(WLTX) - Isaac is now a hurricane as it prepares to make landfall in Louisiana.
The National Hurricane Center sent an update just before 12:30 p.m. Monday saying that hurricane hunter aircraft had noticed an increase in strength.
The storm currently has 80 miles an hour sustained winds, making it a Category 1, the weakest rating for a hurricane. For a storm to be a hurricane, it must have sustainded winds in excess of 74 miles an hour.
A hurricane warning is in effect from the western tip of the Florida panhandle to the Mississippi River delta in Louisiana.
WLTX will continue to follow the storm here on WLTX.com, on air on News19, and on via Twitter @WLTX and our Facebook page.