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## Weather Theory and Reports Chapter4 

## Introduction 

Weather is the state of the atmosphere at a given time and place, with respect to temperature, moisture content, turbulence, and cloudiness. These factors interact to form the following five major meteorological elements: 

• Atmospheric pressure (high or low), 

• Air temperature (heat or cold), 

• Wind (calm or storm), 

• Clouds (clearness or cloudiness), and 

• Precipitation (rain, sleet, snow). 

A solid understanding of weather theory provides the tools necessary to understand the reports and forecasts obtained from a Flight Service Station (FSS) weather specialist and other aviation weather services. No other means of aviation relies more heavily on knowledge and understanding of weather for its safety than ballooning. It is important to note, however, that there is no substitute for experience. 

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