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 insurance also taken into consideration. If a car dealership wanted to insure a conditional weather promotion in which new car buyers would receive a rebate if at least 2 inches of rain fell at their location on the day after Easter, the client would need to contact the insurance company about two weeks prior to the peril date. The insurer, in turn, would price the insurance policy based on weather history for that city and state on the date that is being "insured", the type of peril being covered, and the volume of sales expected during the promotion. Weather insurance Weather