Fairfax Media Network

Weather News

Strange weather caused by combination of factors

Thursday December 13, 2012 - 15:08 EDT

The Weather Bureau says this week's unseasonal downpours in Perth and the South West are being caused by a combination of factors, including near record sea surface temperatures.

In October, the ocean off the WA coast recorded the second warmest temperature since records began in 1900.

However, forecaster Neil Bennett says while the warm ocean is contributing to the high rainfall, it is not a significant factor.

"The temperatures over the ocean will help with the amount of moisture that they can release but the actual mechanism to make it rain is that weather pattern, the deep surface trough, the low pressure system at the surface and this mid level system moving in from the West," he said.

Mr Bennett says the bureau's predicting more storms today before the weather starts slowly clearing.

"There's going to be more shower and thunderstorm activity through the South West of the State, so still some showers and thunderstorms for the metro area and even some morning showers still around on Friday, before we finally start to see things returning to what I suppose you could call normal weather conditions for this time of the year."


- ABC

© ABC 2012

More breaking news

Sydney Morning Herald
ABC News
National Nine News
News Limited

Display Your Local Weather

Weather News

SA weather: Virginia, Port Wakefield under threat as rivers burst banks

00:13 EST

The South Australian towns of Virginia and Port Wakefield are under threat from floodwaters as the Gawler and Wakefield rivers burst their banks, with warnings more rain is on the way.

WA storm blacks out homes, blocks roads as severe weather warning cancelled

20:48 EST

About 9,000 properties remain without power in Perth and Western Australia's south-west as conditions ease across the state after damaging winds brought down trees and debris.

NSW weather: Evacuation order for Condobolin as Lachlan River flood moves downstream

14:16 EST

An evacuation order has been issued for low-lying areas of Condobolin in the central west of New South Wales, as flood peaks in the Lachlan River move downstream.