A cold front because a warm front would be hot and humid
true
cold front
Continental polar masses are cold and dry air masses because the cold air cannot hold much moisture. As they move into warmer air, they can trigger precipitation.
When cold air runs into warm air on a large scale it forms a cold front. If the warm air mass is unstable enough this can trigger thunderstorms, potentially strong ones. Given a few other conditions these storms can begin to rotate and produce tornadoes. Most strong thunderstorms are associated with cold fronts. However, another significant source of tornadoes. This is a similar scenario to a cold front, only there is a dry air mass pushing into a moist one with little temperature difference. A dry line is even more effective at producing tornadoes than a cold front.
A cold front.
An Arctic cold front.
yes
true
no
The air behind a cold front is cool and dry.
cold front
cold front
The boundaries between air masses are called front. The types of air mass and movements involved determine the type of front. Warm front: a warm air mass plows into a cold air mass. Cold front: a cold air mass plows into a warm air mass. Stationary front: The warm and cold air masses move little relative to one another. Occluded front: A cold front catches up with a warm front, sending the warm air mass aloft. Dry line: a dry air mass plows into a moist air mass.
The air behind a cold front is cool and dry.
Sinking air, combines with dry weather and only a few clouds are indicators of a cold front. Cold air is heavier and more dense than warm air.
The four types of fronts change the weather on Earth. A warm front brings warm, humid air and a cold front brings dry, cool air. A stationary front does not move and have winds parallel to the front. An occluded front occurs when cold air overtakes warm air.
The line where these two air masses meet is called a front.If cold air advances and pushes away the warm air, it forms a cold front.Cold fronts are associated with rain following the front itself.When warm air advances, it rides up over the denser, cold air mass to form a warm front.Warm fronts are associated with rain leading the front itself.If neither air mass advances, it forms a stationary front.If dry air advances into moist air and there is no significant temperature difference, it forms a dry line.It is not uncommon to see severe thunderstorms develop along cold fronts and dry lines.