Mississippi Gov. Phil Bryant closed all state offices impacted by winter weather, including those in the Jackson area Capitol Complex, for Tuesday.
Bryant says in a news release that state agency directors have discretion on bringing in essential personnel for the day.
The National Weather Service said conditions would worsen during the day as the arctic air surges into Mississippi.
Alan Campbell, a meteorologist with the National Weather Service in Jackson, said there was a band of light to moderate snow and sleet across the much of the state from Macon and Canton south to the coast early Tuesday.
Most of the traffic problems were reported south of the Interstate 20 corridor.
Citing accumulating snow and ice, Natchez Trace officials issued an advisory recommending travelers avoid the stretch of parkway from the intersection of Interstate 20 (near milepost 88) south to Natchez. Travelers are also urged to proceed with caution north of I-20 to Kosciusko (near milepost 160).