Power companies and crews in Tennessee are bracing for the looming winter storm that is expected to not only bring snow and ice, but also cause power outages in the state.

A significant snow event will move into the Middle Tennessee region on Friday. Here's how much snow the greater Nashville area can expect.

A major winter storm, bringing significant snow accumulation, has arrived in Middle Tennessee. Here is when you can expect the snow to move out.

If the precipitation is just rain or just snow, the atmosphere is either greater than or less than 32°. When you add in a wintry mix — freezing rain or sleet — then one must evaluate the temperature at different levels of the atmosphere.

Bill Lee and the Tennessee Emergency Management Agency issued a state of emergency Thursday to provide relief across the state. Gov. Lee also announced that all state offices will be closed Friday. Here is what to know about the State of Emergency for Tennessee.

The Winter Storm Warning is in effect now across Middle Tennessee and Southern Kentucky. It started at midnight Friday and will last until 6 a.m. Saturday for Lincoln, Moore and Franklin Counties. The rest of Middle Tennessee and Southern Kentucky are under the warning that started at 3 a.

Snow is expected to begin mid-morning for East Tennessee cities such as Knoxville, Gatlinburg and Oneida, and in early afternoon for those further north, closer to the Virginia state line, according to the National Weather Service.

The storm will bring "widespread snow accumulations" with a mixture of sleet and freezing rain possible south of Interstate 40 with "light ice accumulation possible."