A Meteo grams is a graphical representation of the weather development for a regional area. Mostly they are used for prediction purposes and results of the calculations of a numerical prediction model for a prediction period. Meteograms are available in different distribution for the areas of Germany, Central Europe and the entire forecast range of the local model ( Europe) of the German Weather Service (DWD ). Forecast Meteograms many regions of Europe and the world are also available for individuals with the Norwegian weather service yr.no. OpenSeaMap provides worldwide for 5000 ports meteograms for a forecast period of eight days.