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average is 12. The most likely number of hurricanes (winds of at least 74 mph) predicted to occur in the North Atlantic during the June to November period is 6, with a 70% chance that the number will be in the range 4 to 8. The 1981-2010 long-term average is 6. An ACE index of 105 is predicted

In order to categorise tropical cyclones around the world, the Saffir-Simpson Hurricane Wind Scale is used defining events by their wind speed and impacts.

Although developed in the USA, tropical cyclones around the world are measured by the Saffir-Simpson Hurricane Wind Scale which originated from 1971 with Herbert Saffir, a civil engineer and Bob Simpson of the US National Hurricane Center. The Saffir-Simpson Hurricane Wind Scale consists of a five

-term average is 12. The most likely number of hurricanes (winds of at least 74 mph) predicted to occur in the North Atlantic during the June to November period is 8, with a 70% chance that the number will be in the range 6 to 10. The 1981-2010 long-term average is 6. An ACE index of 145 is predicted

The sea temperature is at its hottest between September and October which also means that the hurricane risk is greater during that period. Cancun’s warm sea temperature makes it a popular destination for fans of water sports. November to April is Cancun’s dry season so expect prices

normal activity relative to the 1980-2010 long-term average of 12. This figure is in addition to Tropical Storm Ana which occurred in May 2015, outside the forecast period. The most likely number of hurricanes (winds of at least 74 mph) predicted to occur in the North Atlantic during the June

of the weekend with sunshine and showers, the heaviest of the showers being in the north. So far this autumn, hurricanes have rarely been out of the headlines, as they have brought devastation to parts of the Caribbean and the southern United States. These systems often head north out of the tropics, but when

. It typically moves forward at speeds of 10-15 m.p.h., but can travel as fast as 40 m.p.h. At its very early and weak stages it is called a Tropical Depression. When the winds reach 39 m.p.h. it is called a Tropical Storm. If the wind should reach 74 m.p.h. or more the tropical storm is called a Hurricane

Hurricane is another name for a tropical cyclone that forms specifically in the Atlantic or eastern Pacific Oceans. They refer to a revolving storm formed over tropical or sub-tropical oceans.

, but all result from the same processes. When wind speeds reach 74 mph, the tropical cyclone is referred to as a hurricane, typhoon or simply a cyclone depending upon where it is on the globe. By this stage they can be 300 to 500 miles across and up to five to six miles high. If the tropical

to the 1980-2010 long-term average of 12. The most likely number of hurricanes predicted to occur in the North Atlantic during the June to November period is 9, with a 70% chance that the number will be in the range 4 to 14. This represents above normal activity relative to the 1980-2010 long-term

and had developed a clear, well-defined eye structure. Wind speeds were measured by the ASCAT satellite instrument* to be at Tropical storm intensity, sustaining winds of 55 knots (63 mph). The system soon lost its Hurricane-like appearance but went on to cause heavy rainfall and flooding over Greece