Twenty-one days since Erika struck | Dominica News Online | Commonwealth of Dominica | Scoop.it

History will prove that the headline of this article may not necessarily be the truth, since a tropical depression is a tropical cyclone with wind speeds of 33 knots (38 mph) or less. Once a tropical depression has wind speeds of 34 knots or greater, it is called a tropical storm. A tropical depression has evidence of organized winds and thunderstorms in contrast to a tropical wave or disturbance. Sometimes, the media will confuse people by naming a tropical depression. This is usually a case where a storm did move up to a tropical storm strength, but later was downgraded back to a tropical depression.