At 8 p.m.: Isaac is history; Hurricane Kirk, TS Leslie form

The National Hurricane Center notes that Isaac has been downgraded to a depression but continues to drench southeastern Louisiana and Mississippi with heavy rainfall, and a significant storm surge continues.

All coastal warnings have been discontinued. No more updates on Isaac will be released.

The 5 p.m. NOAA hurricane update put newly formed Tropical Storm Leslie on the map. It's about 1,000 miles east of the Windward Islands and may become a hurricane in the next day or two, but is not expected to reach the U.S.

The storm Kirk has been upgraded to a hurricane, and is located about 1,500 miles west-southwest of the Azores. It also appears to be no threat to the United States.

 The newly formed TS Leslie is located about 1,125 miles east of the Windward Islands.