About 4000 properties are without power as damaging winds and rain sweep across South Australia.

An intense weather system will impact the state’s central and southeast districts on Thursday bringing warnings of dangerous road conditions, rough seas and high coastal swells.

A severe weather warning has been issued for Eyre and Yorke peninsulas, the mid-north and the southeast with wind gusts of up to 110 km/h forecast.

SA Power Networks says power is out for some customers on the west coast, on Yorke Peninsula and across the Adelaide metropolitan area.

There’s also been reports of trees down, although the State Emergency Service says it has only responded to five calls for help so far.

The Bureau of Meteorology says areas from Ceduna, on the west coast, to Renmark in the Riverland will feel the brunt of the intense weather system.

“This is due to a cold front linked to a low to our south which will also bring with it squally showers and possible thunderstorms and small hail,” bureau acting state manager Catherine Kennedy said.

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“Conditions will be hazardous about southern coastal areas with rough seas and heavy swells expected, with significant wave heights of five to seven metres.”

The bureau said Adelaide would feel the worst of the winds and rain from midday on Thursday and into the evening.

In the Adelaide Hills, rainfall could reach 40 millimetres with about 20 millimetres expected in the city.

The SES also urged motorists to be careful on the roads and remain vigilant for changing conditions.

AAP