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).
Forecast updated to reflect high cloud cover associated with marine layer clouds.The ACCESS model best predicts this cloud cover.
.
Wednesday was second hottest day of the year.A sea breeze had developed.It was hotter than any day of summer.A day hotter than the hottest day of summer after the Autumn Equinox has not happened in more than 100 years(last occurred in 1914).It has never happened at the Mount Lawley site.
The west coast trough moves inland today with the marine layer advecting inland.Some marine layer clouds expected.
A more easterly pressure gradient redevelops from Friday as a ridge of high pressure builds to the south with Tropical Cyclone Marcus to the northwest.
A rain band extending from Tropical Cyclone Marcus possibly affects the region on Saturday with the remnants of Tropical Cyclone Marcus likely to move over the region on Monday bringing rain and showers.There is no need to be alarmed as the cyclone would be quite weak then as it rapidly weakens during the weekend upon encountering cool sea surface temperatures and vertical wind shear associated with the subtropical jet stream.
Cooler air mass then lies over the region with sunny conditions by Wednesday with a ridge of high pressure building to the south.
Wednesday was second hottest day of the year.A sea breeze had developed.It was hotter than any day of summer.A day hotter than the hottest day of summer after the Autumn Equinox has not happened in more than 100 years(last occurred in 1914).It has never happened at the Mount Lawley site.
The west coast trough moves inland today with the marine layer advecting inland.Some marine layer clouds expected.
A more easterly pressure gradient redevelops from Friday as a ridge of high pressure builds to the south with Tropical Cyclone Marcus to the northwest.
A rain band extending from Tropical Cyclone Marcus possibly affects the region on Saturday with the remnants of Tropical Cyclone Marcus likely to move over the region on Monday bringing rain and showers.There is no need to be alarmed as the cyclone would be quite weak then as it rapidly weakens during the weekend upon encountering cool sea surface temperatures and vertical wind shear associated with the subtropical jet stream.
Cooler air mass then lies over the region with sunny conditions by Wednesday with a ridge of high pressure building to the south.
Thursday March 22:
City:
Maximum:27 Degrees Celsius
Clouds,decreasing later.
Chance of any rain:5%
Amount:0 mm.
Perth metropolitan area:
Cloudy becoming mostly clear at night.The slight chance of drizzle until afternoon.Winds southwesterly at 15-25 km/h becoming south-southwesterly at 10-20 km/h at night.
Friday March 23:
Perth metropolitan area:
Friday March 23:
City:
17-30 Degrees Celsius
Partly cloudy.
Chance of any rain:0%
Amount:0 mm.
Perth metropolitan area:
Partly cloudy.Winds south-southeasterly at 10-20 km/h becoming south-southwesterly at 20-30 km/h from afternoon becoming southeasterly at 10-20 km/h at night.
Saturday March 24:
Perth metropolitan area:
Saturday March 24:
City:
18-28 Degrees Celsius
Possible light rain at times.
Chance of any rain:30%
Amount:0 to 1 mm.
Perth metropolitan area:
Mostly cloudy,high clouds.A slight(30%) chance of light rain rain.Winds east-southeasterly at 15-25 km/h.
Sunday March 25:
Perth metropolitan area:
Sunday March 25:
City:
17-29 Degrees Celsius
Partly to mostly cloudy.
Chance of any rain:10%
Amount:0 mm.
Perth metropolitan area:
Partly to mostly cloudy.Winds easterly at 20-30 km/h.
Monday March 26:
Perth metropolitan area:
Monday March 26:
City:
20-26 Degrees Celsius
Rain.
Chance of any rain:70%
Amount:2 to 6 mm.
Perth metropolitan area:
Cloudy.A high(70%) chance of rain and showers.Winds northeasterly at 15-30 km/h shifting westerly during the day becoming south-southwesterly at 15-25 km/h at night.
Tuesday March 27:
Perth metropolitan area:
Tuesday March 27:
City:
16-23 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.Winds south-southwesterly at 15-30 km/h.
Wednesday March 28:
Perth metropolitan area:
Wednesday March 28:
City:
12-25 Degrees Celsius
Sunny.
Chance of any rain:0%
Amount:0 mm.
Perth metropolitan area:
Sunny.Winds east-southeasterly at 10-20 km/h tending south-southwesterly at 15-30 km/h in the afternoon and evening.
Forecast for today produced at 10:30 AM,forecast for the rest of the days produced at 5:00 PM Wednesday March 21.Weather icons courtesy of the US National Weather Service.
