* WHAT...Isolated minor coastal flooding expected. * WHERE...Kenedy Island, Willacy Island and Cameron Island Counties. * WHEN...Through Thursday morning. * IMPACTS...Wave run-up may approach the dunes along narrow beaches. Beach equipment, such as umbrellas and chairs, could be moved by waves. Vehicles driving along narrow beaches may experience higher water levels. Elevated water levels may also occur across the Laguna Madre and South Bay, and along State Highway 4 west of Boca Chica State Park. Do not drive through flooded roadways.