The US National Oceanic and Atmospheric Administration says that conditions in the atmosphere and the ocean favor a near-normal hurricane season in the Atlantic Basin this season. The Atlantic hurricane season starts 1 June until 30 November.
For the entire six-month season, NOAA’s Climate Prediction Center says there’s a 70 percent chance of nine to 15 named storms (with top winds of 63 kilometers per hour or higher), of which four to eight will strengthen to a hurricane (with top winds of 119 kmh and of those one to three will become major hurricanes (with top winds of 178 kmh or higher, ranking Category 3, 4 or 5).
Based on the period 1981-2010, an average season produces 12 named storms with six hurricanes, including three major hurricanes. 2011 was an active Atlantic hurricane season with 19 tropical storms of which 7 became hurricanes.
Tropical Cyclones: Questions and answers