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).
Marine layer clouds were present on Thursday,with higher cloud cover than expected.The ACCESS model best predicted the cloud cover.
The marine layer remains over the region today but there will be much less marine layer clouds.
High clouds and also some middle level clouds from afternoon today associated with moist air aloft aloft from Severe Tropical Cyclone Marcus.
A more easterly pressure gradient redevelops also develops as a ridge of high pressure builds to the south with Tropical Cyclone Marcus to the northwest.
A light 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.
Friday March 23:
City:
17-30 Degrees Celsius
Clouds increasing later.
Chance of any rain:0%
Amount:0 mm.
Perth metropolitan area:
Mostly sunny becoming partly cloudy from late afternoon.Winds south-southeasterly at 10-20 km/h becoming south-southwesterly at 15-25 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 0.4 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:
18-30 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 tending 15-25 km/h in the afternoon and evening.
Monday March 26:
Perth metropolitan area:
Monday March 26:
City:
21-27 Degrees Celsius
Rain.
Chance of any rain:80%
Amount:2 to 6 mm.
Perth metropolitan area:
Cloudy.A very high(90%) chance of rain and showers in the southwest grading to a high(70%) chance in the northeast.Winds northeasterly at 10-25 km/h becoming north-northwesterly before dawn becoming westerly at 25-40 km/h then southwesterly becoming south-southwesterly at 20-30 km/h at night.
Tuesday March 27:
Perth metropolitan area:
Tuesday March 27:
City:
16-23 Degrees Celsius
Possible early shower.
Chance of any rain:30%
Amount:0 to 1 mm.
Perth metropolitan area:
A slight(30%) chance of showers in the early hours and morning then sunny.Winds south-southeasterly at 15-25 km/h tending south-southwesterly at 20-30 km/h in the afternoon and evening.
Wednesday March 28:
Perth metropolitan area:
Wednesday March 28:
City:
13-25 Degrees Celsius
Sunny.
Chance of any rain:0%
Amount:0 mm.
Perth metropolitan area:
Sunny.Winds east-southeasterly at 10-20 km/h becoming south-southwesterly at 20-30 km/h from afternoon becoming south-southeasterly at 10-20 km/h at night.
Thursday March 29:
Perth metropolitan area:
Thursday March 29:
City:
14-27 Degrees Celsius
Sunny.
Chance of any rain:0%
Amount:0 mm.
Perth metropolitan area:
Sunny.Winds southeasterly at 10-20 km/h tending south-southwesterly at 20-30 km/h in the afternoon and evening.
Forecast for today produced at 12:00 AM,forecast for the rest of the days produced at 4:20 PM Thursday March 22.Weather icons courtesy of the US National Weather Service.
