Cold fronts form between two air masses that barely move, while stationary fronts form when a warm air mass is trapped between two cold air masses. … They form over water with cool, moist air. They bring dense, heavy snow in the winter. They have cool, dry air that forms over land.
How is a cold front different from a warm front?
The air behind a cold front is colder and drier than the air in front. … A warm weather front is defined as the changeover region where a warm air mass is replacing a cold air mass. Warm fronts usually move from southwest to northeast and the air behind a warm front is warmer and moister than the air ahead of it.
How does a warm front form quizlet?
A warm front forms when warm air moves over cold air. … forms when cold, dense air moves into a region occupied by warmer air. Stationary fronts. The surface position of the front does not move.
What kind of weather does a stationary front bring quizlet?
Stationary fronts often bring several days of cloudy, wet weather that can last a week or more. How does an occluded front form? An occluded front forms as the cold air behind the cold front meets the cold air ahead of the warm front.
Where does rain occur in a warm front quizlet?
Where does rain occur in a warm front? Rain occurs along and in front of a warm front.
What weather does warm front bring?
Warm fronts often bring stormy weather as the warm air mass at the surface rises above the cool air mass, making clouds and storms. … As the front passes over an area, the clouds become lower, and rain is likely. There can be thunderstorms around the warm front if the air is unstable.
What type of weather front is considered hidden?
Occluded fronts get their name from the fact that when the cold air pushes underneath the warm air, it lifts the warm air up from the ground, which makes it hidden, or “occluded.”
What type of front is still and not moving?
Stationary Front: a front that is not moving. When a warm or cold front stops moving, it becomes a stationary front.
How are stationary fronts represented on a weather map?
A stationary front is depicted by an alternating red and blue line with a triangle on the blue portion and half-moon on the opposite side of the red portion of the line. A cold front (or warm front) that stops moving becomes a stationary front.
What happens when warm front passes?
When a warm front passes through, the air becomes noticeably warmer and more humid than it was before. … An abrupt temperature change over a short distance is a good indication that a front is located somewhere in between. If warmer air is replacing colder air, then the front should be analyzed as a warm front.
Why is cold front weather usually more severe than warm front weather Choose all that apply?
Why is cold-front weather usually more severe than warm-front weather? Cold fronts move more quickly than warm fronts and they approach at a steeper angle, causing more rapid uplift of air and storm generation.
Why do fronts cause rain quizlet?
When cold air moves under warm air and pushes the warm air up. They move quickly and bring thunderstorms, heavy rain, or snow. … When warm air moves over cold air. The front moves slowly and bring drizzly rain, which is followed by clear and warm weather.
What are the first signs of an approaching warm front?
The first signs of an approaching warm front are the appearance of high, thin, wispy cirrus clouds. As the front nears, the clouds will become lower in the sky and be thicker, since there will be more air at lower elevations from which to condense clouds.
Is a warm front high or low pressure?
Warm fronts are often associated with high-pressure systems, where warm air is pressed close to the ground. High-pressure systems usually indicate calm, clear weather.
What type of weather does an occluded front bring?
The temperature drops as the warm air mass is occluded, or “cut off,” from the ground and pushed upward. Such fronts can bring strong winds and heavy precipitation. Occluded fronts usually form around mature low pressure areas.
What do the weather fronts mean?
A weather front is a boundary between two air masses. It can be thought of like the frontline in a battle, where the warm air represents one side and its ‘enemy,’ the cold air, the other side. Across a front, there can be large variations in temperature, as warm air comes into contact with cooler air.