31.   During summer when thermal contrast is minimal, weather systems move half as fast.

32.   Each system has a little weather system attached it.

33.   During summer when thermal contrasts are minimal, weather systems move half as fast.

34.   During summer, when thermal contrast is minimal, weather systems move half as fast.

35.   During the summer season, small-scale weather systems like Florida thunderstorms and California desert wind storms can make forecasting for space shuttle landings especially challenging.

36.   Emerson Research, a branch of Emerson Radio Corp., introduced a new model clock radio this year that incorporates a weather alert system.

37.   Forecasters say some relief for broiled Central Texans could occur over the next few weeks as sporadic weather systems containing some rain work their way into the Austin area.

38.   Forecasters say the weather system that has soaked the area is beginning to break up but more rain is likely through the weekend.

39.   From that stage, it was simply a matter of keeping Club Med together and staying in phase with the ever-changing weather systems.

40.   Given the typical spacing between weather systems, a second powerful low pressure system centered over Lake Superior will lash the Middle West on Friday.