Key Features of a
Frontal Squall Line
q As the cold air mass advances, warm moist air
ahead of it is forced to rise.
qOnce
the moist air is lifted to its level of free convection, the air rises
creating deep thunderstorms.
qThe
stratosphere acts as a lid on the storms.
qCold,
dry air typically approaches the line of thunderstorms from the west behind
the front.