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 may be associated with possible tropical cyclone development.
Wave Adjective Synonyms: swell, undulation, billow, sea, heave, roller, whitecap, white horse, ripple, wavelet, breaker, comber
Science / Weather / Easterly Wave: An inverted, migratory wave-like disturbance or trough in the tropical region that moves from east to west, generally creating only a shift in winds and rain. The low level convergence and associated MORE
Science / Weather / Tropical Disturbance: An area of organized convection, originating in the tropics and occasionally the subtropics, that maintains its identity for 24 hours or more. It is often the first developmental stage of any subseque MORE
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
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 t MORE
Science / Tides and Currents / Tropical Month: The average period of the revolution of the Moon around the Earth with respect to the vernal equinox. Its length is approximately 27.32 1,582 days. MORE