The Influence of High and Low Pressure Systems on Hurricane Movement as Seen over North America

illustrate one of the many atmospheric controls that influence the trajectories, speed, and intensity of hurricanes. The article developed as an exercise aimed at viewing the impact of welldeveloped high pressure cells on well-developed low pressure systems. The hurricane is used as the model of the well-developed low pressure system, because it is compact, mobile, and well-defined. Thus, the relationships between low pressure and high pressure systems can best be documented, isolated, and studied using hurricanes as the model. It is important that the reader understand that past research has identified many controls affecting the movements and velocities of hurricanes, e.g. the jet stream, temperatures of ocean water, upperlevel disturbances, etc. There are several good sources the reader might consult for further indentification of these guidance systems, for example: G.W. Cry, Tropical Cyclones of the North Atlantic, Tracks and Frequencies of Hurricanes and Tropical Storms, 1871·1963 Technical Paper No. 55, U.S. Weather Bureau, 1965, and J.R. Hope, and C.J. Neilmann, "An Operational Tecnique for Relating the Movement of Existing Tropical Cyclones to Past Tracks," Monthly Weather Review, Vol. 98,1970