Tropical Cyclone

Science / Weather / Tropical Cyclone: A warm core low pressure system which develops over tropical, and sometimes subtropical, waters, and has an organized circulation. Depending on sustained surface winds, the system is classified as a tropical disturbance, a tropical depression, a tropical storm, or a hurricane or typhoon.

Tropical Wave

Science / Weather / Tropical Wave: Another name for an easterly wave, it is an area of relatively low pressure moving westward through the trade wind easterlies. Generally, it is associated with extensive cloudiness and showers, and ma MORE

Tropical Storm

Science / Weather / Tropical Storm: A tropical cyclone in which the maximum sustained surface winds are from 39 miles per hour (34 knots) to 73 miles per hour (63 knots). At this point, the system is given a name to identify and track i MORE

Tropical Depression

Science / Weather / Tropical Depression: A tropical cyclone in which the maximum sustained surface winds are 38 miles per hour (33 knots) or less. Characteristically having one or more closed isobars, it may form slowly from a tropical distu MORE

Cyclone

Science / Weather / Cyclone: An area of closed pressure circulation with rotating and converging winds, the center of which is a relative pressure minimum. The circulation is counterclockwise in the Northern Hemisphere and clockw MORE

Tropical Signs

Science / Astrology / Tropical Signs: Cancer and Capricorn; so-called because they occupy parts of the ecliptic where the Sun reaches its farthest point north (Tropic of Cancer) and south (Tropic of Capricorn). The Sun's ingress into thes MORE

Tropical Prediction Center (TPC)

Science / Weather / Tropical Prediction Center (TPC): A division of the National Centers for Environmental Prediction, the Center issues watches, warnings, forecasts, and analyses of hazardous weather conditions in the tropics for both domestic and inter MORE

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