Two forecast models demonstrate the uncertainty of the track and moisture that will determine how much wintry weather the Lowcountry sees starting on Tuesday.

National Weather Service locations across Texas have forecast totals from a half-inch to five inches of snow between Monday and Tuesday.

Snow was falling in the Mid-Atlantic and New York City on Sunday. The coldest air in several years will descend across much of the country starting Monday, forecasters said.

See which towns have the highest snowfall totals as of Sunday night, and where lightning and thundersnow occurred.

The NWS has issued storm and extreme cold warnings this weekend as powerful Arctic winds plunge temperatures nationwide.

The National Weather Service issued a winter storm watch at 1:27 p.m. on Sunday valid from Tuesday noon until Wednesday 6 a.m. for Coffee, Dale, Henry, Geneva and Houston counties.

It's been a while since it last snowed in Mobile, but snow is in the forecast for the city on Tuesday, and a winter storm watch is in effect. The photo above is from the Mobile office of the National Weather Service from a rare south Alabama snow in December of 1996. Joe Maniscalco/National Weather Service

Arctic air has arrived in Central Texas. Much of Central Texas will be under a Winter Storm Warning starting Monday at 6 p.m. AUSTIN, Texas - Much of Central Texas is bracing for bitter cold Monday and Tuesday after arctic air arrived Saturday.

Tens of millions of residents along the East Coast are bracing for several inches of snow Sunday followed by dangerously cold temperatures that will<a class="excerpt-read-more" href=" More

DOTD has also been watching the maps closely, and they have a strategy when it comes to which areas get the most salt.

We will likely experience temperatures at or below freezing starting this evening and continuing through Wednesday morning