A minor trough is a relatively small area of low pressure in a weather system. Some synonyms that can be used to describe a minor trough include a low-pressure system, depression, or small-scale cyclone. Other terms that can be used include a dip in the weather system, a minor storm, or a disturbance. The term 'trough' can also be substituted with 'channel', 'trough line', or 'convergence zone' when referring to a minor trough. Regardless of the terminology used, a minor trough in a weather system can affect local weather conditions by bringing precipitation, temperature changes, and wind patterns. Understanding the various synonyms for minor troughs can be helpful in interpreting weather forecasts and patterns.