Weather map motion. Two-dimensional streamlines based on wind speeds at various levels show areas of convergence and divergence in the wind field, which are helpful in determining the location of features within the wind pattern. A popular type of surface weather map is the surface weather analysis, which plots isobars to depict areas of high pressure and low pressure. Cloud codes are translated into symbols and plotted on these maps along with other meteorological data that are included in synoptic reports sent by professionally trained observers. The use of weather charts in a modern sense began in the middle portion of the
Weather risk management "Accounting for weather derivatives" provides guidance on accounting for weather derivatives that are not exchange–traded. Entities that enter into speculatives or trading non–exchange derivatives contracts should apply the intrinsic method. Weather risk management Weather risk management is a type of risk management done by organizations to address potential financial losses caused by unusual weather. Energy, agriculture, transportation, construction, municipalities, school districts, travel, food processors, retail sales and real estate are all examples of industries whose operations and profits can be significantly affected by the weather. For example, unusually mild winters diminish consumer demand for heating and erode the profit margins