Fujiwhara effect The Fujiwhara effect describes the rotation of two storms around each other. Funnel cloud A rotating, cone-shaped column of air extending downward from the base of a thunderstorm but not touching the ground. When it reaches the ground it is called a tornado. Top Gale wa...
Also called an easterly wave, African easterly wave, invest, or tropical disturbance, a tropical wave is generally a slow-moving disturbance that's embedded in the easterly trade winds. To put that more simply, it's a weak trough of low pressure that develops from an unorganized cluster of ...