What is the definition of a trough in meteorology?

A trough in meteorology is defined as an elongated region of relatively low atmospheric pressure. This feature is significant because it often acts as a conduit for weather systems, can influence wind patterns, and is associated with various types of weather phenomena. In general, a trough is linked to unstable air and can lead to cloud formation and precipitation. Troughs are typically found in the context of larger weather systems, such as low-pressure areas or mid-latitude cyclones, where they play a crucial role in organizing weather patterns over time. Understanding this concept is fundamental in meteorology, as it helps in predicting conditions related to storms and changes in temperature.