More Severe Storms from South Dakota to Tennessee

May 4, 2012; 5:35 AM ET
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Yet another round of damaging severe thunderstorms will erupt from the central Plains to the Ohio Valley this afternoon into tonight.

Cities that will need to be on the lookout for violent thunderstorms include Sioux Falls, S.D., Omaha, Neb., Cedar Rapids, Iowa, Indianapolis, Ind., Louisville, Ky., and Cincinnati, Ohio.

Many of the same places that have been slammed with severe storms over the last few days will once again be at risk this afternoon and tonight.

As has been the case for the last several days, lingering, slow-moving frontal boundaries will be the focus for more damaging thunderstorms to ignite. These boundaries have been responsible for the powerful storms that have pounded parts of the Midwest in recent days.

Wind gusts to 70 mph and large hail to the size of baseballs ravaged places from Nebraska to Illinois on Thursday. Along with the strong winds and large hail, a tornado touched down near Wayland, Iowa, later Thursday evening. The twister caused heavy damage to a house according to a storm spotter.

Today, the greatest threats will continue to be strong, damaging winds and large hail. Gusty straight-line winds can cause significant damage to trees and power lines, which can lead to power outages. Potent wind gusts can also cause damage to homes and small structures.

Hail that grows big enough can cause damage to vehicles and vegetation. Park your car in a garage and bring tender vegetation inside.

RELATED: New York City, Philadelphia, DC Severe Storm Risk

While an outbreak is not expected, some of the strongest storms can spawn a brief tornado. Heed all watches and warnings and be prepared to take action if a watch or warning is issued for your area.

With plenty of moisture to work with, any thunderstorm will be capable of torrential and drenching downpours. This is a concern for motorists as very heavy rain can reduce visibility to just a few hundred feet for a brief period of time.

Torrential downpours can also cause flash flooding. Heavy rain in a short amount of time can cause ponding on roadways. In some cases, roads can become completely covered with water.

Low-lying and poor drainage areas are especially at risk for flash flooding.

If you approach a water-covered roadway, turn around and seek a safer alternative route to reach your final destination.

Tonight, damaging thunderstorms will spread eastward into southern Ohio and western West Virginia.

Residents across the southern Plains will also need to keep an eye to the sky later this evening and early tonight.

A boundary separating very dry air from very moist air will be the focus for strong to severe thunderstorms.

While these storms are likely to be more isolated, any single storm can still pack a punch and cause damage.

Continue to check back often with AccuWeather.com for the latest severe weather updates.

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