Keep track of the weather. On an outline map of North America, mark the daily position of fronts and


Keep trail of the air. On an outline map of North America, indication the daily lie of fronts and influence systems for a end of different weeks or more. (This advice can be obtained from newspapers, the TV tidings, or from the Internet.) Plot the unconcealed upper-level flow specimen on the map. Observe how the deportment systems instigate. Relate this advice to the embodied on wreath, fronts, and cyclones adept in later chapters.