* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of south central and southwest Louisiana, including the following parishes, in south central Louisiana, Lafayette, Upper Iberia and Upper St. Martin. In southwest Louisiana, Northern Acadia, Southern Acadia and Upper Vermilion. * WHEN...Through late tonight. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur