21.   As the potent July sun heats the muggy air, rising currents of air will produce billowy cumulus clouds, a few of which will yield afternoon thunderstorms.

22.   As the potent July sun heats the uneven terrain, isolated afternoon thunderstorms will develop across interior sections, however.

23.   As the potent summer sun heats the humid air, ascending currents of air will cause clouds and spotty thunderstorms.

24.   As the sun heats the ground and overlying atmosphere, vigorous currents of rising air will generate clouds and spotty showers, some of which will produce small hail.

25.   As the sun heats the humid air, scattered showers and thunderstorms will form from southern New England to the eastern Gulf of Mexico.

26.   As the sun heats the sultry air over the region, ascending currents of humid air will yield numerous thunderstorms.

27.   But as the potent July sun heats the ground, rising currents of air will cause puffy cumulus clouds to form in the afternoon.

28.   Meanwhile, the sun heats the ground and warms more air, which keeps trying to rise.

29.   On Sunday afternoon, as the sun heats the humid air, vigorous currents of rising air will yield powerful thunderstorms in central Texas.

30.   That is, as the sun heats the top of a mountain, the high ground heats the air in contact with it.