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Severe storms, isolated tornadoes to threaten Deep South Tuesday evening

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Following multiple incidents of damaging winds from Monday, more severe thunderstorms will threaten lives and property over part of the Deep South during Tuesday evening. The threat includes the potential for a few tornadoes.

For a portion of the lower Mississippi Valley, this will be the second night in a row of severe weather.

A lack of high humidity limited the bulk of Monday's severe weather to strong wind gusts. However, a surge of warm and humid air on Tuesday may set the stage to allow a few of the strongest storms to produce a tornado.

The greatest risk of tornadoes will extend from central and eastern Louisiana to western and central Mississippi and southwestern Tennessee. The threat includes the cities of Baton Rouge and Monroe, Louisiana, as well as Jackson and Tupelo, Mississippi.

The first severe storms are likely to form late Tuesday afternoon.

"The most likely time for a tornado to spin up will be from 5 p.m. to 11 p.m. local time," according to AccuWeather Meteorologist Brian Thompson.

Should a tornado form, it could be on the ground for more than a couple of minutes with the set of weather ingredients in place. Some of the tornadoes could be wrapped in rain, making them difficult to see.

Since most of the severe weather will occur after dark, the danger factor will be elevated.

"As the isolated severe storms move eastward, they will likely form into a squall line," Thompson said.

A squall line is a continuous line of severe thunderstorms.

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"Once this happens, the main threat will shift from tornadoes to damaging wind gusts on a more regional basis from southeastern Louisiana to Alabama and central Tennessee," Thompson said.

People should avoid parking or stopping beneath large trees as the storms approach. Winds in some of the storms will be strong enough topple trees and break off large tree limbs.

In addition to the threat of a few tornadoes and more regional damaging wind gusts will be the risk of localized flash flooding.

People should should never attempt to drive through flooded areas as the road may have been compromised beneath or swift-moving water could sweep your vehicle away.

Cities that could be hit with severe thunderstorms and urban flooding later Tuesday night include Nashville, New Orleans and Birmingham, Alabama.

"While the severe weather and flash flooding threat certainly are not good news, the rain will fall in areas of exceptional drought that have not received much rain during the past few months," Thompson said.

People in the alert area are advised to stay up-to-date on the situation and to keep a weather radio nearby.

During Wednesday, the risk of violent thunderstorms will have ended over the lower Mississippi Valley. A few locally heavy, gusty thunderstorms can occur farther east from northern Florida to New York state into the evening hours.