A warm air mass pushes into a colder air mass (the warm front), and then another cold air mass pushes into the warm air mass (the cold front). Because cold fronts move faster, the cold front is likely to overtake the warm front. This is known as an occluded front.
What causes an occluded front quizlet?
An occluded front forms when a warm air mass is caught between two colder air masses. The coldest air mass then moves forward until it meets a cold air mass that is warmer and less dense. The colder of these two air masses moves under and pushes up the warmer and less dense.
How do you get a occluded front?
Symbolically, an occluded front is represented by a solid line with alternating triangles and circles pointing the direction the front is moving. On colored weather maps, an occluded front is drawn with a solid purple line.
What type of weather is caused by an occluded front?
What type of weather can occur at an occluded front? There is often precipitation along an occluded front from cumulonimbus or nimbostratus clouds. Wind changes direction as the front passes and the temperature either warms or cools. After the front passes, the sky is usually clearer, and the air is drier.
What is a occluded front quizlet?
Occluded Front. -forms when a warm air mass is caught between two colder air masses. -cold air mass and cool air mass come together, the warm air caught between them is “cut off” (forced upward) -can have cool temperatures and large amounts of rain and snow.
How is an occluded front different from other fronts?
There are two different forms of occluded front. … The colder air behind the front undercuts and pushes up the air ahead of it. The other type of occluded front is the warm occlusion. A warm occlusion occurs when the cold air behind the occluded front is warmer than the air ahead of it.
What happens during a occluded front?
At an occluded front, the cold air mass from the cold front meets the cool air that was ahead of the warm front. The warm air rises as these air masses come together. Occluded fronts usually form around areas of low atmospheric pressure.
Do occluded fronts cause tornadoes?
Cold Occluded Front
Cold fronts are responsible for the strong, severe storms that can produce damaging winds, hail and tornadoes.
What is another name for occluded front?
In this page you can discover 3 synonyms, antonyms, idiomatic expressions, and related words for occluded-front, like: cold-front, warm-front and occlusion.
What is occluded weather?
In meteorology, an occluded front is a weather front formed during cyclogenesis. The classical view of an occluded front is that it initiates when a cold front overtakes a warm front, such that the warm air is separated (occluded) from the cyclone center at the surface.
Do occluded fronts cause thunderstorms?
A thunderstorm is a storm that produces thunder and rain, on average lasting about 30 minutes and averaging about 15 miles in diameter. There are four types of weather fronts that cause thunderstorms: cold front, warm front, stationary front and occluded front.
What is an occluded front distinguish between a cold occlusion and a warm occlusion quizlet?
Terms in this set (3) Occluded fronts usually form around mature low pressure areas. … 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.
What causes a warm front 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.
How does a stationary front form quizlet?
A stationary front forms when a cold front or warm front stops moving. This happens when two masses of air are pushing against each other but neither is powerful enough to move the other. Winds blowing parallel to the front instead of perpendicular can help it stay in place.
Are occluded fronts common?
Cold air occluded fronts are more common than warm occluded fronts. … Because fronts are zones where temperature opposites meet, weather changes are usually found along their edge.
Are occluded fronts stationary?
Stationary Front – a front between warm and cold air masses that is moving very slowly or not at all. Occluded Front – a composite of two fronts, formed as a cold front overtakes a warm or quasi-stationary front.
What are the differences between the occluded fronts shown in Figures A and B?
what are the difference between occluded fronts shown in Figure A and B? In figure A the cold air is pushing the colder air. In figure B colder air is pushing cold air. … In both, the clouds would form in the warm air masses bringing rain or snow.
What happens after an occluded front passes?
At an occluded front, the cold air mass from the cold front meets the cool air that was ahead of the warm front. The warm air rises as these air masses come together. … After the front passes, the sky is usually clearer and the air is drier.
What does the term occluded mean?
1 : to close up or block off : obstruct a thrombus occluding a coronary artery. 2 : to bring (upper and lower teeth) into occlusion. 3 : to take in and retain (a substance) in the interior rather than on an external surface : sorb proteins in precipitating may occlude alcohol.
How fast do occluded fronts move?
Occluded Fronts. A newly formed occlusion will initially move at the same speed as the cold front that overtakes the warm front. Eventually, the occluded front “wraps around” the baroclinic low as the low moves off of the frontal boundary back into the colder air.
What causes lightning?
