A major storm front stretching from northern Western Australia to Victoria's west and a throw-off system extending into southern Queensland are expected to deliver heavy rain, hail and destructive winds.

The risk of heavy weather was likely to develop on Saturday evening, escorted by a cold front sweeping the continent from west to east, Bureau of Meteorology senior forecaster Miriam Bradbury said.

"Storms are possible across a great central band of the country, extending from the Kimberley ... all the way down into Victoria," she said.

"We're also possibly going to see some storms about parts of the central Queensland coast."

Severe storms triggering high winds, giant hail and flash floods were possible for SA's northwest pastoral and west coast districts into Sunday, while similar co

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