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Low-pressure areas can also form due to organized thunderstorm activity over warm water. When this occurs over the tropics in concert with the Intertropical Convergence Zone , it is known as a monsoon trough .
Low-pressure areas can also form due to organized thunderstorm activity over warm water. [6] When this occurs over the tropics in concert with the Intertropical Convergence Zone, it is known as a monsoon trough. [7] Monsoon troughs reach their northerly extent in August and their southerly extent in February.
A trough is an elongated region of relatively low atmospheric pressure without a closed isobaric contour that would define it as a low pressure area. Since low pressure implies a low height on a pressure surface, troughs and ridges refer to features in an identical sense as those on a topographic map. Troughs may be at the surface, or aloft, at ...
"A zone of low pressure will form across the western Caribbean, accompanied by clusters of tropical downpours and thunderstorms over the next several days," AccuWeather Meteorologist Alyssa Glenny ...
The Intertropical Convergence Zone is the result of the northeasterly trade winds and southeasterly trade winds converging in an area of high latent heat and low pressure. [3] As the two trade winds converge, the cool, dry air collects moisture from the warm ocean and rises, contributing to cloud formation and precipitation.
The rising air creates a low pressure zone near the equator. As the air moves poleward, it cools, becomes denser, and descends at about the 30th parallel, creating a high-pressure area. The descended air then travels toward the equator along the surface, replacing the air that rose from the equatorial zone, closing the loop of the Hadley cell. [3]
In the case of low wind shear, an organizing tropical feature does not get torn apart before it can fully develop. Meanwhile, warm water provides fuel for additional showers and thunderstorms to ...
On the back edge of the rain shield associated with mature squall lines, a wake low can form, which is a mesoscale low-pressure area that forms behind the mesoscale high-pressure system normally present under the rain canopy, which are sometimes associated with a heat burst. [18]