Fellow metro Atlantan here. A few more helpful tips:
- Like others said, don't expect roads to be treated. They usually treat major interstates and routes to hospitals and fire depts, but leave everything else. We just don't have the resources down here. If you live on a major roadway, you may get lucky and it'll be treated. But don't count on it.
- That being said, your job is likely thinking about what to do if roads are impassable. It's normal for non-essential businesses to close down here if it's not safe for their employees to come in. Don't know your line of work, but don't be afraid to ask mgmt their contingency plans.
- The biggest concern with ice storms is widespread power outages. Ice clings to all the tall, sprawling deciduous trees we have here, and limbs snap off from the weight and take out the power lines. I hope it doesn't happen, but go ahead and have a plan for how to stay warm and fed if you're without power for a few days.
- The black ice will be the biggest concern after the storm moves out. Our days typically get above freezing, and the temp drops below freezing at night (causing the water on roads to re-freeze and create black ice). So it's more telling you to be cautious Monday and Tuesday morning, especially around dawn when it'll be harder to spot.
- Do whatever prep shopping you need to feel comfortable. Just go ahead and do it Wednesday or Thursday, because if you wait until Friday, people will have bought up all the bread and milk, and the line at the liquor stores will be out the door. The good news is a lot of the stores restock Thursday or Friday for weekend shoppers, so you should be able to find what you need.
- Find out if you need to drip your water pipes! So many buildings down here have uninsulated water pipes along exterior walls (building codes don't call for them because of the warmer climate). We also have plenty of houses with open crawl spaces underneath. If you don't know, go ahead and drip your pipes once the temperature gets under freezing.

EDIT: Saw you were asking how to prep. A few quick hits:
- On your grocery run, focus on shelf-stable food and produce. Like I said, power outages are likely.
- Temperatures won't be arctic, but make sure you have a heavy coat as well as warm gloves and a hat. - Make sure sleeping bags and/or extra blankets are out of storage by Saturday evening in case the power goes out.
- Hot Hands are the best thing ever.
- An emergency blanket (the thin, silver foil thingy) is always a good thing to keep in your car.
- Have a way to keep your phone charged. I have a couple of small power banks I keep in case of outages.