From the National Weather Service:
A powerful storm system will move into the midstate tonight.
This storm system will interact with an increasingly unstable air mass and very strong atmospheric winds to produce severe thunderstorms beginning along the Tennessee River around midnight tonight and spread eastward.
The main threat appears to be damaging straight-line winds, but a few isolated tornadoes are possible along the line as well.
In addition a tight surface pressure gradient will cause frequent gusts at more than 35 mph this afternoon and into Wednesday with possible gusts at more than 45 mph tonight.
Tree limbs will likely be downed and loose objects blown around. Entire trees may be blown down and power outages may occur. Also difficult driving conditions can be expected.
Warning from Monday:
A powerful cold front will push across the midstate late Tuesday into Wednesday.
Unseasonably warm moist air is expected ahead of the front with temperatures in the 60s and 70s. This warmth will help provide fuel for widespread showers and strong to severe thunderstorms to form along the front.
Ahead of the front gusty south winds will increase significantly Tuesday night with south winds of 25 to 35 mph and gusts up to 45 mph possible at times. These strong winds may lead to some downed trees and power lines.
Along the cold front a squall line of showers and strong to severe thunderstorms is expected to form and reach the Tennessee River around or after midnight Tuesday.
The front will then quickly push across Middle Tennessee before exiting the region Wednesday morning.
Some of these storms could contain damaging winds heavy rainfall and isolated tornadoes.
Stay tuned to NOAA weather radio or your local media for the latest updates on this potential severe weather situation.