Tropical Storm 18 : Tropical cyclone with winds of 39 to 74 mph. In most of the world, a storm is given a name when it reaches tropical storm intensity
USA Today, Hurricane, tropical cyclone glossary: Definitions of terms used to describe tropical cyclones, Information on this page adapted from: Hurricane Watch: Forecasting the Deadliest Storms on Earth by Dr. Bob Sheets and Jack Williams, Vintage Books, USA 2001. http://www.usatoday.com/weather/hurricane/glossary .htm, (ND/Hurr - Amer) {506}