain:0%
Rainfall amount:0 mm.
Perth metropolitan area:
Mostly sunny becoming sunny by late morning.Light winds becoming southwesterly at 20-35 km/h from afternoon easing to 15-25 km/h at night.
Perth metropolitan area:
Tuesday February 13:
City:
17-28 Degrees Celsius
Partly cloudy.
Chance of any rain:5%
Rainfall amount:0 mm.
Perth metropolitan area:
Partly cloudy.Winds southerly at 15-25 km/h tending southwesterly at 20-30 km/h between around the middle of the day and evening.
Perth metropolitan area:
Wednesday February 14:
City:
17-31 Degrees Celsius
Sunny.
Chance of any rain:0%
Rainfall amount:0 mm.
Perth metropolitan area:
Sunny.Winds southerly at 15-25 km/h tending southwesterly at 20-30 km/h between around the middle of the day and evening.
