Route showers is a term used to describe a type of precipitation that occurs when a warm front passes over a cold air mass. This type of precipitation is characterized by heavy rain and thunderstorms, and is often accompanied by strong winds. The term 'route showers' comes from the fact that these storms tend to follow a particular path or route. The crossword solution MAPS is an acronym for Meteorological Aeronautical Presentation System, which is a system used to display weather information in graphical form.