a cold front along which squalls or thunderstorms are likely
squall line的用法和样例:
例句
Squally thunderstorms within a squall line. 飑线中的狂风雷暴。
The squall line is a kind of instable and strong convective weather caused by the air with upper-layer dry and lower-layer wet in front of the upper-troposphere trough. 分析指出,该飑线系统是由高空槽前型的上干下湿引起的不稳定强对流天气。