Freddie Zeigler, a National Weather Service meteorologist in Slidell, La., said there's an 80 percent chance of rain Tuesday, with showers likely hitting in the pre-dawn hours along Louisiana's coast and moving into the metro area around sunrise.
Still, lulls are predicted throughout the day.
"It's going to be dicey though for parades, but it all depends on how fast that warm front moves to the north," Zeigler said.
Before dawn, riders in the Zulu parade -- the first of the day's float processions
-- boarded floats staged at the city's huge convention enter. They loaded aboard the trinkets, beads, doubloons and other throws that hundreds of thousands would be clamoring for in a matter of hours.
Zulu was scheduled to parade at 8 a.m., followed by the parade of Rex, King of carnival, two hours later. Behind them would come hundreds of trucks decorated by families and social groups.
Street marching groups would go ahead of Zulu and Rex, with clarinetist Pete Fountain's Half-Fast Marching Club leading the way shortly after dawn. Others with colorful names such as the Jefferson City Buzzards would follow, tossing beads to the crowds along stately St. Charles Avenue and winding their way into the city's business district.
Fountain and his clubmates were clad in garish red suits and hats as they got ready to march in the Garden District.
Fountain no longer walks the route, but rides a wheeled trolley. As he boarded under the early light peeking through overcast skies, parade-goers snapped photos with camera phones.
Fountain wasn't worried about the rain forecast.
"This is my life," he said, referring to his 63rd parade with the group. "We're going to make it before it rains."
Bob Johnson sipped on a screwdriver as he prepared to march with Fountain. "This is a half-healthy drink," he joked.
Johnson has done parades on floats and has been with Fountain's street marchers for six years. "It's a whole different perspective than riding a float. You can get right up to people," he said.
In the French Quarter, where the revelry almost didn't stop overnight, crowds were expected to cruise down Bourbon Street, pleading for beads from revelers on balconies. Traditionally, the French Quarter is the scene of Mardi Gras' most ribald activities, while the streetcar line along St. Charles is given over to family groups who set for a day of barbecues and parade watching.
Parading was planned across south Louisiana and the Gulf Coast. In Louisiana's Cajun parishes, the tradition of the Courir du Mardi Gras was set to start after dawn, as groups of maskers on horseback would ride from community to community making merry.
Rain or shine, many revelers planned to hit the streets early Tuesday morning. It was their last chance for the Carnival season, which ends with the stroke of midnight Tuesday night. After that, the solemn season of Lent replaces the revelry until Easter.
"We're going to get here extremely early," said Carly Gerhard, who drove with a friend from Philadelphia to New Orleans over the weekend
-- through storms that spawned tornadoes along the way -- for her first Mardi Gras experience.
[to top of second column]
Gerhard said her most memorable experience so far has been the French Quarter.
"My favorite part was getting to Bourbon Street and seeing all the different people," she said Monday. "The diversity is pretty cool. We're looking forward to the parades. We're looking forward to it all."
Frank Warford, of Riverdale, Ga., was holding an umbrella Monday as he walked Bourbon Street. He said he was ready to party through the rain.
"This is a party city. Everybody's partying and having fun, catching beads like crazy," said Warford, his neck draped in beads. "If it rains, put a hat on. It's as simple as that."
Katiey Diamond, of Sayreville, N.J., said rain won't ruin her Mardi Gras.
"I'll party if it's freaking thundering," she exclaimed. "We've got indoors. We're good."
Scattered showers didn't keep revelers away Monday either as thousands flocked to the French Quarter and along the Mississippi River for Lundi Gras festivities.
As local brass bands played on stages set up along the river, Jim and Sheron Rogers of Bay St. Louis, Miss., beers in hand, said they hadn't missed a Mardi Gras since 1990, and that come rain or shine they were taking in this one.
"We just love it," Sheron Rogers said. "The people, the music. It's just a beautiful, fun city."
Many said they weren't going to let the rain or weekend shooting on Bourbon Street wreck the party.
"You can't let the threat keep you from having a good time," Jim Rogers said.
Deron Bridgewater, 23, of Marrero, La., faces four counts of attempted first-degree murder for the weekend's quadruple shooting during the final weekend of revelry that culminates with Mardi Gras.
Bridgewater surrendered Monday after seeing his photograph on a television newscast Sunday night, New Orleans police spokesman Frank B. Robertson III said. Police have issued an arrest warrant for a second suspect in the shooting and authorities sought a third person who is believed to have critical information regarding the shooting, Robertson said.
Press; By STACEY PLAISANCE and MICHAEL KUNZELMAN]
Copyright 2013 The Associated
Press. All rights reserved. This material may not be published,
broadcast, rewritten or redistributed.