A tropical cyclone is a warm-core, low pressure system without any front attached, that develops over the tropical or subtropical waters, and has an organized circulation. Depending upon location, tropical cyclones have different names around the world. In the: Atlantic/Eastern Pacific Oceans - hurricanes Western Pacific - typhoons Indian Ocean - cyclones Regardless of what they are called, there are several favorable environmental conditions that must be in place before a tropical cyclone can form. They are: -Warm ocean waters (at least 27°C) throughout a depth of about 150 ft. (46 m). -An atmosphere which cools fast enough with height such that it is potentially unstable to moist convection. -Relatively moist air near the mid-level of the troposphere (16,000 ft. / 4,900 m). -Generally a minimum distance of at least 300 miles (480 km) from the equator. -A pre-existing near-surface disturbance. -Low values (less than about 23 mph / 37 km/h) of vertical wind shear between the surface and the upper troposphere. Vertical wind shear is the change in wind speed with height. https://facebook/photo.php?fbid=1487812311444942&set=ms.1487812311444942.1487812114778295.1487811221445051.1487811244778382.bps.a.1487811184778388.1073741830.100006485632148&type=1&theater
Posted on: Thu, 28 Nov 2013 17:21:14 +0000
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