![]() ![]() Here is how you interpret the surface station plot models for the World Meteorological Organization (WMO) and USA. Unfortunately, different weather organizations/ countries use different station plot models and different codes. Normally, the station circles in (a) and (b) are plotted superimposed. The circle represents the station location. Before the days of computerized geographic information systems (GIS), meteorologists had to rely on abbreviated codes to pack as much data around each plotted weather station as possible. The standardized arrangement of these data in a grid is called a station plot model (Fig. On weather maps, the location of each weather station is circled, and that station’s weather data is plotted in and around the circle. The field of study of these weather features (fronts, highs, lows, etc.) is called synoptics, and the people who study and forecast these features are synopticians. The resulting synoptic-weather map shows scales of weather (see table in the Forces & Winds chapter) that are called synoptic-scale. This last step often involves interpolation to a grid (if it is to be analyzed by computers), or drawing of isopleths and identification of weather features (lows, fronts, etc.) if used by humans. Third, the data is analyzed, which means it is integrated into a coherent picture of the weather. Second, the data is tested for quality, where erroneous or suspect values are removed. First, the weather data must be observed and communicated to central locations. Three steps are needed to create such maps. By studying both maps, you can get a feeling for the three-dimensional characteristics of the weather. It also indicates high and low centers, and the trough axis (dashed light purple line). 9.13b shows an upper-air synoptic map for geopotential heights of the 50 kPa isobaric surface (a surrogate for pressure) near the middle of the troposphere valid at the same time, using data from weather balloons, aircraft, satellite, and ground-based remote sensors. It shows pressure reduced to mean sea-level (MSL), fronts, and high (H) and low (L) pressure centers. ![]() 9.13a shows an example of a synoptic weather map for pressure at the bottom of the troposphere, based on surface weather observations. Figure 9.13 Examples of synoptic weather maps, which give a snapshot of the weather at an instant in time. So computers or people can analyze the map to create a coherent picture that integrates together all the weather elements, such as in Fig. So a shorthand notation called a station-plot model was devised to use symbols or glyphs for each weather element, and to write those data around a small circle representing the station location.īut the raw numbers and glyphs plotted on a map at hundreds of stations can be overwhelming. For any one station, the weather observations include many different variables. Weather observations that were taken synoptically (i.e., simultaneously) at many weather stations worldwide can be drawn on a weather map. ![]()
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