11.   As the sun heats the sultry air, severe thunderstorms will erupt in parts of the interior Northeast on Sunday afternoon.

12.   As this corridor of sultry air intercepts a slow-moving warm front, thunderstorms will erupt later Tuesday over the Middle Mississippi and lower Ohio Valleys.

13.   As warm, humid air is drawn northward from the Gulf of Mexico, scattered thunderstorms will erupt near the coast of the gulf and in northern Florida.

14.   As the front draws closer, isolated thunderstorms will erupt Monday afternoon near the Great Lakes and over upstate New York.

15.   As the front presses toward the warm and humid southern Middle Atlantic and Southeast coasts, some thunderstorms will erupt.

16.   As the leading edge of cooler air encounters warm, unstable air, scattered thunderstorms will erupt.

17.   As the jet stream disturbance intercepts an unusually sultry air mass, scattered severe thunderstorms will erupt from the Red River Valley to the middle Mississippi Valley.

18.   As the atmosphere becomes increasingly unstable on warm, humid, sunny days, thunderstorms often erupt.

19.   As the disturbance encounters humid air, strong thunderstorms will erupt later Wednesday over parts of West and Central Texas.

20.   As the leading edge of the cold air surges south, thunderstorms will erupt from eastern Oklahoma to Indiana on Sunday.