An extremely dangerous outbreak of tornadoes will endanger many lives and property from northeastern Texas into Arkansas, northern Louisiana, northwestern Mississippi and western Tennessee this afternoon into tonight.

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These are the same areas that were just hit by tornadoes Monday afternoon and night, and today's outbreak is expected to be worse than Monday's. Large, long-track tornadoes are a major concern through tonight.

"It's a very dangerous day," said AccuWeather.com Senior Meteorologist Henry Margusity. "It's the kind of day where tornadoes could cause massive destruction."

The Little Rock, Ark., area is at risk again after multiple tornadoes, including one large twister, just tore through Monday night.

Thunderstorms were starting to initiate over northeastern Texas and southwestern Arkansas around mid-afternoon and will continue developing and becoming more widespread and powerful into this evening.

The thunderstorms and tornado danger will reach the western Tennessee Valley by tonight, before shifting farther east through the Tennessee and Ohio Valleys Wednesday into Wednesday night.

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Cities at high risk this afternoon into tonight include Dallas and Tyler, Texas, Broken Bow, Okla., Little Rock, Ark., Shreveport, La., Batesville, Miss., and Memphis, Tenn.

The threat Wednesday includes Meridian, Miss., Birmingham and Huntsville, Ala., and Nashville and Knoxville, Tenn.

There is concern that some of the tornadoes today into Wednesday will be strong (EF3 tornado ranking or higher) and long-tracking.

These types of tornadoes have the potential to produce damage similar to what was endured at St. Louis' Lambert Field on Friday evening or across North Carolina two Saturdays ago.

"People should review tornado safety guidelines and take any [severe thunderstorm or tornado] watches and warnings very seriously," stressed Kottlowski.

Those residents being threatened by the tornadoes at night should take extra precautions to ensure they do not sleep through vital tornado sirens or warnings.

Tornadoes are not the only concern through Wednesday. Many of the strongest thunderstorms will unleash strong winds that may do more widespread damage than the tornadoes themselves. Hail up to the size of baseballs and softballs will also be unleashed.

Flooding downpours and hail will also be produced. Flash flooding kills more people in the U.S. every year than tornadoes do, and most of the deaths happen when people attempt to drive across a roadway covered with water.

Never attempt to cross a flooded roadway. Always turn around and find an alternate route.

Once the tornado outbreak winds down Wednesday night, residents from the southern Plains to the South will welcome a much needed quiet spell Thursday into Friday.