The physics of atmospheric motion is described simply by Newton’s four laws of motion together with the ideal gas law of classical thermodynamics. Although independent analyses of various parts of the motions seem self-explanatory, the syntheses of these parts obey the laws of random motion which require methods of the statistical sciences and theory of probability. Finding the various joint probability distributions becomes an engineering challenge whose solutions lie beyond the methodology of currently accepted mathematical techniques for understanding and for solving any atmospheric anomaly.

One of these is known as zonal anomaly. This is the domination of latitudinal motion easterly or westerly as pressure differences between middle-latitude of 35° and 55° covering almost entirely the whole continental states of the United States of America with the exceptions of few southern states like Alabama, Florida, Georgia, Louisiana, Mississippi, most of Texas and South Carolina, parts of Oklahoma, New Mexico, Arizona, Arkansas, and California. One of the big questions of weather forecasting is the relation between zonal anomaly and rainfall frequency.