"Even though Nate has made landfall and will weaken today, we are still forecast heavy rain from Nate to spread well inland towards the Tennessee Valley and Appalachian mountains," ABC News meteorologist Daniel Manzo said Sunday morning.
Around 2:30 a.m. ET, a tornado watch covering most of southern Alabama and part of the Florida Panhandle was issued. It is in effect until 11 a.m.
Nate had made its second landfall as a Category 1 storm around 1:30 a.m. ET Sunday along the Gulf Coast near Biloxi, Mississippi with maximum winds of 85 mph, slamming some Mississippi and Alabama communities with a storm surge of between four to five feet.
Nate made its first landfall Saturday night as a Category 1 storm near the mouth of the Mississippi River on the southeastern Louisiana coast.
Officials in Louisiana, Mississippi, Alabama and Florida were well-prepared for Nate's arrival, however, with its governors declaring states of emergency and mandatory or voluntary evacuation orders.
Even though Nate's wrath was not as terrible as expected, more than 100,000 customers across Alabama and Mississippi were without power as of 6 a.m. ET. In Alabama, 56,250 customers were without power, while 46,487 customers in Mississippi were without power.
In New Orleans, the mayor said some areas outside of the levee protection system could see a 7-to-11-foot storm surge.