Hurricane Floyd. Coloured three-dimensional computer image, based on satellite data, of Hurricane Floyd. The hurricane is the white swirl of clouds in the Atlantic Ocean off the coast of Florida (top left), USA. North is towards top right. Land is green/brown and water is blue. The winds in this hurricane reached over 225 kilometres per hour. After devastating the Bahamas, Hurricane Floyd hit Florida on September 16th, going on to cause 40 deaths. Hurricanes are caused by massive evaporation and convection over warm tropical seas. Image taken at 12:59 GMT on 14 September 1999 by an American NOAA satellite.