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(CNN) -- The weekend before Christmas, Mother Nature is gifting -- or, rather, clobbering -- the United States with a little bit of everything. Ice storms, snow, flooding, thunderstorms, tornadoes and record-setting warmth are all in-store, and with this maddening mix comes a massive headache for more than 94 million expected holiday travelers.

Unless you're on the West Coast, odds are the weather outside is frightful and complex. To make sense of it all, let us take you on a national tour.

Southeast: Thunderstorms, tornadoes and torrential downpours

While ice storms and snow wreak havoc in parts of the country, the bigger story that's brewing is about rain and a severe storm event, says CNN meteorologist Jennifer Gray.

Harsh weather is on tap for Saturday afternoon and into the evening, with a risk of thunderstorms in Louisiana, Mississippi, parts of Arkansas, Alabama and Tennessee.

Isolated storms that form ahead of these bigger storms could become supercells, which means the possibility of tornadoes. One tornado hit Friday night in Mississippi, taking down a tree. By midday Saturday, there were two tornado watches in effect. Forecasters warn that more tornadoes -- some as strong as EF2 or greater -- may touch down in Southeast region as Saturday progresses.

Heavy rain, damaging winds and lightning are anticipated for Saturday night. These storms will spread, bringing downpours to Georgia, Florida, South Carolina and up the East Coast on Sunday.

The main trigger for the severe weather is the above average temperatures further north.

Midwest: A flood of wet worry

The warm air in this system means heavy rains across the majority of the Midwest and fears of flooding in the Ohio River Valley. Flash flood warnings and watches and flood advisories are in effect from Ohio up to eastern New York, all the way down through Indiana, parts of Illinois, Missouri and Arkansas. Anywhere from three to five inches of rain could fall in some of those areas.

Where temperatures are lower, snow will come down across Iowa, Wisconsin and into northwest Michigan. Some areas will see up to 8-10 inches of snow, others around 4-7 inches. And an ice storm is predicted in southeast Michigan.

Central Plains: Slammed with ice and snow

Power outages, falling tree limbs -- if not trees -- and treacherous roads are in the forecast for a large part of Oklahoma. An ice storm warning has been issued for the northern and central parts of the state, including Oklahoma City. Residents there are being encouraged to hunker down at home starting this evening and through tomorrow, CNN affiliate KFOR reports. They're even being warned not to park their cars beneath trees.

In Kansas and southeast Nebraska, snowfalls will total 3-6 inches. And those cold temps will keep folks shivering.

CNN's Nick Valencia has been bundled up outside Kansas City International Airport in Missouri.

"Just a few days ago people were outside in T-shirts and shorts grilling. Now this," he said. And while the roads are of serious concern, he said diehard Chiefs fans are also worrying about Sunday's game.

So far there have been no flight cancellations or delays at that airport, Valencia said. But Whitney Eichinger of Southwest Airlines told him the company is looking out for the safety of travelers.

"We are allowing customers to rebook their trip with no penalty through tomorrow," she said. "That has more to do with traveling to the airport, not flight cancellations."

Mid-Atlantic/Northeast: Weirdly warm

If there is one present being handed out on this first day of winter, it is the well-above average temperatures in the Mid-Atlantic, with record highs up to the 70s anticipated.

By Sunday, that warm weather will grace the Northeast, sending temperatures into the 60s. Already, in Boston Saturday, the temperature is in the mid-50s.

Further north, however, the situation is less cozy. In Maine and across New Hampshire, Vermont and into New York, winter weather -- including ice storm warnings and freezing rain -- are in effect.

CNN's Jennifer Gray, Nick Valencia and Matt Daniel contributed to this report.