Louisiana's governor has declared a state of emergency as a slow-moving area of storms lumbers toward the state from the Gulf of Mexico, bringing the possibility of flash floods and stormy seas.

Gov. Bobby Jindal says the National Weather Service is not predicting a hurricane but says a tropical storm is likely and could dump 12 to 15 inches of rain onto coastal and inland areas over the next 48 hours.

Low-lying Lafourche Parish president Charlotte Randolph also declared a state of emergency.

He says coastal parts of the parish might get up to 18 inches of rain through Monday.

Jindal says the emergency will last through Friday.