Warm Fronts. Warm front- a front in which warm air replaces cooler air at the surface. Some of the characteristics of warm fronts include the following: The slope of a typical warm front is more gentle than cold fronts. Warm fronts tend to move slowly. Warm fronts are typically less violent than cold fronts. Although they can trigger thunderstorms, warm fronts are more likely to be associated with large regions of gentle ascent stratiform clouds and light to moderate continuous rain.
Warm fronts are usually preceded by cirrus first km ahead , then altostratus or altocumulus km ahead , then stratus and possibly fog. Behind the warm front, skies are relatively clear but change gradually. Warm fronts are associated with a frontal inversion warm air overrunning cooler air.
If a warm front exists on a weather map, it will be northeast of the cold front and often, to the east of a surface low pressure area. Clouds and precipitation are quite prevalent to the north of the warm front. In Oklahoma, warm fronts are rare in the winter and non-existent in the summer.
Stationary front- a front that does not move or barely moves. Stationary fronts behave like warm fronts, but are more quiescent. Many times the winds on both sides of a stationary front are parallel to the front. Typically stationary fronts form when polar air masses are modified significantly so as to lose their character e.
Figure 4 - Development of an Occluded Front. Tropical waves are fronts that develop in the tropical Atlantic Ocean off the coast of Africa. These fronts can develop into tropical storms or hurricanes if conditions allow.
Fronts move across the Earth's surface over multiple days. The direction of movement is often guided by high winds, such as Jet Streams. Landforms like mountains can also change the path of a front. There are four different types of weather fronts: cold fronts, warm fronts, stationary fronts, and occluded fronts. A side view of a cold front A, top and how it is represented on a weather map B, bottom.
A cold front forms when a cold air mass pushes into a warmer air mass. Cold fronts can produce dramatic changes in the weather. They move fast, up to twice as fast as a warm front. As a cold front moves into an area, the heavier more dense cool air pushes under the lighter less dense warm air, causing it to rise up into the troposphere. Lifted warm air ahead of the front produces cumulus or cumulonimbus clouds and thunderstorms, like in the image on the left A. As the cold front passes, winds become gusty.
There is a sudden drop in temperature, and also heavy rain, sometimes with hail, thunder, and lightning. Atmospheric pressure changes from falling to rising at the front. After a cold front moves through your area, you may notice that the temperature is cooler, the rain has stopped, and the cumulus clouds are replaced by stratus and stratocumulus clouds or clear skies. On weather maps, a cold front is represented by a solid blue line with filled-in triangles along it, like in the map on the left.
The triangles are like arrowheads pointing in the direction that the front is moving. Notice on the map that temperatures at the ground level change from warm to cold as you cross the front line. A side view of a warm front A, top and how it is represented on a weather map B, bottom. A warm front forms when a warm air mass pushes into a cooler air mass, shown in the image to the right A.
Warm fronts often bring stormy weather as the warm air mass at the surface rises above the cool air mass, making clouds and storms. Warm fronts move more slowly than cold fronts because it is more difficult for the warm air to push the cold, dense air across the Earth's surface.
Definition of front Entry 4 of 4. Other Words from front Adjective front adverb. Examples of front in a Sentence Noun the front of the church features a magnificent stained-glass window that smile is just a front —I don't think she actually likes me at all Verb The house fronts Main Street.
The house fronts on Main Street. He is now fronting a different band. He fronts a talk show. Adjective There's a small statue on the front lawn. He keeps his wallet in his front pocket. First Known Use of front Noun 13th century, in the meaning defined at sense 1a Verb , in the meaning defined at intransitive sense 1 Adjective , in the meaning defined at sense 1a.
Learn More About front. Time Traveler for front The first known use of front was in the 13th century See more words from the same century. From the Editors at Merriam-Webster. Welcome to the New Words Welcome to the New Words We've expanded the dictionary with more than words and definitions. Phrases Related to front back to front front desk front nine.
Style: MLA. More Definitions for front. English Language Learners Definition of front Entry 1 of 3. Kids Definition of front Entry 1 of 3.
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