...This set includes companion CSS files for popular weather service API. Presently there are mappings for Forecast.io, Open Weather Map, World Meteorological Organization, Weather Underground, and Yahoo. Check the API List to see the class names. To use the wind indicators, you must also use weather-icons-wind.min.css along with the default CSS file. To display a wind indicator, you must use the base class wi and wi-wind, and then include the towards/from direction you want, like from-293-deg.