THUNDERSTORMS, damaging winds and rain are sweeping South Australia as the Bureau of Meteorology issues a severe weather warning for parts of the state.

Squally showers and gusts of wind struck metro Adelaide about 3.30pm, just in time for school pick up.

The bureau has warned for wind gusts of about 90km/h in areas including the Adelaide metropolitan, Mount Lofty Ranges, Lower Eyre Peninsula, Kangaroo Island, Upper South East, Lower South East, Yorke Peninsula and Murraylands.

Showers and thunderstorms are also hitting parts of these areas.

Affected locations could include Port Lincoln, Mount Gambier, Murray Bridge, Kingscote, Naracoorte and Bordertown.

The SES urges people to move vehicles undercover and away from trees, secure loose items and stay indoors during the storm.

Squally front due to reach #Adelaide around 3:30pm with brief intense showers and possible wind gusts in excess of 90km/h. pic.twitter.com/pMI6xh0w7j — Bureau of Meteorology, South Australia (@BOM_SA) July 23, 2018