Motorists should be prepared for a storm and possible hail on their way home this afternoon with a cold front expected to sweep Perth just in time for the rush of rush hour commuters.
Bureau of Meteorology service forecaster Bob Tarr said severe weather would strike between 4 p.m. and 6 p.m. before clearing later in the evening.
“Behind the front there will be wind and just cold, windy showers that will last until around noon tomorrow,” he said.
“The first risk of severe weather events is along the front, then behind the gusty showers that could bring isolated destructive winds. It will be quite cold and there will also be the risk of hail. ”
Severe weather warning has been issued for the cold front which is already bringing destructive winds, including gusts up to 100 km / h, and cold and stormy conditions across much of southwestern state of Washington.
Communities from Jurien Bay to Israelite Bay, including Perth, are expected to feel the force of the storm.
Mr Tarr said the Perth Hills were likely to take the brunt of the storm with up to 35mm of possible precipitation.
Once the cold front has passed, temperatures are expected to drop to just 15 ° C in Perth, 12 ° C in Dowerin and 10 ° C in Manjimup.
Cold conditions could also produce a blanket of snow on the Stirling Ranges on Tuesday.
The storm will be the worst winter condition of the week, but gloomy conditions are expected to continue.
“More downpours will occur for the rest of the week, but there is no real weather causing them, just offshore winds and there is humidity around,” Mr. Tarr said. “So there will be a few showers, but long dry spells as well. ”
Average precipitation for August is 124mm, with 20mm already reaching the Perth rain gauge.
It comes after the wettest July in 26 years in which the precipitation count fell to just 7.2mm from the all-time high of 278mm.
On Monday: 18C – Showers, becoming windy. Late storm. Possible precipitation from 6 to 15 mm.
Tuesday: 9-15C – Showers. Storm possible, 8-15mm.
Wednesday: 8-18C – Showers, 1-2mm.
Thusday: 9-18C – Showers, 1-2mm.
Friday: 8-20C – Partly cloudy, 0-0.2 mm.
On Saturday: 10-19C – Shower or two, 0-6mm.
Sunday: 9-19C – Partly cloudy, 0-0.4 mm