Severe thunderstorms, heavy rain, and flooding are possible in the region starting Monday evening and continuing through Tuesday night, according to the National Weather Service in Morristown.

Isolated tornadoes are possible, mainly across the Cumberland Plateau and southern half of the Tennessee Valley, the Weather Service said. A tornado watch remains in effect until 8 p.m. Monday for southwestern Virginia and East Tennessee. The watch includes Anderson, Blount, Campbell, Knox, Loudon, Morgan, Roane, and Scott counties, among others.

The flood watch is in effect from 8 p.m. today until 8 a.m. Tuesday.

The National Weather Service said its main concerns are the isolated tornadoes, widespread damaging winds that could cause power outages due to fallen trees and power lines, and heavy rainfall producing flash flooding. Large hail is also possible.

The forecast near Oak Ridge calls for a 60 percent chance of heavy rain this afternoon, with a 100 percent chance of severe thunderstorms tonight. [Read more…]