Isaac weakened to a tropical storm with maximum sustained winds of 70 mph early Wednesday afternoon.  At 2 pm., Isaac was about 50 miles west southwest of New Orleans and about 55 miles south southeast of Baton Rouge, La. It is currently moving to the northwest at 6 miles per hour. This general motion is expected to continue through tonight, followed by a turn to north northwest by Thursday night or early Friday. The center of Isaac will move farther inland over Louisiana today and tomorrow and over southern Arkansas by early Friday.