热带风暴“艾萨克”再度减弱

U.S. weather forecasters have downgraded Tropical Storm Isaac to a depression but warn the danger to the southern United States from the system is not over.

The National Hurricane Center says the slow-moving Isaac weakened over northern Louisiana Thursday.  The system is expected to produce more rain as it moves toward the north.  Forecasters say isolated parts of Louisiana, Mississippi, Alabama and Arkansas could get as much as 63 centimeters of rain through Friday.

The hurricane center warned there could still be more flooding across southeastern Louisiana and Mississippi and that tornadoes are possible.

Forecasters are now keeping a close watch on another tropical Storm  Kirk.