ATLANTA (AP) — Across the South, residents stocked up on fuel and groceries, schools and offices closed, and road crews were at the ready as a storm moved in Tuesday from the central U.S., threatening to bring snow, ice and subzero temperatures to a region more accustomed to air conditioners and sunscreen than parkas and shovels.

Even with the timing and severity of the blast of freezing precipitation uncertain, officials from parts of Texas to southeastern Virginia warned motorists to stay off the roads and remain inside.

Popular warm-weather tourist destinations including Charleston, S.C.; Savannah, Ga.; Pensacola, Fla.; Virginia Beach, Va.; and New Orleans were expecting ice and snow over the next two days— rare occurrences in places that seldom even see prolonged sub-freezing temperatures.

At an Ace Hardware store in the north Georgia town of Cumming, snow shovels were in short supply, but manager Tom Maron said feed scoops - often used in barns - could be used if necessary. Workers expected brisk business, with patrons buying insulation, faucet covers, portable heaters and other cold-weather gear.

"We're fixing to put the ice melt out, and we've got plenty of sand here to mix in," Maron said shortly before dawn Tuesday.

Much of Georgia was placed under a winter storm watch for Tuesday and Wednesday. While some areas could see as much as 3 inches of snow, the bigger concern with plummeting temperatures was ice.

"The snowfall amounts are going to matter very little in this situation because of the ice potential," said Jason Deese, a meteorologist for the National Weather Service in Peachtree City, Ga. "Some parts of the state may end up seeing the greatest impact just because they get more ice than snow."

In the Hampton Roads area of Virginia — which forecasters said could see a foot of snow — store shelves started emptying of staples such as bread by Monday night. Schools and businesses planned to close early, with the storm expected to further clog an already-busy afternoon commute.

In Alabama, snow began falling before dawn in the extreme northwest portion of the state.

In coastal Charleston, it was a balmy 62 degrees Monday. But the approaching weather led the College of Charleston to cancel classes Tuesday. There was a forecast of rain, and sleet in the late afternoon, with the first snow expected Wednesday morning.

Delta Air Lines officials said 1,850 flights have been canceled ahead of the storm. The airline is offering travelers the opportunity to make one-time changes to tickets without a fee if they're traveling through Georgia, Alabama, Florida, Louisiana, Mississippi, the Carolinas and Texas.

Meanwhile, in the Midwest, plummeting temperatures and increasing winds took root for another day even as the storm moved south. Several states in the central U.S. saw schools and other facilities close for a second consecutive day as dangerous wind chills were predicted. In Minnesota, forecasters said wind chills could reach 35 to 50 degrees below zero.

In the Carolinas, many school districts were running on half-day schedules Tuesday so students could head home before the worst of the storm system hit. In North Carolina's Outer Banks, barrier islands that are popular with tourists during the warm seasons, residents were bracing for as much as 8 inches of snow.

Several inches also were expected in South Carolina, where the state department of transportation planned to send crews out Tuesday to treat roads with sand and brine to ease any troubles caused by ice.

Elsewhere, some schools and government offices already closed in Mississippi ahead of the rare snow event.

"This is a very dangerous situation because snow and ice are very rare for extreme southern Mississippi," Robert Latham, executive director of the Mississippi Emergency Management Agency, said in a news release. "We need everyone to have an emergency plan together for this."

In Louisiana, state Public Service Commission Chairman Eric Skrmetta told residents to be prepared by stocking up with food, fueling cars and making sure to have cash on hand, calling the icy forecast for the next couple of days "decidedly grim."

Donna Vidrine, a cashier at Simcoe Food World in Lafayette, said her store was already busy Monday.

"They're buying things like canned goods — nonperishable items — and bottles of water and diapers for their baby," she said.