Easterly waves last from a couple of days to several weeks and new waves are developing at intervals of 3 to 4 days.
easterly wave"A migratory wavelike disturbance of the tropical easterlies. It is a wave within the broad easterly current and moves from east to west, generally more slowly than the current in which it is embedded.
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.
Easterly Wave: A wavelike disturbance in the tropical easterly winds that usually moves from east to west. Such waves can grow into tropical depressions. ...
Easterly wave
A migratory wave like trough or disturbance in tropical regions that moves from east to west. Normally it moves slower then the winds in which it is embedded. It is often associated with tropical cyclone development.
Echo ...
EASTERLY WAVE- An inverted trough in the tropics that moves with the tropical easterlies.
ECHO(ES)- This refers to radar returns such as precipitation echoes.
Easterly Wave - A large migratory wavelike disturbance in the trade winds that sometimes triggers the formation of a hur ricane.
Eccentricity - The variation of an elipse from a circle.
Electromagnetic Radiation - See Radiation.
Easterly Wave: Disruption in the form of trough in the east current of the tropics, which is more evident in high levels than in the surface analysis, and whose passage to the west is marked by an increase in nebulosity and showers.
In operational meteorology, dynamics usually refer specifically to those forces that produce vertical motion in the atmosphere.
Easterly Wave- A wavelike disturbance in the tropical easterly winds that usually moves from east to west.
Frequently Asked Questions: What is an easterly wave?. NOAA. Retrieved on 2006-07-25.
^ Landsea, Chris (June 1993). "A Climatology of Intense (or Major) Atlantic Hurricanes" (PDF). Monthly Weather Review 121 (6): 1703-1713.
It moves faster than an Easterly Wave between 20 and 40 mph. They move off the African coast every 4 to 5 days mainly in the summer. Some reach the American tropics and a few develop into tropical cyclones.
Easterly WaveA low level disturbance of tropical origins. Easterly waves can develop into tropical cyclones. However, tropical cyclone development is not required in order for these systems to produce significant amounts of rainfall.
The second source for thunderstorms that can create hurricanes are from eastward moving atmospheric waves, called easterly waves. Easterly waves are similar to waves in the mid-latitudes, except they are in the easterly trade-flow.
Right now, scientists are asking the ultimate question - How do the Saharan Air Layer and the African Easterly Wave mingle to create tropical cyclones?
westerly wave - An atmospheric wave disturbance embedded in a mean westerly flow, such as in the midlatitudes. Compare easterly wave.
wet air - A volume of air that is in a state of saturation.
 See also: Equator, Ocean, Cloud, Cyclone, Weather
  
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