Severe thunderstorms will break out across parts of the southern PlainsThursday afternoon as a storm tracks into Oklahoma.Scattered, intense thunderstorms will initially form over eastern Oklahomaand northeastern Texas during the afternoon. These particular cells will becapable of producing large hail and tornadoes as they track to the east.

By Thursday night, the thunderstorms will likely merge into one large squallline, which will race eastward through southern Missouri, Arkansas and northernLouisiana. The greatest threat from the squall line will be damaging wind gustsin excess of 70 mph.

Heavy rainfall will greatly reduce visibility for travelers and causeponding on roadways with poor drainage.

Story by AccuWeather.com Senior Meteorologist Brett Anderson.