Discuss how weather maps and charts are prepared and how are they useful to us.

 The observations being taken at fixed hours are transmitted by code to the forecasting stations. The central office keeps a record of the observations which form the basis for making the weather maps and charts.

Weather maps and charts are useful to us. They provide the primary tools for weather forecasting. They help in locating and identifying different air masses, pressure systems etc. They are useful to pilots and defence personnels like farmers and fishermen.