The weather forecast on Tuesday morning for Dayton was expected to be dry and sunny, with a low of 10 below.
A low of 9 was expected for the Nashville metro area, which is experiencing a severe drought.
But the weather for Nashville could change by as much as 15 to 20 degrees over the next two days.
The weather was expected across the Tennessee River Valley as well as the southeastern United States.
A high of 16 would be expected in southern Alabama and Georgia.
The forecast was dry and humid across the region, with rain expected to spread over the northern parts of Tennessee and Georgia by the middle of the day.
Forecasters said it would rain for a few hours at the start of the storm and be dry by evening.
It was expected that it would be mostly cloudy and foggy.
The storm was moving north at 5 mph and expected to become a heavy rain event by Tuesday morning.
The heaviest rain is expected to fall in Tennessee, with up to 1 inch of rain expected over a half hour.