Lightning is an electrical discharge caused by imbalances between storm clouds and the ground, or within the clouds themselves. Most lightning occurs within the clouds. … This heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash.
What is a stationary front?
A stationary front forms when a cold front or warm front stops moving. This occurs when two air masses are pushing against each other but neither is powerful enough to move the other. … If the wind direction changes the front will start moving again, becoming either a cold or warm front.
What does a Purple weather front mean?
Occluded fronts point to a decrease in intensity of the parent weather system and are indicated by a purple line with alternating triangles and half-moons on the side of its motion. … Warm occlusions occur when the air associated with the “cold” front is actually not a cold as the air mass associated with the warm front.
What kind of weather would you expect when approaching a Trowal?
Areas of intense lift and frontogenesis are commonly associated with TROWALs, hence they are favored regions for heavy and/or prolonged precipitation.
How does an occluded front form and the 2 types of occluded fronts?
An Occluded Front forms when a warm air mass gets caught between two cold air masses. … There are two types of occlusion, warm and cold: In a cold occlusion, the cold air mass overtaking the warm front is colder than the cool air ahead of the warm front, and plows under both air masses.
What situation creates a cold occlusion and what creates a warm occlusion?
If the air mass that arrives third is colder than either of the first two air masses, that air mass slip beneath them both. This is called a cold occlusion. If the air mass that arrives third is warm, that air mass rides over the other air mass. This is called a warm occlusion (Figure below).
What does a stationary front look like?
A stationary front is represented by alternating blue and red lines with blue triangles pointing towards the warmer air and red semicircles pointing towards the colder air. A noticeable temperature change and/or shift in wind direction is commonly observed when crossing from one side of a stationary front to the other.
What front causes flooding?
Flooding from Frontal Overrunning
When such a front present, warm, moist air originating over the Gulf of Mexico flows northward over the cool air-mass north of the front. This process, called frontal overrunning, produces clouds and rains north of the frontal boundary.
What front causes rain?
The air cools as it rises and the moisture condenses to produce clouds and precipitation ahead of and along the cold front. In contrast to lifting along a warm front, upward motions along a cold front are typically more vigorous, producing deeper clouds and more intense bands of showers and thunderstorms.
When a cold front and a warm front Meet you get?
When a cold front overtakes a warm front, it creates what’s called an occluded front that forces warm air above a frontal boundary of cooler air masses.
When a cold front catches up with a warm front and forces all of the air up creating low pressure?
Occluded Fronts
An occluded front usually forms around a low pressure system. The occlusion starts when a cold front catches up to a warm front. The air masses, in order from front to back, are cold, warm, and then cold again. Coriolis Effect curves the boundary where the two fronts meet towards the pole.
What type of front can cause cumulonimbus clouds to form & brings thunderstorms?
Cold fronts occur when heavy cold air displaces lighter warm air, pushing it upward. Cumulus clouds are the most common cloud types that are produced by cold fronts. They often grow into cumulonimbus clouds, which produce thunderstorms. Cold fronts can also produce nimbostratus, stratocumulus, and stratus clouds.
What is a stationary front quizlet?
stationary front. A boundary between air masses that don’t move possibly causing rain for several days. it can cause what. light precip., unsettled weather which can cause storms, and clouds fog.
How does the weather caused by a warm front compared to the weather caused by a cold front quizlet?
How does the weather caused by a warm front compare to the weather caused by a cold front? … A warm front brings widespread cloud cover, but a cold front brings intense sun coverage. A warm front brings rain in humid air on occasion, but a cold front brings thunderstorms in summer.
What is a cold front what is a warm front quizlet?
Warm Fronts. A warm air mass overtakes a slow-moving cold air mass. Cold Fronts. A cold front forms when a rapidly moving cold air mass runs into a slowly moving warm air mass. When they collide, the cold air moves under the warm air.
How is cold formation different from stationary front formation?
How is cold front formation different from stationary front formation? … 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.
How are cold fronts different from stationary fronts quizlet?
Cold fronts are different from stationary fronts since: Colder air masses move towards a warmer air mass a cold front forms. Stationary Fronts: Warm and cold air masses are on opposite sides and they move towards each other. … A cold front forms when a colder air mass moves toward a warmer air mass.
Why does rain occur near a warm front?
A warm mass of air will generally hold moisture picked up as it passes over large areas of water through the process of evaporation. As this warm moist air rises it cools and the water vapor condenses into rain. So a warm air mass tends to bring with it plenty of rain and drizzle.