A line storm is a type of thunderstorm that forms along a weather front or boundary, bringing strong winds, hail, and lightning. While "line storm" is a commonly used term, there are a number of synonyms that are synonymous with this weather phenomenon. Some synonyms for "line storm" include squall line, gust front, outflow boundary, and bow echo. Each of these terms refers to specific elements of a line storm, such as the strong gusts of wind that can arrive ahead of the thunderstorm or the distinctive curved shape of the storm on a weather radar map. No matter what you call it, a line storm can be a powerful and potentially dangerous weather event.