Sally will be the third hurricane to make landfall on the Gulf Coast this year.
Slow-moving Hurricane Sally is taking aim on the Gulf Coast where it’s expected to bring coastal flooding and dangerous storm surge.
Sally is expected to crawl very slowly across the northern Gulf of Mexico over the next 24 hours and will make landfall some time Wednesday morning with possible Category 1 hurricane winds topping 85 mph.
As Sally makes landfall on the Alabama and Mississippi border on Wednesday, the highest storm surge should be from Louisiana into Mississippi and east to Mobile Bay, Alabama, where the water is expected to rise 6 to 9 feet.
Storm surge of up to 4 feet is possible even in Florida and parts of Louisiana’s Lake Pontchartrain, which is located on the northern side of New Orleans.
Rainfall totals could reach 30 inches in eastern Mississippi, Alabama and into the Florida panhandle.
Sally will then crawl inland over Alabama and Georgia, where historic rainfall and flooding are possible.
Up to a foot of rain could fall from central Alabama to Georgia and northern South Carolina, including Atlanta and even into Charlotte, North Carolina, where major flash flooding is expected.
Florida police on Tuesday began closing the Pensacola Bay Bridge, which connects Pensacola with Pensacola Beach.
“We urge you to stay home and off the roadways if you can,” Pensacola police said.
Alabama Gov. Kay Ivey ordered beaches closed Monday afternoon and said she was “recommending an evacuation, especially of non-residents, and those living in flood-prone areas south of I-10.”
“Locals will need to prepare their homes, businesses and personal property for imminent storm surge, heavy rain and flash flooding,” Ivey said.
New Orleans Mayor LaToya Cantrell said residents outside the levee protection system must evacuate.
In Hancock County, Mississippi, officials ordered a mandatory evacuation for low-lying areas.
In Biloxi, Mississippi, casino resorts were ordered to close by Monday afternoon.
“We have two concerns,” Biloxi Mayor Andrew Gilich said Monday. “First, that our residents are taking this seriously and have made preparations, and second, that this is a slow-moving storm, which means we’ll see heavy flooding along the front beach and in low-lying areas, especially along the rivers and Bay.”
“Residents need to have a plan and follow that plan,” he said.
Sally is the seventh hurricane so far this season; the average at this time is six.
Sally will be third hurricane making landfall along the Gulf Coast this season.
The storm will also be the fourth hurricane to make landfall in the U.S. this season. The last time the nation had more than four hurricanes to make landfall was in 2005 when there were five, including Hurricane Katrina.
This report was featured in the Tuesday, Sept. 15, 2020, episode of “Start Here,” ABC News’ daily news podcast.
“Start Here” offers a straightforward look at the day’s top stories in 20 minutes. Listen for free every weekday on Apple Podcasts, Google Podcasts, Spotify, the ABC News app or wherever you get your podcasts.