As is often the case with winter storms in Middle Tennessee, the dividing line where cold air and wet air will meet is, well, up in the air.
The National Weather Service has issued a winter storm watch for the potentially hazardous conditions that may result over the weekend, as a low-pressure system that is expected to move along the Gulf Coast region late this week will push moisture from the Gulf north, where it will meet colder air being pulled down from the north.
NWS predicts the storm will move across the Midstate from late Thursday into Saturday morning, with snow and ice accumulations expected.
Wintry precipitation is expected to begin developing in areas west of Nashville on Thursday night, with light snow and ice accumulations possible by daybreak Friday.
Areas to the north of Interstate 40 are expected to get mostly snow while areas to the south are expected to get a mix of snow, sleet and freezing rain.
Much colder air will spread across the entire Midstate on Friday night, with temperatures expected to plummet into the teens and single digits on Saturday.
Mixed precipitation will change to all snow and additional snow accumulations will be possible across the area Friday night and possibly into Saturday morning.
The NWS says there is still some uncertainty regarding the exact timing, types and amounts of precipitation. However, significant effects from winter weather are expected.